Develop Reference

ViewCompat.setElevation doesn't draw view over another view below LOLLIPOP?

Using the code below, I'm trying to draw a View over another view when one of the views is clicked, and reverse it when clicked again. in API level 25 and it works fine, but on another phone with API 17, it doesn't work
private void elevationTest() {
final View view1 = findViewById(R.id.view1);
final View view2 = findViewById(R.id.view2);
final boolean[] asdf = {true};
view1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (asdf[0]) {
ViewCompat.setElevation(view1, 1);
ViewCompat.setElevation(view2, 2);
asdf[0] = !asdf[0];
} else {
ViewCompat.setElevation(view1, 2);
ViewCompat.setElevation(view2, 1);
asdf[0] = !asdf[0];
}
}
});
}
is there a way to make it happen? Thanks.
EDIT:
I'm not trying to simulate a drop shadow under my Views, just trying to draw them over each other (in this case, when the first view is clicked).

How to get the text value of a button and load it into another button in Android

I am creating a word game application , I have created a grid view consisting of buttons. When I click a button in the grid view a popup windows opens which contains all the English alphabets.Now when I click any letter in my pop up window , I want that letter to appear in my grid that is the string in my pop window's button must appear in my grid view's button. , how do I do it?
This is my button's code:
button1.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v) {
layoutInflater = (LayoutInflater) getApplicationContext().getSystemService(LAYOUT_INFLATER_SERVICE);
View container = layoutInflater.inflate(R.layout.activity_popup,null);
popupWindow = new PopupWindow(container,800,1100,true);
popupWindow.showAtLocation(constraintLayout, Gravity.NO_GRAVITY,150,400);
b1=(Button) findViewById(R.id.b1);
String s1 = b1.getText().toString();
button1.setText(s1);
container.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View view, MotionEvent motionevent){
popupWindow.dismiss();
return true;
}
});
}
});
My popup window's code:
b1.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v)
{
String s1 = "A";
overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out);
finish();
}
});
Screenshots of the app
This is my grid layout where the user must enter the letters
When I click any button on the grid this is the pop up window which is displayed.
If I run this , the app is getting stopped.

It might help us if you would share the exact exception that is thrown by your application.
If I unterstand you correctly, then b1 is a button contained in your activity_popup- layout. So you might want to try b1 = (Button) container.findViewById(R.id.b1) instead. If thats not working, post your exception!

Popup window on a ListView Android

I have created a custom arrayadapter for my listview. It has a player name and the score, I also have a add button on the cell, when that button is clicked I want a popup screen to appear, Here is where the user can add the score of the player. This popup window has 6 buttons "+1", "+2" "+10" ..etc and a done button. When the done button is clicked the score gets updated.
I am handling the add button click event on my customArraryAdapter class, so I have to create the popup here as well. I have searched and tried to do this with no success.
What I tried so far:
I have a View = convertView and a viewHolder = holder The problem is I'm not so sure what to pass as the parameter to create a popup. The code below is myCustomArrayAdapter class. I have also read popups cant handle touch events, but some are saying it can. Since my popup has a lot of buttons maybe this might be a great solution.
This is in #Override
public View getView(final int position, View convertView, ViewGroup parent) Method in CustomArrayAdapter Class
//Handle add button click
holder.add.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
addScores(convertView);
//list gets updated
notifyDataSetChanged();
}
});
My addScores method looks like this
private void addScores(View v){
PopupWindow pw;
LayoutInflater inflater = (LayoutInflater)v.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.weight_popup, (ViewGroup)v.findViewById(R.id.linlay_weight_popup));
pw = new PopupWindow(layout, ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT, true);
pw.setBackgroundDrawable(new BitmapDrawable());
pw.setOutsideTouchable(true);
pw.showAsDropDown(btnSelectWeight);
}

You may pass View that will be displayed in popup the same way you do.
Consider this:
View layout = inflater.inflate(R.layout.weight_popup, (ViewGroup)v.findViewById(R.id.linlay_weight_popup));
Your weight_popup layout should contain 6 buttons, which would have onClick there you update scores.
Something like:
Button btn1 = (Button)layout.findViewById(R.id.btn1);
btn1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
//update your score here.
}
});
//other buttons..
pw = new PopupWindow(layout, ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT, true);

