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如何检查Android中软件键盘的可见性?
如何检查Android中软件键盘的可见性?
我需要做一个非常简单的事情 - 找出是否显示了软件键盘。这在Android中可行吗?
慕尼黑5688855
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回答 3
3回答
有只小跳蛙
对于迟到的答案很抱歉,但是我创建了一个小助手类来处理打开/关闭事件,通知听众和其他有用的东西,可能有人会发现它有用:import android.graphics.Rect;import android.view.View;import android.view.ViewTreeObserver;import java.util.LinkedList;import java.util.List;public class SoftKeyboardStateWatcher implements ViewTreeObserver.OnGlobalLayoutListener { public interface SoftKeyboardStateListener { void onSoftKeyboardOpened(int keyboardHeightInPx); void onSoftKeyboardClosed(); } private final List<SoftKeyboardStateListener> listeners = new LinkedList<SoftKeyboardStateListener>(); private final View activityRootView; private int lastSoftKeyboardHeightInPx; private boolean isSoftKeyboardOpened; public SoftKeyboardStateWatcher(View activityRootView) { this(activityRootView, false); } public SoftKeyboardStateWatcher(View activityRootView, boolean isSoftKeyboardOpened) { this.activityRootView = activityRootView; this.isSoftKeyboardOpened = isSoftKeyboardOpened; activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(this); } @Override public void onGlobalLayout() { final Rect r = new Rect(); //r will be populated with the coordinates of your view that area still visible. activityRootView.getWindowVisibleDisplayFrame(r); final int heightDiff = activityRootView.getRootView().getHeight() - (r.bottom - r.top); if (!isSoftKeyboardOpened && heightDiff > 100) { // if more than 100 pixels, its probably a keyboard... isSoftKeyboardOpened = true; notifyOnSoftKeyboardOpened(heightDiff); } else if (isSoftKeyboardOpened && heightDiff < 100) { isSoftKeyboardOpened = false; notifyOnSoftKeyboardClosed(); } } public void setIsSoftKeyboardOpened(boolean isSoftKeyboardOpened) { this.isSoftKeyboardOpened = isSoftKeyboardOpened; } public boolean isSoftKeyboardOpened() { return isSoftKeyboardOpened; } /** * Default value is zero {@code 0}. * * @return last saved keyboard height in px */ public int getLastSoftKeyboardHeightInPx() { return lastSoftKeyboardHeightInPx; } public void addSoftKeyboardStateListener(SoftKeyboardStateListener listener) { listeners.add(listener); } public void removeSoftKeyboardStateListener(SoftKeyboardStateListener listener) { listeners.remove(listener); } private void notifyOnSoftKeyboardOpened(int keyboardHeightInPx) { this.lastSoftKeyboardHeightInPx = keyboardHeightInPx; for (SoftKeyboardStateListener listener : listeners) { if (listener != null) { listener.onSoftKeyboardOpened(keyboardHeightInPx); } } } private void notifyOnSoftKeyboardClosed() { for (SoftKeyboardStateListener listener : listeners) { if (listener != null) { listener.onSoftKeyboardClosed(); } } }}用法示例:final SoftKeyboardStateWatcher softKeyboardStateWatcher = new SoftKeyboardStateWatcher(findViewById(R.id.activity_main_layout); // Add listenersoftKeyboardStateWatcher.addSoftKeyboardStateListener(...);// then just handle callbacks
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