Question

如何在Android中获得虚拟键盘的高度？有可能吗？

我试图从主窗口获取它，但它给了我应用程序的全高。但我想获得键盘高度。

Answer 1

您无法获得键盘高度，但您可以获得View的高度，这正是您真正想要的 - 并且您将把这些数据提供给onLayout调用到当前视图中。

Answer 2

您可以使用此示例代码。它是肮脏的解决方案，但它的工作原理

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();

Answer 3

这个解决方案也是hacky但解决问题（至少对我来说）。

我在屏幕底部有透明背景的临时视图。所以这个观点将是不可见的。
我在清单中的活动代码中添加了android:windowSoftInputMode="adjustResize"标记。

现在主要故事在onGlobalLayout()。我计算了临时视图的y轴和根视图的高度之间的差异

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

}

}）;

Answer 4

如果您不想在应用中使用android:windowSoftInputMode="adjustResize"。你可以尝试这样的事情：

    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));
        }
    });

Answer 5

让我们假设您的布局的rootView是RelativeLayout。您可以创建一个类CustomRelativeLayout来扩展RelativeLayout和覆盖其中的onSizeChanged方法。因此，当软键盘打开时，RelativeLayout的高度将发生变化，并且更改将在onSizeChanged方法内通知。

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
    }
}

在清单文件中进行这些更改，以使“活动”以“调整大小”模式打开，而不是“平移和扫描”模式。在“调整大小”模式下，打开键盘时，布局将能够调整大小。要了解有关全景扫描和调整大小的更多信息，请访问 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>

Answer 6

试试这个

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

获取Android中虚拟键盘的高度

6 个答案: