This is the oncreate from my application.
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
getWindow().setFormat(PixelFormat.UNKNOWN);
surfaceView = (SurfaceView)findViewById(R.id.camerapreview);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
controlInflater = LayoutInflater.from(getBaseContext());
View viewControl = controlInflater.inflate(R.layout.control, null);
//ImageView img = (ImageView)controlInflater.
LayoutParams layoutParamsControl
= new LayoutParams(LayoutParams.FILL_PARENT,
LayoutParams.FILL_PARENT);
this.addContentView(viewControl, layoutParamsControl);
}
control.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
>
<ImageView
android:id="#+id/img"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/ic_launcher"
/>
</LinearLayout>
how to reference the ImageView in control.xml from java code.
View viewControl = controlInflater.inflate(R.layout.control, null);
ImageView img =(ImageView) viewControl.findViewById(R.id.img);
use this to get reference to imageView.
There is a findViewById method in View as well:
ImageView img = (ImageView)viewControl.findViewById(R.id.img)
Related
In my app a user can select multiple images from gallery then he can view it within the app.
I have three buttons within a Relative Layout
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.codenemesis.multipleimg.MainActivity">
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="imageSelector"
<Button
android:id="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="up"
android:text="Upload"/>
<Button
android:id="#+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="viewclick"
android:text="View Images" />
To show the images I programmatically created ImageView array within HorizontalScrollView set to WRAP_CONTENT but the problem is when I click on view button HorizontalScrollView span over the whole screen like this.
I want to show HorizontalScrollView below view button. How can I do it?
Here is how I created HorizontalScrollView
HorizontalScrollView horizontalScrollView = new HorizontalScrollView(this);
LinearLayout linearLayout = new LinearLayout(this);
ViewGroup.LayoutParams prams = new ViewGroup.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
linearLayout.setLayoutParams(prams);
linearLayout.setOrientation(LinearLayout.HORIZONTAL);
horizontalScrollView.addView(linearLayout);
// mArrayUri is the arraylist of images selected from gallery
int b = mArrayUri.size();
int c = 0;
ImageView[] imageViews = new ImageView[mArrayUri.size()];
while (c < mArrayUri.size()) {
imageViews[c] = new ImageView(this);
imageViews[c].setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT));
imageViews[c].setPadding(10,0,10,0);
imageViews[c].setImageURI(mArrayUri.get(c));
linearLayout.addView(imageViews[c]);
c++;
// Set context view
setContentView(horizontalScrollView);
The code in your xml file should be like this
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.test.myapplication.MainActivity">
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="select images"
android:onClick="imageSelector"/>
<Button
android:id="#+id/button2"
android:layout_toRightOf="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="up"
android:text="Upload"/>
<Button
android:id="#+id/button3"
android:layout_toRightOf="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="viewclick"
android:text="View Images" />
<RelativeLayout
android:id="#+id/parent_panel"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/button"
android:layout_marginTop="10dp"
>
</RelativeLayout>
The code in you java file should be like this
public class MainActivity extends AppCompatActivity {
RelativeLayout relativeLayout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
relativeLayout=findViewById(R.id.parent_panel);
}
public void imageSelector(View view)
{
}
public void up(View view)
{
}
public void viewclick(View view)
{
HorizontalScrollView horizontalScrollView =
new HorizontalScrollView(this);
LinearLayout linearLayout = new LinearLayout(this);
ViewGroup.LayoutParams prams = new ViewGroup.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
linearLayout.setLayoutParams(prams);
linearLayout.setOrientation(LinearLayout.HORIZONTAL);
horizontalScrollView.addView(linearLayout);
// mArrayUri is the arraylist of images selected from gallery
int b = mArrayUri.size();
int c = 0;
ImageView[] imageViews = new ImageView[mArrayUri.size()];
while (c < mArrayUri.size()) {
imageViews[c] = new ImageView(this);
imageViews[c].setLayoutParams(new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT));
imageViews[c].setPadding(10, 0, 10, 0);
imageViews[c].setImageURI(mArrayUri.get(c));
linearLayout.addView(imageViews[c]);
c++;
}
relativeLayout.addView(horizontalScrollView);
}
}
This should do the trick for you.
