I was coding along with tutorials from developer.android.com about working with opengl and as I have faced some errors I tried to fix them but it didn't work out. I have created main activity in which when you press the button the intent opens an opengl activity which displays a black screen but it doesn't display the triangle. Can you tell me where the problem is?
This is my MainActivity class:
package com.eBook.test;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
public class MainActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final Button button = (Button)findViewById(R.id.button);
button.setOnClickListener(new OnClickListener() {
public void onClick(View v){
Intent intent = new Intent (MainActivity.this, OpenGLES20Activity.class);
startActivity(intent);
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container,
false);
return rootView;
}
}
}
Everything seems ok with this, now here is my OpenGL Activity class:
package com.eBook.test;
import android.app.Activity;
import android.content.Context;
import android.opengl.GLSurfaceView;
import android.os.Bundle;
public class OpenGLES20Activity extends Activity {
private GLSurfaceView mGLView;
class MyGLSurfaceView extends GLSurfaceView {
public MyGLSurfaceView(Context context){
super(context);
// Create an OpenGL ES 2.0 context
setEGLContextClientVersion(2);
// Set the Renderer for drawing on the GLSurfaceView
setRenderer(new MyRenderer());
setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);
}
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Create a GLSurfaceView instance and set it
// as the ContentView for this Activity.
mGLView = new MyGLSurfaceView(this);
setContentView(mGLView);
}
#Override
protected void onPause() {
mGLView.onPause();
super.onPause();
}
#Override
protected void onResume() {
mGLView.onResume();
super.onResume();
}
}
That's my Renderer class:
package com.eBook.test;
import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.opengles.GL10;
import android.opengl.GLES20;
import android.opengl.GLSurfaceView;
public class MyRenderer implements GLSurfaceView.Renderer {
private Triangle mTriangle;
public void onSurfaceCreated(GL10 unused, EGLConfig config) {
// Set the background frame color
GLES20.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
// initialize a triangle
mTriangle = new Triangle();
}
public void onDrawFrame(GL10 unused) {
// Redraw background color
mTriangle.draw();
GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
}
public void onSurfaceChanged(GL10 unused, int width, int height) {
GLES20.glViewport(0, 0, width, height);
}
public static int loadShader(int type, String shaderCode){
// create a vertex shader type (GLES20.GL_VERTEX_SHADER)
// or a fragment shader type (GLES20.GL_FRAGMENT_SHADER)
int shader = GLES20.glCreateShader(type);
// add the source code to the shader and compile it
GLES20.glShaderSource(shader, shaderCode);
GLES20.glCompileShader(shader);
return shader;
}
}
And the Triangle class:
package com.eBook.test;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import android.opengl.GLES20;
public class Triangle {
private FloatBuffer vertexBuffer;
private int mProgram;
private int mPositionHandle;
private int mColorHandle;
// number of coordinates per vertex in this array
static final int COORDS_PER_VERTEX = 3;
static float triangleCoords[] = { // in counterclockwise order:
0.0f, 0.622008459f, 0.0f, // top
-0.5f, -0.311004243f, 0.0f, // bottom left
0.5f, -0.311004243f, 0.0f // bottom right
};
// Set color with red, green, blue and alpha (opacity) values
float color[] = { 0.63671875f, 0.76953125f, 0.22265625f, 1.0f };
private final String vertexShaderCode =
"attribute vec4 vPosition;" +
"void main() {" +
" gl_Position = vPosition;" +
"}";
private final String fragmentShaderCode =
"precision mediump float;" +
"uniform vec4 vColor;" +
"void main() {" +
" gl_FragColor = vColor;" +
"}";
public Triangle() {
int vertexShader = MyRenderer.loadShader(GLES20.GL_VERTEX_SHADER, vertexShaderCode);
int fragmentShader = MyRenderer.loadShader(GLES20.GL_FRAGMENT_SHADER, fragmentShaderCode);
mProgram = GLES20.glCreateProgram(); // create empty OpenGL ES Program
GLES20.glAttachShader(mProgram, vertexShader); // add the vertex shader to program
GLES20.glAttachShader(mProgram, fragmentShader); // add the fragment shader to program
GLES20.glLinkProgram(mProgram); // creates OpenGL ES program executables
// initialize vertex byte buffer for shape coordinates
ByteBuffer bb = ByteBuffer.allocateDirect(
// (number of coordinate values * 4 bytes per float)
triangleCoords.length * 4);
// use the device hardware's native byte order
bb.order(ByteOrder.nativeOrder());
// create a floating point buffer from the ByteBuffer
vertexBuffer = bb.asFloatBuffer();
// add the coordinates to the FloatBuffer
vertexBuffer.put(triangleCoords);
// set the buffer to read the first coordinate
vertexBuffer.position(0);
}
public void draw() {
// Add program to OpenGL ES environment
GLES20.glUseProgram(mProgram);
// get handle to vertex shader's vPosition member
mPositionHandle = GLES20.glGetAttribLocation(mProgram, "vPosition");
// Enable a handle to the triangle vertices
GLES20.glEnableVertexAttribArray(mPositionHandle);
// Prepare the triangle coordinate data
int vertexStride = 3;
GLES20.glVertexAttribPointer(mPositionHandle, COORDS_PER_VERTEX,
GLES20.GL_FLOAT, false,
vertexStride, vertexBuffer);
// get handle to fragment shader's vColor member
mColorHandle = GLES20.glGetUniformLocation(mProgram, "vColor");
// Set color for drawing the triangle
GLES20.glUniform4fv(mColorHandle, 1, color, 0);
// Draw the triangle
int vertexCount = 6;
GLES20.glDrawArrays(GLES20.GL_TRIANGLES, 0, vertexCount);
// Disable vertex array
GLES20.glDisableVertexAttribArray(mPositionHandle);
}
}
I don't really know what value should vertexCount and vertexStride hold, logically thinking vertexCount should be 3 maybe, don't know about the vertexStride.
