I'm trying to make an app that draws a circle on a bitmap. Right now, I have a button that produces the circle. Instead, I would like to draw the circle where the user double-taps (instead of pressing a button). How can I do this programmatically? Here is the content of the activity so far:
public static final String KEY_PATH = "img.jpg";
private ZoomInZoomOut touch;
private Bitmap bitmap;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_image_display);
Intent intent = getIntent();
String path = getIntent().getStringExtra(ImageDisplayActivity.KEY_PATH);
try {
java.io.FileInputStream in = this.openFileInput(path);
bitmap = BitmapFactory.decodeStream(in);
bitmap = bitmap.copy(bitmap.getConfig(), true);
touch = (ZoomInZoomOut)findViewById(R.id.IMAGEID);
touch = arrangeImageView(touch);
touch.setImageBitmap(bitmap);
in.close();
Button draw = (Button) findViewById(R.id.draw);
draw.setOnClickListener(new View.OnClickListener(){
public void onClick(View v)
{
Bitmap bmOverlay = Bitmap.createBitmap(bitmap.getWidth(),
bitmap.getHeight(),
bitmap.getConfig());
Canvas canvas = new Canvas(bmOverlay);
Paint p = new Paint();
p.setAntiAlias(true);
p.setColor(Color.BLUE);
p.setStrokeWidth(2);
p.setStyle(Paint.Style.STROKE);
canvas.drawBitmap(bitmap,new Matrix(),null);
canvas.drawCircle(1000, 1000, 20, p);
touch.setImageBitmap(bmOverlay);
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
You have to implement GestureDetector and put your code in single/double click. Here you can replace button with bitmap.
TestActivity.java
iv.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
//putyour first activity call.
}
}
iv.setOnTouchListener(new OnTouchListener() {
GestureDetector gestureDetector = new GestureDetector(new MyGestureDetector(context));
#Override
public boolean onTouch(View v, MotionEvent event) {
return gestureDetector.onTouchEvent(event);
}
});
Now you have to create GestureDetector.java class.
public class MyGestureDetector extends SimpleOnGestureListener {
public Context context;
public String phno;
public MyGestureDetector(Context con)
{
this.context=con;
}
#Override
public boolean onDown(MotionEvent e) {
return super.onDown(e);
}
public MyGestureDetector(Context con) {
this.context=con;
}
#Override
public boolean onDoubleTap(MotionEvent e) {
System.out.println("in Double tap");
return true;
}
#Override
public boolean onSingleTapUp(MotionEvent e) {
System.out.println("in single tap up");
//put your second activity.
return super.onSingleTapUp(e);
}
}
Related
I am trying to fade in a TextureView but for some reason its not animating. It just simply pops in the video, no fade at all and i dont really know why that is because after some research i have found that TextureView can be animated normally.
Here is my code, i hope you guys can give me a pointer in the right direction.
PS, i have left out all irrelevant code that does not concern itself with the textureview and the animation.
public class MainActivity extends AppCompatActivity implements MediaPlayer.OnPreparedListener, MediaPlayer.OnCompletionListener
{
private static final String TAG = MainActivity.class.getSimpleName();
private MediaPlayer mediaPlayer1;
private ArrayList<Uri> videoUris = new ArrayList<>();
private int current_video_index = 0;
private TextureView textureView;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textureView = (TextureView) findViewById(R.id.textureView);
mediaPlayer1 = new MediaPlayer();
mediaPlayer1.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer1.setOnPreparedListener(this);
mediaPlayer1.setOnCompletionListener(this);
initVideoUris();
initNewVideo();
}
private void startVideo(final Uri uri)
{
textureView.setSurfaceTextureListener(new TextureView.SurfaceTextureListener()
{
#Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height)
{
try {
mediaPlayer1.setDataSource(MainActivity.this, uri);
mediaPlayer1.setSurface(new Surface(surface));
mediaPlayer1.setOnCompletionListener(MainActivity.this);
mediaPlayer1.setOnPreparedListener(MainActivity.this);
mediaPlayer1.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer1.prepareAsync();
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height)
{
}
#Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface)
{
return false;
}
#Override
public void onSurfaceTextureUpdated(SurfaceTexture surface)
{
}
});
}
#Override
public void onPrepared(MediaPlayer mp)
{
mp.start();
fadeInView(textureView);
}
#Override
public void onCompletion(MediaPlayer mp)
{
if (!moreVideosAvailable())
{
finish();
}
}
private boolean moreVideosAvailable()
{
return current_video_index < videoUris.size();
}
private void fadeInView(View view)
{
view.setAlpha(0f);
view.setVisibility(View.VISIBLE);
view.animate().alpha(1f).setDuration(2000).setListener(null).start();
}
}
I solved it by making a videoPlayerFragment that uses TextureView as the surface for displaying the video. Then simply animate the whole fragment instead of the textureView.