I am trying to add my textView to my app programmatically, but it doesn't appear when I run it.I put a button in the XML to test the relativeLayout and it appears fine, but the textView doesn't so I'm putting down to code? my code is below. Thanks in advance!
#Override
public void onResponse(String response) {
StringX = response;
Log.e("RESPONSE", response);
TextView valueTV = new TextView(getBaseContext());
valueTV.setText("Hello!");
valueTV.setTextSize(20);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT);
valueTV.setLayoutParams(params);
valueTV.setTextColor(Color.argb(1, 0, 95, 0));
valueTV.setId(0);
scrollerF.addView(valueTV);
}
And my layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.garethpower92.tourlink_ireland.coupons">
<ScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:paddingTop="70dp"
android:background="#FFFFFF"
android:id="#+id/scrollerMain"
android:layout_below="#+id/textView"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:fillViewport="false">
<RelativeLayout
android:id="#+id/rlX"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
</RelativeLayout>
</ScrollView>
<TextView
android:layout_width="fill_parent"
android:layout_height="70dp"
android:text="Discounts"
android:id="#+id/textView"
android:textColor="#FFFFFF"
android:textSize="40sp"
android:background="#009500"
android:textAlignment="center"
android:paddingTop="10sp"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true" />
</RelativeLayout>
Below code works for me,
In your activity onCreate method add this code:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView mTextv = new TextView(getApplicationContext());
mTextv.setText("This is Text....!!");
mTextv.setGravity(Gravity.CENTER_VERTICAL);
linearLayout = (LinearLayout) findViewById(R.id.lLayout);
mTextv.setTextSize(20);
mTextv.setTypeface(Typeface.MONOSPACE);
mTextv.setTextColor(Color.parseColor("#454045"));
linearLayout.addView(mTextv);
}
Linear layout is the parent layout of TextView you'll add dynamically, so ad textview as child view in linearLayout object.
try this.
TextView valueTV = new TextView(scrollerF.getContext());
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT);
valueTV.setLayoutParams(params.addRule(RelativeLayout.CENTER_IN_PARENT));
valueTV.setText("Hello!");
valueTV.setTextSize(20);
scrollerF.addView(valueTV);
scrollerF.invalidate();
I want to put three images on a vertical scroll view, I don't know why, but I just see the third one ( tuto3 ).
here is the xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/scrollView" >
<LinearLayout
android:id="#+id/linearLayout42"
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
</LinearLayout>
</ScrollView>
</LinearLayout>
And there the class:
public class about extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.aboutlayout);
LinearLayout ll = (LinearLayout) findViewById(R.id.linearLayout42);
ImageView image = new ImageView(about.this);
image.setBackgroundResource(R.drawable.tuto1);
ll.addView(image);
ImageView image2 = new ImageView(about.this);
image.setBackgroundResource(R.drawable.tuto2);
ll.addView(image2);
ImageView image3 = new ImageView(about.this);
image.setBackgroundResource(R.drawable.tuto3);
ll.addView(image3);
}
}
You keep calling setBackgroundResource on image instead of image, image1, and image2.
I'm trying to add Imageviews dynamically and
I would like to create this kind of layout, with ImageViews overlapping, for
my android application.
I don't know how to set the overlapping in java code. I want to use java code becouse I'm adding Imageview dynamically!