Clear the background before drawing the triangle ;)
public void onDrawFrame(GL10 unused) {
// Redraw background color
GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
mTriangle.draw();
}
Related
I'm trying to animate a card flip and then fling it away with an animation. For the most part I've completed that. The problem is I can't get the card to reliably be removed.
Question: How can I reliably delete a View after animation on it is complete? (also I'm using AnimationSet, so this may change things)
Here is what my code looks like.
flingCardAway(the problem area)
private void flingCardAway(){
final View cardContainer = findViewById(R.id.card_container);
ViewCompat.setTranslationZ(cardContainer, 1.0f);
AnimationSet anim = new AnimationSet(true);
RotateAnimation rotate1 = new RotateAnimation(0,-45, Animation.RELATIVE_TO_SELF,0.5f , Animation.RELATIVE_TO_SELF,0.5f );
rotate1.setStartOffset(100);
rotate1.setDuration(500);
anim.addAnimation(rotate1);
TranslateAnimation trans1 = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, -0.1f, Animation.RELATIVE_TO_PARENT, -0.1f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f);
trans1.setDuration(600);
anim.addAnimation(trans1);
AlphaAnimation opacity1 = new AlphaAnimation(1.0f, 0.0f);
opacity1.setDuration(400);
opacity1.setStartOffset(200);
anim.addAnimation(opacity1);
cardContainer.setAnimation(anim);
cardContainer.setVisibility(View.VISIBLE);
anim.setAnimationListener(new Animation.AnimationListener(){
#Override
public void onAnimationStart(Animation arg0) {
}
#Override
public void onAnimationRepeat(Animation arg0) {
}
#Override
public void onAnimationEnd(Animation arg0) {
final View cardContainer2 = findViewById(R.id.card_container);
((ViewGroup)cardContainer2.getParent()).removeView(cardContainer2);
}
});
}
Full class for reference
Study.java
package com.example.trevorwood.biggles.study;
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.support.v4.view.ViewCompat;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.RotateAnimation;
import android.view.animation.TranslateAnimation;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import com.example.trevorwood.biggles.R;
public class Study extends AppCompatActivity {
LinearLayout mFlipCardLinearLayout;
LinearLayout mCardFlippedButtons;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_study);
Intent intent = getIntent();
// String value = intent.getStringExtra("key");
Toolbar toolbar = (Toolbar) findViewById(R.id.study_toolbar);
toolbar.setTitleTextColor(Color.WHITE);//0xAARRGGBB
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
mFlipCardLinearLayout = (LinearLayout) findViewById(R.id.flip_card_linear_layout);
mCardFlippedButtons = (LinearLayout) findViewById(R.id.card_flipped_buttons);
final Drawable upArrow = getResources().getDrawable(R.drawable.ic_back_arrow);
upArrow.setColorFilter(getResources().getColor(R.color.colorWhite), PorterDuff.Mode.SRC_ATOP);
getSupportActionBar().setHomeAsUpIndicator(upArrow);
makeNewCard();
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
// Respond to the action bar's Up/Home button
case android.R.id.home:
onBackPressed();
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public void onBackPressed() {
super.onBackPressed();
}
public void onCardClick(View view) {
flipCard();
}
public void onCardFlippedButtonsClick(View view) {
Integer numberPressed;
switch (view.getId()){
case R.id.color_button_1:numberPressed = 1;break;
case R.id.color_button_2:numberPressed = 2;break;
case R.id.color_button_3:numberPressed = 3;break;
case R.id.color_button_4:numberPressed = 4;break;
case R.id.color_button_5:numberPressed = 5;break;
default:numberPressed = 0;
}
saveCardStats(numberPressed);
flingCardAway();
resetForNewCard();
makeNewCard();
}
private void flipCard() {
FrameLayout cardFrame = (FrameLayout) findViewById(R.id.card_frame);
Integer childCount = cardFrame.getChildCount();
Log.d("Simple","childCount: "+childCount);
View cardContainer = findViewById(R.id.card_container);
View cardFace = findViewById(R.id.card_front);
View cardBack = findViewById(R.id.card_back);
FlipAnimation flipAnimation = new FlipAnimation(cardFace, cardBack);
if (cardFace.getVisibility() == View.GONE) {
mFlipCardLinearLayout.setVisibility(View.VISIBLE);
mCardFlippedButtons.setVisibility(View.GONE);
flipAnimation.reverse();
}else{
mFlipCardLinearLayout.setVisibility(View.GONE);
mCardFlippedButtons.setVisibility(View.VISIBLE);
}
cardContainer.startAnimation(flipAnimation);
}
private void saveCardStats(Integer numberPressed){
}
private void flingCardAway(){
final View cardContainer = findViewById(R.id.card_container);
ViewCompat.setTranslationZ(cardContainer, 1.0f);
AnimationSet anim = new AnimationSet(true);
RotateAnimation rotate1 = new RotateAnimation(0,-45, Animation.RELATIVE_TO_SELF,0.5f , Animation.RELATIVE_TO_SELF,0.5f );
rotate1.setStartOffset(100);
rotate1.setDuration(500);
anim.addAnimation(rotate1);
TranslateAnimation trans1 = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, -0.1f, Animation.RELATIVE_TO_PARENT, -0.1f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f);
trans1.setDuration(600);
anim.addAnimation(trans1);
AlphaAnimation opacity1 = new AlphaAnimation(1.0f, 0.0f);
opacity1.setDuration(400);
opacity1.setStartOffset(200);
anim.addAnimation(opacity1);
cardContainer.setAnimation(anim);