Android - Change Hamburger/Back icons color programmatically during runtime

I'm trying to change the style attribute "colorControlNormal" of my app programmatically and during runtime, but I didn't have any results.
This property is the color that will tint the hamburger & back icons of the new Toolbar viewGroup. Beside, I'm using the v7 compatibility library.
I heard that we cannot change app theme during runtime, but I'm looking for an answer, even if it's not so clean way.
Edit:
I just figured that gmail is doing what i want, when you click on the search icon, the white hamburger icon turn into grey back.
Waiting for more.

I spent one day, played with different implementation. So my opinion, the best way todo that it copy paste DrawerArrowDrawable from AppCompat v7 library.
https://gist.github.com/IstiN/5d542355935fd7f0f357 - take a look on the code with some optimization
than you can use it in your main activity with code below
DrawerArrowDrawable drawable = new DrawerArrowDrawable(this, this);
ImageView menuButton = (ImageView) findViewById(R.id.arrow);
menuButton.setImageDrawable(drawable);
menuButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
((DrawerLayout)findViewById(R.id.drawer)).openDrawer(Gravity.START);
}
});
when you start new fragment, you need to create one more view on the same place and add second code to your fragment
private DrawerArrowDrawable mArrowDrawable;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
mArrowDrawable = new DrawerArrowDrawable(getActivity(), getActivity());
ImageView topButton = (ImageView) view.findViewById(R.id.arrow);
topButton.setImageDrawable(mArrowDrawable);
topButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
closeSearch();
}
});
//run animation from hamburger to arrow
animate(0, 1, null);
....
private void animate(int startValue, int endvalue, Animator.AnimatorListener listener) {
ValueAnimator anim = ValueAnimator.ofFloat(startValue, endvalue);
anim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
float slideOffset = (Float) valueAnimator.getAnimatedValue();
mArrowDrawable.setProgress(slideOffset);
}
});
anim.setInterpolator(new DecelerateInterpolator());
anim.setDuration(300);
if (listener != null) {
anim.addListener(listener);
}
anim.start();
}
to make animation from arrow to hamburger handle back button and execute code
animate(1, 0, null);
you also need to wait in your fragment while animation will not finish, but it another questions.
If you have any questions ask in comments.

Android OnLongClickListener issue

I have a custom view, DisView(Context, bitmap), which I want to add a LongCLickListener to.
The view is displayed once something else is clicked.
public void onClick(View view) {
...
RelativeLayout toplayout = new RelativeLayout(this);
setContentView(toplayout);
Bitmap bmp2 = BitmapFactory.decodeResource(getResources(), R.drawable.tag3);
tag3 = new DisView(this,bmp2);
tag3.setOnLongClickListener(this);
I should add that originally the activity's contentview is set to a linearlayout, but on a button being clicked, setContentLayout() makes a relativelayout the new layout.
Next I did the onLongClick method ( a method of the activity, implementing onlongclicklistener):
#Override
public boolean onLongClick(View view) {
moveTag(view);
return true;
}
moveTag() is a very simple TranslateAnimation. I have no idea why it doesn't work. I have a feeling it may be because I changed the layout.

did you think about ViewSwitcher to change your displayed layout?
Jonathan

if toplayout is a LinearLayout and you write
RelativeLayout toplayout = new RelativeLayout(this);
the software will usually crash on startup(or when this view is activated), if what you meet now is the software crashes once it started(or when you start this activity), it is highly possible that the problem is caused by this statement.

In your example you did this:
tag3.setOnLongClickListener(this);
Why did you do that?
setOnLongClickListener takes a parameter of type OnLongClickLIstener. Something like:
tag3.setOnLongClickListener((OnLongClickListener) keyHdlr);
where keyHdlr looks something like this:
OnLongClickListener keyHdlr = new View.OnLongClickListener() {
#Override
public boolean onLongClick(View v) {
Log.d("long", "backspace phone land long clicked!!!!!!");
return false;
}
};