this is the code that I did:
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:id="#+id/frame1">
</RelativeLayout>
and this is my java code:
RelativeLayout layout = (RelativeLayout) findViewById(R.id.frame1);
RelativeLayout.LayoutParams params1 = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);
mImageView = new ImageView (this);
mImageView.setId(1);
name = "0" + ".jpg";
Bitmap bitmap = BitmapFactory.decodeFile(url_image+name);
params1.addRule(RelativeLayout.ALIGN_PARENT_TOP,1);
params1.addRule(RelativeLayout.ALIGN_PARENT_LEFT,1);
params1.addRule(RelativeLayout.ALIGN_PARENT_START,1);
params1.addRule(RelativeLayout.ALIGN_TOP,1);
mImageView.setImageBitmap(bitmap);
layout.addView(mImageView,params1);
for (int i = 1;i < num_max; i++){
mImageView = new ImageView (this);
mImageView.setId(i+1);
name = String.valueOf(i) + ".jpg";
int id = mImageView.getId() - 1 ;
bitmap = BitmapFactory.decodeFile(url_image+name);
mImageView.setImageBitmap(bitmap);
RelativeLayout.LayoutParams params2 = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);
params2.addRule(RelativeLayout.BELOW,id);
params2.addRule(RelativeLayout.ALIGN_START,id);
params2.addRule(RelativeLayout.ALIGN_LEFT,id);
layout.addView(mImageView,params2);
}
If you want to images overlapping each other(as i understood from your question) you should remove this line :
params2.addRule(RelativeLayout.BELOW,id);
If you wanted something else feel free to post comment below this answer
Use relative layout for it
use this code
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ImageView
android:id="#+id/iv"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<ImageView
android:id="#+id/iv_2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="#+id/iv"
/>
</RelativeLayout>
Following is the example of how to achieve it.
MainActivity.Java
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
RelativeLayout layout = (RelativeLayout) findViewById(R.id.frame1);
//Add first image view
ImageView mImageView = new ImageView (this);
mImageView.setId(1);
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.color1);
RelativeLayout.LayoutParams params1 = new RelativeLayout.LayoutParams(300, 300);
mImageView.setImageBitmap(bitmap);
layout.addView(mImageView,params1);
//Add second image view
ImageView mImageView2 = new ImageView (this);
mImageView2.setId(2);
Bitmap bitmap2 = BitmapFactory.decodeResource(getResources(), R.drawable.color2);
mImageView2.setImageBitmap(bitmap2);
RelativeLayout.LayoutParams params2 = new RelativeLayout.LayoutParams(300,300);
params2.setMargins(150, 150, 0, 0);
layout.addView(mImageView2,params2);
}
}
activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.sample.MainActivity" >
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:id="#+id/frame1">
</RelativeLayout>
</RelativeLayout>
Output Screenshot:
Required Images:
I'm trying to have an image show up when the name of it (TextVIew) is clicked. I have the code set up to what I believe is the right thing but the app force closes when I launch it. This is just a test code, so its not my actual app, but the idea is the same so can someone help me figure out why this is crashing?
java file:
TextView text = (TextView) findViewById(R.id.text);
ImageView image = (ImageView) findViewById(R.id.image);
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
text.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
image.getLayoutParams().height=20;
}
});
}
xml file:
<ImageView
android:id="#+id/image"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:gravity="center"
android:src="#drawable/ic_launcher" />
<TextView
android:id="#+id/text"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:clickable="true"
android:text="show image" />
You have to have this code (below) inside onCreate()
TextView text = (TextView) findViewById(R.id.text);
ImageView image = (ImageView) findViewById(R.id.image);
Try it.
Update:
The code could look like this:
public class MainActivity extends Activity {
ImageView image = null;
TextView text = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
text = (TextView) findViewById(R.id.text);
image = (ImageView) findViewById(R.id.image);
text.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (image.getVisibility() == View.GONE) {
image.setVisibility(View.VISIBLE);
text.setText("hide the image");
} else {
image.setVisibility(View.GONE);
text.setText("show the image");
}
}
});
}
}
and layout is here:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical" >
<ImageView
android:id="#+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_launcher"
android:visibility="gone" />
<TextView
android:id="#+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="show the image" />
</LinearLayout>
Fill your elements in onCreate, not as a field, after setting the content view;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView text = (TextView) findViewById(R.id.text);
ImageView image = (ImageView) findViewById(R.id.image);
...
And try setting the size of the ImageView not directly from layoutparams but with setHeight/setWidth functions