cardContainer.setVisibility(View.VISIBLE);
anim.setAnimationListener(new Animation.AnimationListener(){
#Override
public void onAnimationStart(Animation arg0) {
}
#Override
public void onAnimationRepeat(Animation arg0) {
}
#Override
public void onAnimationEnd(Animation arg0) {
final View cardContainer2 = findViewById(R.id.card_container);
((ViewGroup)cardContainer2.getParent()).removeView(cardContainer2);
}
});
}
private void resetForNewCard(){
mFlipCardLinearLayout.setVisibility(View.VISIBLE);
mCardFlippedButtons.setVisibility(View.GONE);
}
private void makeNewCard(){
FrameLayout cardFrame = (FrameLayout) findViewById(R.id.card_frame);
Integer childCount = cardFrame.getChildCount();
Log.d("Simple","childCount: "+childCount);
LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(R.layout.study_card, cardFrame);
}
}
FlipAnimation.java (not as important, just a reference)
package com.example.trevorwood.biggles.study;
import android.graphics.Camera;
import android.graphics.Matrix;
import android.view.View;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.view.animation.Animation;
import android.view.animation.Transformation;
public class FlipAnimation extends Animation {
private Camera camera;
private View fromView;
private View toView;
private float centerX;
private float centerY;
private boolean forward = true;
/**
* Creates a 3D flip animation between two views.
*
* #param fromView First view in the transition.
* #param toView Second view in the transition.
*/
public FlipAnimation(View fromView, View toView) {
this.fromView = fromView;
this.toView = toView;
setDuration(300);
setFillAfter(false);
setInterpolator(new AccelerateDecelerateInterpolator());
}
public void reverse() {
forward = false;
View switchView = toView;
toView = fromView;
fromView = switchView;
}
#Override
public void initialize(int width, int height, int parentWidth, int parentHeight) {
super.initialize(width, height, parentWidth, parentHeight);
centerX = width / 2;
centerY = height / 2;
camera = new Camera();
}
#Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
// Angle around the y-axis of the rotation at the given time
// calculated both in radians and degrees.
final double radians = Math.PI * interpolatedTime;
float degrees = (float) (180.0 * radians / Math.PI);
// Once we reach the midpoint in the animation, we need to hide the
// source view and show the destination view. We also need to change
// the angle by 180 degrees so that the destination does not come in
// flipped around
if (interpolatedTime >= 0.5f) {
degrees -= 180.f;
fromView.setVisibility(View.GONE);
toView.setVisibility(View.VISIBLE);
}
if (forward)
degrees = -degrees; //determines direction of rotation when flip begins
final Matrix matrix = t.getMatrix();
camera.save();
camera.translate(0, 0, Math.abs(degrees)*6);
camera.getMatrix(matrix);
camera.rotateY(degrees);
camera.getMatrix(matrix);
camera.restore();
matrix.preTranslate(-centerX, -centerY);
matrix.postTranslate(centerX, centerY);
}
}
I saw this, it helped but didn't solve my problem. End animation event android
I saw this too, but am not sure how to implement it into my own project. android animation is not finished in onAnimationEnd
The google docs all point to this link but this isn't reliable under rapid clicks.
This worked for me. Even though if you were to think about it, it probably shouldn't work. (It 100% would not work if converted to JavaScript, as the view is being removed before the animation has ended.) Perhaps somebody with more Android experience can explain why this works.
My hypothesis on why this works (please keep in mind, this is just a guess): is that Android's animations actually turn the view into something else entirely, while the original view is turned transparent. Then when the animation is ended, the animation view is deleted and the original view is turned back to visible.
private void flingCardAway(){
View cardContainer = findViewById(R.id.card_container);
ViewCompat.setTranslationZ(cardContainer, 1.0f);
AnimationSet anim = new AnimationSet(true);
RotateAnimation rotate1 = new RotateAnimation(0,-45, Animation.RELATIVE_TO_SELF,0.5f , Animation.RELATIVE_TO_SELF,0.5f );
rotate1.setStartOffset(10);
rotate1.setDuration(500);
anim.addAnimation(rotate1);
TranslateAnimation trans1 = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, -0.2f, Animation.RELATIVE_TO_PARENT, -0.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f);
trans1.setDuration(100);
anim.addAnimation(trans1);
TranslateAnimation trans2 = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, -0.1f, Animation.RELATIVE_TO_PARENT, -0.1f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f);
trans2.setStartOffset(100);
trans2.setDuration(100);
anim.addAnimation(trans2);
AlphaAnimation opacity1 = new AlphaAnimation(1.0f, 0.0f);
opacity1.setDuration(300);
opacity1.setStartOffset(300);
anim.addAnimation(opacity1);
cardContainer.setAnimation(anim);
mCardFrame.removeAllViews();
}
I'm trying to create a simple drawing app that allows you to draw on a canvas, and you're able to change the color and thickness of it. The problem that's occurring is that every time I try to change the color or thickness of the paint, it changes ALREADY existing paint that's on the canvas. I understand why it's not working, but I just don't know how to fix it and where exactly the problem lies.