This code shows nothing on my screen when run. I need to draw a simple circle wherever you touch.
public class Touchevent extends AppCompatActivity {
float mLastTouchX = 0;
float mLastTouchY = 0;
Canvas zex=new Canvas();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_touchevent);
RelativeLayout mylayout = (RelativeLayout)findViewById(R.id.test);
mylayout.setOnTouchListener(
new RelativeLayout.OnTouchListener() {
public boolean onTouch(View v, MotionEvent m) {
onTouchEvent(m);
onDraw(zex);
return true;
}
}
);
}
public void onDraw(Canvas canvasx) {
canvasx.drawColor(Color.WHITE);
Paint paint = new Paint();
paint.setColor(Color.BLUE);
canvasx.drawCircle(mLastTouchX,mLastTouchY,100,paint);
}
#Override
public boolean onTouchEvent(MotionEvent ev) {
mLastTouchX = ev.getX();
mLastTouchY = ev.getY();
return true;
}
}
The code shows no error. Do I need to add a custom view? Then how to implement a click listener?
#Override
protected Bitmap doInBackground(String... imageurl)
{
try {
URL url = new URL(imageurl[0]);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.connect();
InputStream in = urlConnection.getInputStream();
bitmap = BitmapFactory.decodeStream(in);
return bitmap;
}catch (Exception e)
{
e.printStackTrace();
return null;
}
}
#Override
protected void onPostExecute(Bitmap result) {
super.onPostExecute(result);
if(result!=null && imageReference!=null) {
ImageView imgview = (ImageView) imageReference.get();
if (imgview != null) {
imgview.setImageBitmap(bitmap);
}
}
}
}
#Override
public void onBindViewHolder(MyViewHolder holder, int position) {
ItemData current=data.get(position);
try {
Mytask mytask=new Mytask(holder.getImageview());
mytask.execute(current.imageUrl);
} catch (Exception e) {
e.printStackTrace();
}
}
public void setClickListener(ClickListener clickListener)
{
this.clickListener=clickListener;
Bundle extras=new Bundle();
extras.putParcelable("image",bitmap);
}
#Override
public int getItemCount() {
return data.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
ImageView icon;
public MyViewHolder(View itemView) {
super(itemView);
itemView.setOnClickListener(this);
icon=(ImageView)itemView.findViewById(R.id.item_icon);
}
public ImageView getImageview()
{
return icon;
}
public void onClick(View view)
{
if(clickListener!=null)
{
clickListener.itemClicked(view,getAdapterPosition());
}
}
}
public interface ClickListener{
public void itemClicked(View view,int position);
}
The above is the MyAdapter method. I want to pass the value of the bitmap to another activity in order to display the onItemClicked image from the RecyclerView list into another activity. My another question is that do I need to pass the intent stuff in my MainActivity's class method in
#override
Public void itemClickedmethod(View view,int position) {
Bundle extras=new bundle();
and so. .the intent stuff. or somewhere else. Please help.
