Get the height of virtual keyboard in Android

How can I get the height of virtual keyboard in Android? 开发者_如何转开发Is it possible?

I try to get it from the main window, but it gives me full height of the application. But I want to get the keyboard height.

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You can't get the keyboard height, but you can get the height of your View, which is what you really want - and you'll get this data supplied to the onLayout call into the current view.

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you can use this sample code. it is dirty solution but it works

Thread t = new Thread(){
            public void run() {
                int y = mainScreenView.getHeight()-2;
                int x = 10;
                int counter = 0;
                int height = y;
                while (true){
                    final MotionEvent m = MotionEvent.obtain(
                            SystemClock.uptimeMillis(),
                            SystemClock.uptimeMillis(),
                            MotionEvent.ACTION_DOWN,
                            x, 
                            y,
                            INTERNAL_POINTER_META_STATE);
                    final MotionEvent m1 = MotionEvent.obtain(
                            SystemClock.uptimeMillis(),
                            SystemClock.uptimeMillis(),
                            MotionEvent.ACTION_UP,
                            x, 
                            y,
                            INTERNAL_POINTER_META_STATE);
                    boolean pointer_on_softkeyboard = false;
                    try {
                        getSingletonInstrumentation().sendPointerSync(m);
                        getSingletonInstrumentation().sendPointerSync(m1);
                    } catch (SecurityException e) {
                        pointer_on_softkeyboard = true;
                    }
                    if (!pointer_on_softkeyboard){
                        if (y == height){
                            if (counter++ < 100){
                                Thread.yield();
                                continue;
                            }
                        } else if (y > 0){
                            softkeyboard_height = mainScreenView.getHeight() - y;
                        }
                        break;
                    }
                    y--;

                }
                if (softkeyboard_height > 0 ){
                    // it is calculated and saved in softkeyboard_height
                } else {
                    calculated_keyboard_height = false;
                }
            }
        };
        t.start();

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This solution is also hacky but solve the problem (atleast for me).

1. I have places on temporary view with transparent background at the bottom of the screen. So this view will be invisible.
2. I have added android:windowSoftInputMode="adjustResize" flag in activity tag in manifest.

3. Now main story is in onGlobalLayout(). There i calculate the difference between the y axis of temp view and height of root view

   final View view = findViewById(R.id.base); view.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {

   @Override
   public void onGlobalLayout() {
   
       int rootViewHeight = view.getRootView().getHeight();
       View tv = findViewById(R.id.temp_view);
       int location[] = new int[2];
       tv.getLocationOnScreen(location);
       int height = (int) (location[1] + tv.getMeasuredHeight());
       deff = rootViewHeight - height;
       // deff is the height of soft keyboard
   
   }
   

   });

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If you don't want android:windowSoftInputMode="adjustResize" in your app. You can try something like this:

    any_view.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            int height = main_layout.getHeight();
            Log.w("Foo", String.format("layout height: %d", height));
            Rect r = new Rect();
            main_layout.getWindowVisibleDisplayFrame(r);
            int visible = r.bottom - r.top;
            Log.w("Foo", String.format("visible height: %d", visible));
            Log.w("Foo", String.format("keyboard height: %d", height - visible));
        }
    });

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Let's suppose that the rootView of your layout is RelativeLayout. What you can do create a class CustomRelativeLayout which extends RelativeLayout and Overrides onSizeChanged Method inside it. So when the soft keyboard opens up, the height of the RelativeLayout will change and the change will be notified inside the onSizeChanged Method.

public class CustomRelativeLayout extends RelativeLayout {

@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
    super.onSizeChanged(w, h, oldw, oldh);
    int softKeyboardHeight = oldh - h; // Assuming softKeyboard Opened up
    // oldh is the height when the layout was covering the whole screen
    // h is the new height of the layout when the soft keyboard opened up

    if(softKeyboardHeight > oldh * 0.15) {
        Log.i("Here", Integer.toString(softKeyboardHeight));
        // Keyboard has popped up

    } else {
        // Not the keyboard
    }
}

In your Manifest file make these changes so that the Activity opens in Resize Mode and Not pan and scan mode. In Resize mode the Layout will be able to resize when keybaord opens up. To read more about pan-scan and Resize visit https://developer.android.com/training/keyboard-input/visibility

<activity
        android:name=".MainActivity"
        android:windowSoftInputMode="adjustResize">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

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Try this

KeyboardView keyboardView = new KeyboardView(getApplicationContext(), null);
int height = (keyboardView.getKeyboard()).getHeight();
Toast.makeText(getApplicationContext(), height+"", Toast.LENGTH_LONG).show();