CanvasView Class
package samkough.com.painter;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.MotionEvent;
import android.view.View;
import java.util.ArrayList;
public class CanvasView extends View
{
/*
* When the user touches the screen and moves their finger to draw,
* we will use a Path to trace their drawing action on the canvas.
* Both the canvas and the drawing on top of it are represented by Paint
* objects. The initial paint color corresponds to the first color
* in the palette we created last time, which will be initially selected
* when the app launches. Finally we declare variables for the canvas
* and bitmap - the user paths drawn with drawPaint will be drawn onto
* the canvas, which is drawn with canvasPaint.
* */
//drawing paint
private Paint paint = new Paint();
// canvas paint
private Paint canvasPaint = new Paint();
//drawing path
private Path path = new Path();
// canvas
private Canvas canvas = new Canvas();
//canvas bitmap
private Bitmap canvasBitmap;
// brush size and pixel size
private float brushSize, pixelAmount;
public CanvasView(Context context, AttributeSet attrs)
{
// Setting the anti-alias, stroke join and cap styles will make the user's drawings appear smoother.
super(context, attrs);
paint.setAntiAlias(true);
paint.setStrokeWidth(5);
paint.setColor(Color.BLACK);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeJoin(Paint.Join.ROUND);
paint.setStrokeCap(Paint.Cap.ROUND);
}
#Override
protected void onSizeChanged(int w, int h, int oldw, int oldh)
{
super.onSizeChanged(w, h, oldw, oldh);
canvasBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
canvas = new Canvas(canvasBitmap);
}
#Override
protected void onDraw(Canvas drawCanvas)
{
drawCanvas.drawBitmap(canvasBitmap, 0, 0, canvasPaint);
drawCanvas.drawPath(path, paint);
}
#Override
public boolean onTouchEvent(MotionEvent e)
{
// get the coords of the touch event
float eventX = e.getX();
float eventY = e.getY();
switch (e.getAction()) {
case MotionEvent.ACTION_DOWN:
// set a new starting point
path.moveTo(eventX, eventY);
path.reset();
path.moveTo(eventX, eventY);
return true;
case MotionEvent.ACTION_MOVE:
// connect the points
path.lineTo(eventX, eventY);
break;
default:
return false;
}
// makes you view repaint and call ondraw
invalidate();
return true;
}
public void clearCanvas()
{
path.reset();
invalidate();
}
public void setStrokeWidth(float f)
{
pixelAmount = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, f, getResources().getDisplayMetrics());
brushSize = pixelAmount;
paint.setAntiAlias(true);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeJoin(Paint.Join.ROUND);
paint.setStrokeCap(Paint.Cap.ROUND);
paint.setStrokeWidth(brushSize);
invalidate();
}
public void setColor(int p)
{
paint.setAntiAlias(true);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeJoin(Paint.Join.ROUND);
paint.setStrokeCap(Paint.Cap.ROUND);
paint.setColor(p);
invalidate();
}
}
MainActivity Class
package samkough.com.painter;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import com.samkough.painter.R;
public class MainActivity extends Activity {
private CanvasView canvasView;
private int orange;
private int purple;
private float strokeWidth;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
canvasView = (CanvasView) findViewById(R.id.canvasView);
orange = Color.rgb(250, 128, 0);
purple = Color.rgb(128, 0, 128);
strokeWidth = 0;
// REGULAR BUTTONS: save, about, reset
Button saveB = (Button) findViewById(R.id.saveButton);
Button aboutB = (Button) findViewById(R.id.aboutButton);
Button resetB = (Button) findViewById(R.id.resetButton);
// IMAGE BUTTONS: red, blue, green, yellow, black, purple, orange, erase, brush thickness plus, brush thickness minus
ImageButton redIb = (ImageButton) findViewById(R.id.redButton);
ImageButton blueIb = (ImageButton) findViewById(R.id.blueButton);
ImageButton greenIb = (ImageButton) findViewById(R.id.greenButton);
ImageButton yellowIb = (ImageButton) findViewById(R.id.yellowButton);
ImageButton blackIb = (ImageButton) findViewById(R.id.blackButton);
ImageButton purpleIb = (ImageButton) findViewById(R.id.purpleButton);
ImageButton orangeIb = (ImageButton) findViewById(R.id.orangeButton);
ImageButton eraseIb = (ImageButton) findViewById(R.id.eraseButton);
ImageButton plusIb = (ImageButton) findViewById(R.id.plusButton);
ImageButton minusIb = (ImageButton) findViewById(R.id.minusButton);
minusIb.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v)
{
strokeWidth -= 2;
canvasView.setStrokeWidth(strokeWidth);
}
});
plusIb.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
strokeWidth += 2;
canvasView.setStrokeWidth(strokeWidth);
}
});
eraseIb.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
canvasView.setColor(Color.TRANSPARENT);
}
});
orangeIb.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
canvasView.setColor(orange);
}
});
purpleIb.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
canvasView.setColor(purple);
}
});
blackIb.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
canvasView.setColor(Color.BLACK);
}
});
yellowIb.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
canvasView.setColor(Color.YELLOW);
}
});
greenIb.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
canvasView.setColor(Color.GREEN);
}
});
blueIb.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
canvasView.setColor(Color.BLUE);
}
});
redIb.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
canvasView.setColor(Color.RED);
}
});
saveB.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
}
});
aboutB.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(getApplicationContext(), AboutActivity.class);
startActivity(intent);
}
});
resetB.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
canvasView.clearCanvas();
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
You have created canvas, but you are not using that to draw anything on it. So essentially, the line drawCanvas.drawBitmap(canvasBitmap, 0, 0, canvasPaint); doesn't do anything.