Bitmap implements Parcelable, so you could always pass it in the intent:
Intent intent = new Intent(this, NewActivity.class);
intent.putExtra("BitmapImage", bitmap);
and retrieve it on the other end:
Intent intent = getIntent();
Bitmap bitmap = (Bitmap) intent.getParcelableExtra("BitmapImage");
Taken from the answer given here
EDIT 1
Bitmap bitmap = ((BitmapDrawable)image.getDrawable()).getBitmap();
use that to get the bitmap attached to an ImageView. (image is the imageview)
try with this code this code is working :-
imageUrl = "nameofimagefile or path of image at server side"
new LoadImage().execute(imageUrl);
// then
private class LoadImage extends AsyncTask<String, String, Bitmap> {
#Override
protected void onPreExecute() {
super.onPreExecute();
//pDialog = new ProgressDialog(getActivity());
//pDialog.setMessage("Loading Image ....");
//pDialog.show();
}
protected Bitmap doInBackground(String... args) {
try {
bitmap = BitmapFactory.decodeStream((InputStream) new URL(
args[0]).getContent());
System.out.println("======" + bitmap);
} catch (Exception e) {
e.printStackTrace();
}
return bitmap;
}
protected void onPostExecute(Bitmap image) {
if (image != null) {
imgCompLogo.setImageBitmap(image);
//pDialog.dismiss();
} else {
//pDialog.dismiss();
}
}
}
I want to create a slideshow of images in which I want to repeat 5 images to come in a loop until a button is pressed. Also I want some effect in between the images so that the transition looks nice. I am able to create a slideshow, but the problem is that its not repeating.
here is my code:
public class Slides extends Activity implements OnClickListener {
Button button;
Boolean goingOn = false;
AnimationDrawable animation;
private TransitionDrawable trans;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.discolight);
final ImageView lights = (ImageView) findViewById(R.id.img);
button=(Button)findViewById(R.id.power);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(goingOn)
{
stopAnimation();
goingOn=false;
}
else
{
startAnimation();
goingOn=true;
}
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu m) {
MenuInflater inf = getMenuInflater();
inf.inflate(R.menu.frontscreenmenu, m);
return true;
}
class Starter implements Runnable {
public void run() {
animation.start();
}
}
private void startAnimation() {
animation = new AnimationDrawable();
animation.addFrame(getResources().getDrawable(R.drawable.a), 1000);
animation.addFrame(getResources().getDrawable(R.drawable.b), 1000);
animation.addFrame(getResources().getDrawable(R.drawable.c), 1000);
animation.addFrame(getResources().getDrawable(R.drawable.d), 1000);
animation.addFrame(getResources().getDrawable(R.drawable.e), 1000);
animation.addFrame(getResources().getDrawable(R.drawable.f), 1000);
animation.addFrame(getResources().getDrawable(R.drawable.g), 1000);
animation.addFrame(getResources().getDrawable(R.drawable.h), 1000);
animation.addFrame(getResources().getDrawable(R.drawable.i), 1000);
animation.addFrame(getResources().getDrawable(R.drawable.j), 1000);
animation.setOneShot(true);
ImageView imageView = (ImageView) findViewById(R.id.img);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
600, 800);
params.alignWithParent = true;
params.addRule(RelativeLayout.CENTER_IN_PARENT);
imageView.setLayoutParams(params);
imageView.setImageDrawable(animation);
imageView.post(new Starter());
}
private void stopAnimation() {
animation.stop();
}
Use The FrameAnimation for this
and add frameanimatin.setOneShot(false);
been working on a prject for a while, now I want it so that when the user touches the screen it changes the color of the textView(DigitalClock). I'm a bit of a noob when it comes to java so I really need a fully working example if possible? Here's my code so far:
public class MainActivity extends Activity {
private static final Random RANDOM = new Random();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
setContentView(R.layout.activity_main);
Handler handler = new RandomMoveHandler((TextView) findViewById(R.id.digitalClock1));
handler.sendEmptyMessage(0);
}
private static class RandomMoveHandler extends Handler {
private final WeakReference<TextView> textViewWeakReference;
private RandomMoveHandler(TextView textView) {
this.textViewWeakReference = new WeakReference<TextView>(textView);
}
#Override
public void handleMessage(Message msg) {
TextView textView = textViewWeakReference.get();
if (textView == null) {
Log.i(TAG, "WeakReference is gone so giving up.");
return;
}
int x = RANDOM.nextInt(670 - 100);
int y = RANDOM.nextInt(1230 - 100);
Log.i(TAG, String.format("Moving text view to (%d, %d)", x, y));
textView.setX(x);
textView.setY(y);
//change the text position here
this.sendEmptyMessageDelayed(0, 30000);
}
}
textView.setOnTouchListener(new OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
// use any of your own colors here...
textView.setTextColor(android.R.color.holo_purple);
return true;
}
});
See also https://developer.android.com/reference/android/widget/TextView.html#setTextColor(int)