在Android中,可以通过监听软键盘的显示和隐藏事件来捕获"虚拟键盘显示/隐藏"事件。以下是一种常用的方法:
public class KeyboardVisibilityListener implements ViewTreeObserver.OnGlobalLayoutListener {
private final View rootView;
private final OnKeyboardVisibilityListener onKeyboardVisibilityListener;
private boolean isKeyboardVisible = false;
public interface OnKeyboardVisibilityListener {
void onVisibilityChanged(boolean isVisible);
}
public KeyboardVisibilityListener(View rootView, OnKeyboardVisibilityListener onKeyboardVisibilityListener) {
this.rootView = rootView;
this.onKeyboardVisibilityListener = onKeyboardVisibilityListener;
}
@Override
public void onGlobalLayout() {
Rect r = new Rect();
rootView.getWindowVisibleDisplayFrame(r);
int screenHeight = rootView.getRootView().getHeight();
// 计算屏幕高度和可见区域的差值,如果大于一定阈值,则认为键盘显示
int heightDiff = screenHeight - (r.bottom - r.top);
boolean isVisible = heightDiff > screenHeight * 0.15;
if (isVisible != isKeyboardVisible) {
isKeyboardVisible = isVisible;
onKeyboardVisibilityListener.onVisibilityChanged(isVisible);
}
}
}
public class MainActivity extends AppCompatActivity implements KeyboardVisibilityListener.OnKeyboardVisibilityListener {
private View rootView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
rootView = findViewById(android.R.id.content);
KeyboardVisibilityListener keyboardVisibilityListener = new KeyboardVisibilityListener(rootView, this);
rootView.getViewTreeObserver().addOnGlobalLayoutListener(keyboardVisibilityListener);
}
@Override
public void onVisibilityChanged(boolean isVisible) {
if (isVisible) {
// 虚拟键盘显示
// 在此处添加处理逻辑
} else {
// 虚拟键盘隐藏
// 在此处添加处理逻辑
}
}
}
通过上述方法,我们可以在Android中捕获"虚拟键盘显示/隐藏"事件,并在相应的回调方法中处理相关逻辑。
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