What you need to do instead is draw the path on the canvas. Then draw the canvasBitmap using drawCanvas. This way you can maintain a single path and a single paint instead of multiple ones.
#Override
protected void onDraw(Canvas drawCanvas)
{
canvas.drawPath(path, paint);
drawCanvas.drawBitmap(canvasBitmap, 0, 0, canvasPaint);
}
When you do the above, each time the user draw's a new path, the canvasBitmap will hold all the old paths in it. So each time the onDraw is called, only the new path is drawn.
Always remember: It's a bad practice to create multiple PAINT objects. Try to reuse the Paint object as much as possible.
In CanvasView.java, this line
private Paint paint = new Paint();
declares one paint object for the whole class, and this line
private Path path = new Path();
declares one path object for the whole class.
When onDraw is called, your whole canvas area is being redrawn. That means that
drawCanvas.drawPath(path, paint);
is drawing the entire path that has been added since the activity was created with whatever the current value of paint is.
One way of working around this is to have a list of Path objects and a list of Paint objects. The first element of the Path list would store the first path that was drawn--say, everything drawn up until the point when they change paint. The first element of the paint list would store the corresponding paint that was used. Whenever the user changes the paint and begins painting, you'll need to create a new Path object, and add it and the new Paint object to the lists.
Once you have lists of the paths and the paints they were drawn with, you can do something like this in onDraw:
for (int i = 0; i < paths.size(); i++) {
Path path = paths.get(i);
Paint paint = paints.get(i);
drawCanvas.drawPath(path, paint);
}
I've created 2 separate projects in Android from tutorials etc., - one which runs an animation of an horse running, and the other a scrolling background. Both work well - but because they implement separate Activities, how do I manage to run both inside one project?? ie the animation of the horse on the top of the scrolling background?
Here is my code for the separate projects:
FrameAnimateActivity
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.os.Bundle;
import android.app.Activity;
import android.graphics.drawable.AnimationDrawable;
import android.view.Menu;
import android.view.animation.TranslateAnimation;
import android.widget.ImageView;
public class FrameAnimatedActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_frame_animated);
ImageView gyroView = (ImageView) findViewById(R.id.gyro);
//set the animation drawable as background
gyroView.setBackgroundResource(R.drawable.gyro_animation);
//create an animation drawable using the background
AnimationDrawable gyroAnimation = (AnimationDrawable) gyroView.getBackground();
//start the animation
gyroAnimation.start();
ImageView img_animation = (ImageView) findViewById(R.id.gyro);
TranslateAnimation animation = new TranslateAnimation(0.0f, 400.0f,
0.0f, 0.0f); // new TranslateAnimation(xFrom,xTo, yFrom,yTo)
animation.setDuration(5000); // animation duration
animation.setRepeatCount(5); // animation repeat count
animation.setRepeatMode(2); // repeat animation (left to right, right to left )
//animation.setFillAfter(true);
img_animation.startAnimation(animation); // start animation
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.frame_animated, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
And the code for the scrolling background:
MainActivity
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new MovingBackGround(this));
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
MovingBackground.java
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
public class MovingBackGround extends SurfaceView implements
SurfaceHolder.Callback {
private Bitmap backGround;
public MovingBackGround(Context context) {
super(context);
backGround = BitmapFactory.decodeResource(context.getResources(),
R.drawable.ab);
setWillNotDraw(false);
}
#Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
doDrawRunning(canvas);
invalidate();
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
/**
* Draws current state of the game Canvas.
*/
private int mBGFarMoveX = 0;
private int mBGNearMoveX = 0;
private void doDrawRunning(Canvas canvas) {
// decrement the far background
mBGFarMoveX = mBGFarMoveX - 1;
// decrement the near background
mBGNearMoveX = mBGNearMoveX - 4;
// calculate the wrap factor for matching image draw
int newFarX = backGround.getWidth() - (-mBGFarMoveX);
// if we have scrolled all the way, reset to start
if (newFarX <= 0) {
mBGFarMoveX = 0;
// only need one draw
canvas.drawBitmap(backGround, mBGFarMoveX, 0, null);
} else {
// need to draw original and wrap
canvas.drawBitmap(backGround, mBGFarMoveX, 0, null);
canvas.drawBitmap(backGround, newFarX, 0, null);
}
}
}
I need help regarding the viewpager. Basically I have a viewpager contained in a page container:
package com.example.CustomViews;
/**
* Created by imrankhan on 4/29/2015.
*/
import android.content.Context;
import android.graphics.Camera;
import android.graphics.Matrix;
import android.graphics.Point;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.view.animation.Transformation;
import android.widget.FrameLayout;
import android.widget.ImageView;
import com.example.imrankhan.newlawdojo.DashboardActivity;
import com.example.imrankhan.newlawdojo.QuizActivity;
import com.example.imrankhan.newlawdojo.R;
/**
* PagerContainer: A layout that displays a ViewPager with its children that are outside
* the typical pager bounds.
