Develop Reference

Add View into RecyclerView

I tried to add view into RecyclerView when click to Button in a ViewHolder.
When click to Button in ViewHolder3, a View (view add more) will add and appear like image above.
ViewAddMore will pin there and RecyclerView can scroll normal.
I tried but don't found any solution for my issue;
Have any suggest for my issue?

Please use PopupWindow to show this View.
// get a reference to the already created main layout
LinearLayout mainLayout = (LinearLayout) findViewById(R.id.activity_main_layout);
// inflate the layout of the popup window
LayoutInflater inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
View popupView = inflater.inflate(R.layout.popup_window, null);
// create the popup window
int width = LinearLayout.LayoutParams.WRAP_CONTENT;
int height = LinearLayout.LayoutParams.WRAP_CONTENT;
boolean focusable = true; // lets taps outside the popup also dismiss it
final PopupWindow popupWindow = new PopupWindow(popupView, width, height, focusable);
// show the popup window
popupWindow.showAtLocation(mainLayout, Gravity.CENTER, 0, 0);
// dismiss the popup window when touched
popupView.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
popupWindow.dismiss();
return true;
}
});
https://developer.android.com/reference/android/widget/PopupWindow.html
How to make a simple android popup window?
Hope this will help you.

Programmatically Add Toolbar to RelativeView in Android

I am very new to android development and I am trying to learn how to add a Toolbar to a relative view programmatically. Essentially, I am trying to do the Blank project template in code instead of using the XML based approach. My application will launch but all I see is the TextView I have added and do not see Toolbar or Menu inflated and place on the toolbar at the top of the screen. Here is the code I have thus far:
public class MainActivity extends AppCompatActivity {
private RelativeLayout relativeLayout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Create the relative layout programmatically
createRelativeLayout();
// Set the content view with the instantiated relative layout
setContentView(this.relativeLayout);
// Create and add the action bar
setSupportActionBar(createToolbar());
// Create a text view and add it
this.relativeLayout.addView(createTextView());
}
private void createRelativeLayout() {
relativeLayout = new RelativeLayout(this);
// Specifies the layout properties
RelativeLayout.LayoutParams relativeParams = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.MATCH_PARENT,
RelativeLayout.LayoutParams.MATCH_PARENT
);
relativeLayout.setLayoutParams(relativeParams);
}
private TextView createTextView() {
TextView textView = new TextView(this);
// Set initial layout parameters
RelativeLayout.LayoutParams textViewParams = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT
);
// Set alignment parameters
textViewParams.addRule(RelativeLayout.ALIGN_PARENT_TOP);
textViewParams.addRule(RelativeLayout.CENTER_HORIZONTAL);
textViewParams.setMargins(0, 82, 0, 0);
textView.setText(R.string.app_name);
textView.setLayoutParams(textViewParams);
return textView;
}
private Toolbar createToolbar() {
Toolbar toolbar = new Toolbar(this);
Toolbar.LayoutParams toolBarParams = new Toolbar.LayoutParams(
Toolbar.LayoutParams.MATCH_PARENT,
R.attr.actionBarSize
);
toolbar.setLayoutParams(toolBarParams);
toolbar.setBackgroundColor(Color.BLUE);
toolbar.setPopupTheme(R.style.AppTheme_PopupOverlay);
toolbar.setVisibility(View.VISIBLE);
return toolbar;
}
#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);
}
}
Any help is greatly appreciated, thanks.

SHORT ANSWER: You should use RelativeLayout.LayoutParams when adding view to RelativeLayout
You have assigned a Toolbar.LayoutParams as layout params to your toolbar, it won't work unless you assign a RelativeLayout.LayoutParams to your toolbar.
In android view inflation, the layout param of each child view should be set according to it's parent. if your toolbar was for example in a LinearLayout you should've used 'LinearLayout.LayoutParams' as your toolbar's layout params.

One view exclude another when a drop occurs

I've been struggling on the last couple of days with this program. The issue that I'm facing is about a drop event of a view which excludes another view. What the program is supposed to do is, on a click of a button, creates as many ImageButtons and they all can be dragged and dropped anywhere on the screen. However, he creates the first view and creates the second, but when I drag the second ImageButton, the first one created is deleted from the screen.
Here is the 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"
android:id="#+id/relative_main"
tools:context=".WhyItActivity" >
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="add button"
android:onClick="addButton" />
</RelativeLayout>
Below is the java activity responsible
public class WhyItActivity extends Activity {
private RelativeLayout relative;
private LayoutParams params;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_why_it);
params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
relative = (RelativeLayout)findViewById(R.id.relative_main);
// all the screen be a dropping area
relative.setOnDragListener(new View.OnDragListener() {
#Override
public boolean onDrag(View view, DragEvent event) {
View dragView = (View) event.getLocalState();
RelativeLayout layout = (RelativeLayout) view;
switch (event.getAction()) {
case DragEvent.ACTION_DRAG_STARTED:
break;
case DragEvent.ACTION_DRAG_ENTERED:
break;
case DragEvent.ACTION_DRAG_EXITED:
break;
case DragEvent.ACTION_DROP:
int right = (int)event.getX();
int top = (int)event.getY();
params.setMargins(right, top, 0, 0);
layout.removeView(dragView);
layout.addView(dragView, params);
// set back the visibility
dragView.setVisibility(View.VISIBLE);
break;
case DragEvent.ACTION_DRAG_ENDED:
break;
default:
break;
}
return true;
}
});
}
/** OnClick */
public void addButton(View v){
// params for centralizing the image button
LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.CENTER_IN_PARENT);
// new object
ImageButton imgBtn = new ImageButton(this);
imgBtn.setImageDrawable(getResources().getDrawable(R.drawable.ic_launcher));
relative.addView(imgBtn, params);
// letting the view be dragged around the screen
imgBtn.setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View view) {
ClipData data = ClipData.newPlainText("", "");
DragShadowBuilder builder = new View.DragShadowBuilder(view);
view.startDrag(data, builder, view, 0);
// let the view be invisible while dragging the object
view.setVisibility(View.INVISIBLE);
return true;
}
});
}
So, the question is... Where I'm screwing? I create a new object, if it's was a matter of just one view on the screen it would be working just fine.
Thanks for reading so far, and possibly be able to help.

One silly but critical mistake.
Add this line
params = params = new LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
Above
params.setMargins(right, top, 0, 0);
As u can see there is only one instance of LayoutParam you have been assigning to all your views, thus ending up in stack of views.
Please mark as accepted if resolved. Thanks.

How do I position ZoomButtonsController in custom ImageView?

Layouting in Android is getting me rather perplexed.
I'm slowly implementing a custom ImageView where I'd like to make use of the ZoomButtonsController.
However, I would like to decide where the zoom buttons go in the layout and I can't figure out how to move them from the default bottom center position.
I have been experimenting with layouting simple views such as buttons in the main activity and this seems to be working as I would guess and expect.
In the case of the ZoomButtonsController I would however like to reposition them. I'm using a RelativeLayout as the mail layout and add the ZoomButtonsController within the custom ImageView.
The Activity code
public class ImageViewActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
CustomImageView imageView = new CustomImageView(this);
relativeLayout.addView(imageView);
}
}
The CustomImageView code
public class CustomImageView extends ImageView {
private ZoomButtonsController mZoomButtons;
public CustomImageView(Context context) {
super(context);
RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.FILL_PARENT, RelativeLayout.LayoutParams.FILL_PARENT);
mZoomButtons = new ZoomButtonsController(this);
mZoomButtons.getZoomControls();
layoutParams.addRule(RelativeLayout.ALIGN_PARENT_TOP);
layoutParams.addRule(RelativeLayout.CENTER_HORIZONTAL);
setLayoutParams(layoutParams);
}
#Override
public boolean onTouchEvent(MotionEvent ev) {
Log.d("TAG", "touch");
mZoomButtons.setVisible(true);
return true;
}
}
I've tested with WRAP_CONTENT in the parameters, but this only makes the zoom buttons disappear.

As a matter of fact, I couldn't position the ZoomButtonsController in any way and in the end had to accept the default placement.

No links clickable in WebView embedded in ViewGroup if other children there

I have a RelativeLayout that contains a WebView and a ListView (ListViewContainer is a subclass of ListView:
public AdListViewContainer(Context context, ServiceLookup lookup, MarketList list, Registry registry, BitmapCache bitmapCache, Utilities utilities, ActionFlipper flipper) {
super(context);
mScale = getContext().getResources().getDisplayMetrics().density;
final int orientation = getResources().getConfiguration().orientation;
setClickable(true);
if (orientation == Configuration.ORIENTATION_PORTRAIT) {
mAd = new WebView(context);
mAd.setId(1234);
mAd.setWebViewClient(new AdListWebClient());
mAd.setOnTouchListener(new OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
Log.d (TAG, "Inner Event " + event.getAction());
return false;
}
});
mAd.getSettings().setJavaScriptEnabled(true);
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.FILL_PARENT, RelativeLayout.LayoutParams.FILL_PARENT);
lp.addRule(ALIGN_PARENT_BOTTOM, 1);
addView(mAd, lp);
}
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.FILL_PARENT, RelativeLayout.LayoutParams.FILL_PARENT);
if (mAd != null) {
lp.addRule(ALIGN_BOTTOM, mAd.getId());
}
mListContainer = new ListViewContainer(context, lookup, list, registry, bitmapCache, utilities, flipper);
addView(mListContainer, lp);
}
The WebView is showing an ad generated by Adition, basically an img-tag in an a-tag.
The problem I have is that the ad can't be clicked. No touch or click events are received by the WebView. When I remove the ListView and the WebView is the only child of the ViewGroup (by removing the last addView call), the ad is clickable and everything is fine.
ListViewContainer is a straightforward subclass of ListView that contains a load of clickable LinearLayouts.
Any help appreciated!

Ok, I found the issue. The ListView was overlapping the WebView, caused by using ALIGN_BOTTOM instead of ABOVE. D'Oh. HierarchyViewer was a blast in finding this.

I overrode OnTouchEvent for the Webview, and put the WebView inside of a FrameLayout, filling it, then put everything else I needed on top of the webview. Working great!