Android系统中是否有一种方法可以检测软件(也就是Android。“软”)键盘在屏幕上可见吗?
当前回答
final View activityRootView = findViewById(R.id.rootlayout);
activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
Rect r = new Rect();
activityRootView.getWindowVisibleDisplayFrame(r);
int screenHeight = activityRootView.getRootView().getHeight();
Log.e("screenHeight", String.valueOf(screenHeight));
int heightDiff = screenHeight - (r.bottom - r.top);
Log.e("heightDiff", String.valueOf(heightDiff));
boolean visible = heightDiff > screenHeight / 3;
Log.e("visible", String.valueOf(visible));
if (visible) {
Toast.makeText(LabRegister.this, "I am here 1", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(LabRegister.this, "I am here 2", Toast.LENGTH_SHORT).show();
}
}
});
其他回答
试试这个:
InputMethodManager imm = (InputMethodManager) getActivity()
.getSystemService(Context.INPUT_METHOD_SERVICE);
if (imm.isAcceptingText()) {
writeToLog("Software Keyboard was shown");
} else {
writeToLog("Software Keyboard was not shown");
}
没有直接的方法-请参阅http://groups.google.com/group/android-platform/browse_thread/thread/1728f26f2334c060/5e4910f0d9eb898a,来自Android团队的Dianne Hackborn已经回复。但是,您可以通过检查#onMeasure中窗口大小是否改变来间接检测它。参见如何检查软件键盘的可见性在Android?。
试试这段代码,它真的工作,如果keyboardshow是显示的,那么这个函数返回真值....
private final String TAG = "TextEditor";
private TextView mTextEditor;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_editor);
mTextEditor = (TextView) findViewById(R.id.text_editor);
mTextEditor.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
isKeyboardShown(mTextEditor.getRootView());
}
});
}
private boolean isKeyboardShown(View rootView) {
/* 128dp = 32dp * 4, minimum button height 32dp and generic 4 rows soft keyboard */
final int SOFT_KEYBOARD_HEIGHT_DP_THRESHOLD = 128;
Rect r = new Rect();
rootView.getWindowVisibleDisplayFrame(r);
DisplayMetrics dm = rootView.getResources().getDisplayMetrics();
/* heightDiff = rootView height - status bar height (r.top) - visible frame height (r.bottom - r.top) */
int heightDiff = rootView.getBottom() - r.bottom;
/* Threshold size: dp to pixels, multiply with display density */
boolean isKeyboardShown = heightDiff > SOFT_KEYBOARD_HEIGHT_DP_THRESHOLD * dm.density;
Log.d(TAG, "isKeyboardShown ? " + isKeyboardShown + ", heightDiff:" + heightDiff + ", density:" + dm.density
+ "root view height:" + rootView.getHeight() + ", rect:" + r);
return isKeyboardShown;
}
我把答案转换为kotlin,希望这对kotlin用户有帮助。
private fun checkKeyboardVisibility() {
var isKeyboardShowing = false
binding.coordinator.viewTreeObserver.addOnGlobalLayoutListener {
val r = Rect()
binding.coordinator.getWindowVisibleDisplayFrame(r)
val screenHeight = binding.coordinator.rootView.height
// r.bottom is the position above soft keypad or device button.
// if keypad is shown, the r.bottom is smaller than that before.
val keypadHeight = screenHeight - r.bottom
if (keypadHeight > screenHeight * 0.15) { // 0.15 ratio is perhaps enough to determine keypad height.
// keyboard is opened
if (!isKeyboardShowing) {
isKeyboardShowing = true
}
} else {
// keyboard is closed
if (isKeyboardShowing) {
isKeyboardShowing = false
}
}
}
}
A可能会使用:
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
Log.d(
getClass().getSimpleName(),
String.format("conf: %s", newConfig));
if (newConfig.hardKeyboardHidden != hardKeyboardHidden) {
onHardwareKeyboardChange(newConfig.hardKeyboardHidden);
hardKeyboardHidden = newConfig.hardKeyboardHidden;
}
if (newConfig.keyboardHidden != keyboardHidden) {
onKeyboardChange(newConfig.keyboardHidden);
keyboardHidden = newConfig.hardKeyboardHidden;
}
}
public static final int KEYBOARDHIDDEN_UNDEFINED = 0;
public static final int KEYBOARDHIDDEN_NO = 1;
public static final int KEYBOARDHIDDEN_YES = 2;
public static final int KEYBOARDHIDDEN_SOFT = 3;
//todo
private void onKeyboardChange(int keyboardHidden) {
}
//todo
private void onHardwareKeyboardChange(int hardKeyboardHidden) {
}
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