*/
public class PageContainer extends FrameLayout implements ViewPager.OnPageChangeListener {
private ViewPager mPager;
boolean mNeedsRedraw = false;
private Camera mCamera = new Camera();
private int mMaxRotationAngle = 60;
private int mMaxZoom = -120;
public PageContainer(Context context) {
super(context);
init();
}
public PageContainer(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public PageContainer(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
private void init() {
//Disable clipping of children so non-selected pages are visible
setClipChildren(false);
//Child clipping doesn't work with hardware acceleration in Android 3.x/4.x
//You need to set this value here if using hardware acceleration in an
// application targeted at these releases.
setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}
#Override
protected void onFinishInflate() {
try {
mPager = (ViewPager) getChildAt(0);
mPager.setOnPageChangeListener(this);
} catch (Exception e) {
throw new IllegalStateException("The root child of PagerContainer must be a ViewPager");
}
}
public ViewPager getViewPager() {
return mPager;
}
private Point mCenter = new Point();
private Point mInitialTouch = new Point();
#Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
mCenter.x = w / 4;
mCenter.y = h / 4;
}
#Override
public boolean onTouchEvent(MotionEvent ev) {
//We capture any touches not already handled by the ViewPager
// to implement scrolling from a touch outside the pager bounds.
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
mInitialTouch.x = (int)ev.getX();
mInitialTouch.y = (int)ev.getY();
default:
ev.offsetLocation(mCenter.x - mInitialTouch.x, mCenter.y - mInitialTouch.y);
break;
}
return mPager.dispatchTouchEvent(ev);
}
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
//Force the container to redraw on scrolling.
//Without this the outer pages render initially and then stay static
if (mNeedsRedraw) invalidate();
}
#Override
public void onPageSelected(int position) {
View v =this.getViewPager().getChildAt(position);
}
private void transformImageBitmap(View child, Transformation t, int rotationAngle) {
mCamera.save();
final Matrix imageMatrix = t.getMatrix();;
final int imageHeight = child.getLayoutParams().height;;
final int imageWidth = child.getLayoutParams().width;
final int rotation = Math.abs(rotationAngle);
mCamera.translate(0.0f, 0.0f, 100.0f);
if ( rotation < mMaxRotationAngle ) {
float zoomAmount = (float) (mMaxZoom + (rotation * 1.5));
mCamera.translate(0.0f, 0.0f, zoomAmount);
}
mCamera.rotateY(rotationAngle);
mCamera.getMatrix(imageMatrix);
imageMatrix.preTranslate(-(imageWidth/2), -(imageHeight/2));
imageMatrix.postTranslate((imageWidth/2), (imageHeight/2));
mCamera.restore();
}
#Override
public void onPageScrollStateChanged(int state) {
mNeedsRedraw = (state != ViewPager.SCROLL_STATE_IDLE);
}
}
on onPageSelected event I got the view I need to zoom in when selected and zoom out after selecting another item. Please help me out. I added an image to give you an idea what I want.
http://i.stack.imgur.com/xtE89.png
In my android application I have two .xaml layouts like activity_1 and activity_2 and I want to change these layout's activity through 2 swipeable tabs because after that i want to add more tabs: and below is my activity:
package com.example.hakslogin;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.PagerTitleStrip;
import android.support.v4.view.ViewPager;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.Toolbar;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import android.app.ActionBar;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.graphics.Color;
import android.view.View.OnClickListener;
public class LoginSuccess extends ActionBarActivity {
static final String LOG_TAG = "SlidingTabsBasicFragment";
private SlidingTabLayout mSlidingTabLayout;
private ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login_success);
Toolbar toolbar = (Toolbar) findViewById(R.id.my_awesome_toolbar);
mViewPager = (ViewPager) findViewById(R.id.viewpager);
mViewPager.setAdapter(new SamplePagerAdapter());
mSlidingTabLayout = (SlidingTabLayout) findViewById(R.id.sliding_tabs);
mSlidingTabLayout.setViewPager(mViewPager);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.login_success, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
class SamplePagerAdapter extends PagerAdapter {
/**
* #return the number of pages to display
*/
#Override
/* public int getCount() { //I am not using this method
return 5;
}*/
/**
* #return true if the value returned from
* {#link #instantiateItem(ViewGroup, int)} is the same object
* as the {#link View} added to the {#link ViewPager}.
*/
#Override
public boolean isViewFromObject(View view, Object o) {
return o == view;
}
#Override
/*public CharSequence getPageTitle(int position) { //I am not using this //method because I am giving name of tabs in SlidingTabLayout.java class
return pageTitle + " " + (position + 1);
}*/
// END_INCLUDE (pageradapter_getpagetitle)
/**
* Instantiate the {#link View} which should be displayed at
* {#code position}. Here we inflate a layout from the apps resources
* and then change the text view to signify the position.
*/
#Override
public Object instantiateItem(ViewGroup container, int position) {
// Inflate a new layout from our resources
View view = getLayoutInflater().inflate(R.layout.activity_login_success,
container, false);
container.addView(view);
// Retrieve a TextView from the inflated View, and update it's text
// --comment by me
//TextView title = (TextView) view.findViewById(R.id.item_title);
//title.setText(String.valueOf(position + 1));
Log.i(LOG_TAG, "instantiateItem() [position: " + position + "]");
return view;
}
/**
* Destroy the item from the {#link ViewPager}. In our case this is
* simply removing the {#link View}.
*/
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
Log.i(LOG_TAG, "destroyItem() [position: " + position + "]");
}
}
}
And I am doing above the same code into my another activity like below:
package com.example.hakslogin;
import com.example.android.common.view.SlidingTabLayout;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.Toolbar;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.graphics.Color;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TableRow;
import android.widget.TextView;
public class AddChildActivity extends ActionBarActivity {
static final String LOG_TAG = "SlidingTabsBasicFragment";
private SlidingTabLayout mSlidingTabLayout;
private ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_child);
Toolbar toolbar = (Toolbar) findViewById(R.id.my_awesome_toolbar);
mViewPager = (ViewPager) findViewById(R.id.viewpager);
mViewPager.setAdapter(new SamplePagerAdapter());
mSlidingTabLayout = (SlidingTabLayout) findViewById(R.id.sliding_tabs);
mSlidingTabLayout.setViewPager(mViewPager);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.add_child, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
class SamplePagerAdapter extends PagerAdapter {
/*#Override
public int getCount() {
return 5;
}*/
#Override
public boolean isViewFromObject(View view, Object o) {
return o == view;
}
/*#Override
public CharSequence getPageTitle(int position) {
return pageTitle + " " + (position + 1);
}*/
// END_INCLUDE (pageradapter_getpagetitle)
/**
* Instantiate the {#link View} which should be displayed at
* {#code position}. Here we inflate a layout from the apps resources
* and then change the text view to signify the position.
*/
#Override
public Object instantiateItem(ViewGroup container, int position) {
// Inflate a new layout from our resources
View view = getLayoutInflater().inflate(R.layout.activity_add_child,
container, false);
container.addView(view);
// Retrieve a TextView from the inflated View, and update it's text
// --comment by me
//TextView title = (TextView) view.findViewById(R.id.item_title);
//title.setText(String.valueOf(position + 1));
Log.i(LOG_TAG, "instantiateItem() [position: " + position + "]");
return view;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
Log.i(LOG_TAG, "destroyItem() [position: " + position + "]");
}
}
}
and below is SlidingTabLayout.java class:
package com.example.android.common.view;
import com.example.hakslogin.LoginSuccess;
import android.content.Context;
import android.graphics.Typeface;
import android.os.Build;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.HorizontalScrollView;
import android.widget.TextView;
public class SlidingTabLayout extends HorizontalScrollView {
/**
* Allows complete control over the colors drawn in the tab layout. Set with
* {#link #setCustomTabColorizer(TabColorizer)}.
*/
public interface TabColorizer {
/**
* #return return the color of the indicator used when {#code position} is selected.
*/
int getIndicatorColor(int position);
/**
* #return return the color of the divider drawn to the right of {#code position}.
*/
int getDividerColor(int position);
}
private static final int TITLE_OFFSET_DIPS = 24;
private static final int TAB_VIEW_PADDING_DIPS = 16;
private static final int TAB_VIEW_TEXT_SIZE_SP = 12;
private int mTitleOffset;
private int mTabViewLayoutId;
private int mTabViewTextViewId;
private ViewPager mViewPager;
private ViewPager.OnPageChangeListener mViewPagerPageChangeListener;
String value = "";
private final SlidingTabStrip mTabStrip;
// public SlidingTabLayout() {
// TODO Auto-generated constructor stub
//}
public SlidingTabLayout(Context context) {
this(context, null);
}
public SlidingTabLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public SlidingTabLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// Disable the Scroll Bar
setHorizontalScrollBarEnabled(false);
// Make sure that the Tab Strips fills this View
setFillViewport(true);
mTitleOffset = (int) (TITLE_OFFSET_DIPS * getResources().getDisplayMetrics().density);
mTabStrip = new SlidingTabStrip(context);
addView(mTabStrip, LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
}
/**
* Set the custom {#link TabColorizer} to be used.
*
* If you only require simple custmisation then you can use
* {#link #setSelectedIndicatorColors(int...)} and {#link #setDividerColors(int...)} to achieve
* similar effects.
*/
public void setCustomTabColorizer(TabColorizer tabColorizer) {
mTabStrip.setCustomTabColorizer(tabColorizer);
}
/**
* Sets the colors to be used for indicating the selected tab. These colors are treated as a
* circular array. Providing one color will mean that all tabs are indicated with the same color.
*/
public void setSelectedIndicatorColors(int... colors) {
mTabStrip.setSelectedIndicatorColors(colors);
}
/**
* Sets the colors to be used for tab dividers. These colors are treated as a circular array.
* Providing one color will mean that all tabs are indicated with the same color.
*/
public void setDividerColors(int... colors) {
mTabStrip.setDividerColors(colors);
}
/**
* Set the {#link ViewPager.OnPageChangeListener}. When using {#link SlidingTabLayout} you are
* required to set any {#link ViewPager.OnPageChangeListener} through this method. This is so
* that the layout can update it's scroll position correctly.
*
* #see ViewPager#setOnPageChangeListener(ViewPager.OnPageChangeListener)
*/
public void setOnPageChangeListener(ViewPager.OnPageChangeListener listener) {
mViewPagerPageChangeListener = listener;
}
/**
* Set the custom layout to be inflated for the tab views.
*
* #param layoutResId Layout id to be inflated
* #param textViewId id of the {#link TextView} in the inflated view
*/
public void setCustomTabView(int layoutResId, int textViewId) {
mTabViewLayoutId = layoutResId;
mTabViewTextViewId = textViewId;
}
/**
* Sets the associated view pager. Note that the assumption here is that the pager content
* (number of tabs and tab titles) does not change after this call has been made.
*/
public void setViewPager(ViewPager viewPager) {
mTabStrip.removeAllViews();
mViewPager = viewPager;
if (viewPager != null) {
viewPager.setOnPageChangeListener(new InternalViewPagerListener());
populateTabStrip();
}
}
/**
* Create a default view to be used for tabs. This is called if a custom tab view is not set via
* {#link #setCustomTabView(int, int)}.
*/
protected TextView createDefaultTabView(Context context) {
TextView textView = new TextView(context);
textView.setGravity(Gravity.CENTER);
textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, TAB_VIEW_TEXT_SIZE_SP);
textView.setTypeface(Typeface.DEFAULT_BOLD);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
// If we're running on Honeycomb or newer, then we can use the Theme's
// selectableItemBackground to ensure that the View has a pressed state
TypedValue outValue = new TypedValue();
getContext().getTheme().resolveAttribute(android.R.attr.selectableItemBackground,
outValue, true);
textView.setBackgroundResource(outValue.resourceId);
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
// If we're running on ICS or newer, enable all-caps to match the Action Bar tab style
//textView.setAllCaps(true);
//textView.setAllCaps(true);
}
int padding = (int) (TAB_VIEW_PADDING_DIPS * getResources().getDisplayMetrics().density);
textView.setPadding(padding, padding, padding, padding);
return textView;
}
String names[] = {"Home","Add Child"};//,"Add Item", "Questions", "Answer"};
int len = names.length;
private void populateTabStrip() {
final PagerAdapter adapter = mViewPager.getAdapter();
final View.OnClickListener tabClickListener = new TabClickListener();
for (int i = 0; i < names.length ; i++) {// i++) {;adapter.getCount()
View tabView = null;
TextView tabTitleView = null;
if (mTabViewLayoutId != 0) {
// If there is a custom tab view layout id set, try and inflate it
tabView = LayoutInflater.from(getContext()).inflate(mTabViewLayoutId, mTabStrip,
false);
tabTitleView = (TextView) tabView.findViewById(mTabViewTextViewId);
}
if (tabView == null) {
tabView = createDefaultTabView(getContext());
}
if (tabTitleView == null && TextView.class.isInstance(tabView)) {
tabTitleView = (TextView) tabView;
}
LoginSuccess.pageTitle = names[i].toString();
tabTitleView.setText(names[i].toString());//adapter.getPageTitle(i)
tabView.setOnClickListener(tabClickListener);
mTabStrip.addView(tabView);
}
}
#Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
if (mViewPager != null) {
scrollToTab(mViewPager.getCurrentItem(), 0);
}
}
private void scrollToTab(int tabIndex, int positionOffset) {
final int tabStripChildCount = mTabStrip.getChildCount();
if (tabStripChildCount == 0 || tabIndex < 0 || tabIndex >= tabStripChildCount) {
return;
}
View selectedChild = mTabStrip.getChildAt(tabIndex);
if (selectedChild != null) {
int targetScrollX = selectedChild.getLeft() + positionOffset;
if (tabIndex > 0 || positionOffset > 0) {
// If we're not at the first child and are mid-scroll, make sure we obey the offset
targetScrollX -= mTitleOffset;
}
scrollTo(targetScrollX, 0);
}
}
private class InternalViewPagerListener implements ViewPager.OnPageChangeListener {
private int mScrollState;
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
int tabStripChildCount = mTabStrip.getChildCount();
if ((tabStripChildCount == 0) || (position < 0) || (position >= tabStripChildCount)) {
return;
}
mTabStrip.onViewPagerPageChanged(position, positionOffset);
View selectedTitle = mTabStrip.getChildAt(position);
int extraOffset = (selectedTitle != null)
? (int) (positionOffset * selectedTitle.getWidth())
: 0;
scrollToTab(position, extraOffset);
if (mViewPagerPageChangeListener != null) {
mViewPagerPageChangeListener.onPageScrolled(position, positionOffset,
positionOffsetPixels);
}
}
#Override
public void onPageScrollStateChanged(int state) {
mScrollState = state;
if (mViewPagerPageChangeListener != null) {
mViewPagerPageChangeListener.onPageScrollStateChanged(state);
}
}
#Override
public void onPageSelected(int position) {
if (mScrollState == ViewPager.SCROLL_STATE_IDLE) {
mTabStrip.onViewPagerPageChanged(position, 0f);
scrollToTab(position, 0);
}
if (mViewPagerPageChangeListener != null) {
mViewPagerPageChangeListener.onPageSelected(position);
}
}
}
private class TabClickListener implements View.OnClickListener {
#Override
public void onClick(View v) {
for (int i = 0; i < mTabStrip.getChildCount(); i++) {
if (v == mTabStrip.getChildAt(i)) {
mViewPager.setCurrentItem(i);
return;
}
}
}
}
}
I am using this link, and its show me two tabs on any first activity but the problem is that its show layout multiple times one on my activity layout and on sliding page layout, Kindly suggest me what can I handle it, waiting for reply Thanks.