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
我通过设置一个GlobalLayoutListener来做到这一点,如下所示:
final View activityRootView = findViewById(R.id.activityRoot);
activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(
new OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
int heightView = activityRootView.getHeight();
int widthView = activityRootView.getWidth();
if (1.0 * widthView / heightView > 3) {
//Make changes for Keyboard not visible
} else {
//Make changes for keyboard visible
}
}
});
其他回答
在Android中,你可以通过ADB shell进行检测。我写下并使用了这个方法:
{
JSch jsch = new JSch();
try {
Session session = jsch.getSession("<userName>", "<IP>", 22);
session.setPassword("<Password>");
Properties config = new Properties();
config.put("StrictHostKeyChecking", "no");
session.setConfig(config);
session.connect();
ChannelExec channel = (ChannelExec)session.openChannel("exec");
BufferedReader in = new BufferedReader(new
InputStreamReader(channel.getInputStream()));
channel.setCommand("C:/Android/android-sdk/platform-tools/adb shell dumpsys window
InputMethod | findstr \"mHasSurface\"");
channel.connect();
String msg = null;
String msg2 = " mHasSurface=true";
while ((msg = in.readLine()) != null) {
Boolean isContain = msg.contains(msg2);
log.info(isContain);
if (isContain){
log.info("Hiding keyboard...");
driver.hideKeyboard();
}
else {
log.info("No need to hide keyboard.");
}
}
channel.disconnect();
session.disconnect();
} catch (JSchException | IOException | InterruptedException e) {
e.printStackTrace();
}
}
}
There is a direct method to find this out. And, it does not require the layout changes. So it works in immersive fullscreen mode, too. But, unfortunately, it does not work on all devices. So you have to test it with your device(s). The trick is that you try to hide or show the soft keyboard and capture the result of that try. If it works correct then the keyboard is not really shown or hidden. We just ask for the state. To stay up-to-date, you simply repeat this operation, e.g. every 200 milliseconds, using a Handler. The implementation below does just a single check. If you do multiple checks, then you should enable all the (_keyboardVisible) tests.
public interface OnKeyboardShowHide
{
void onShowKeyboard( Object param );
void onHideKeyboard( Object param );
}
private static Handler _keyboardHandler = new Handler();
private boolean _keyboardVisible = false;
private OnKeyboardShowHide _keyboardCallback;
private Object _keyboardCallbackParam;
public void start( OnKeyboardShowHide callback, Object callbackParam )
{
_keyboardCallback = callback;
_keyboardCallbackParam = callbackParam;
//
View view = getCurrentFocus();
if (view != null)
{
InputMethodManager imm = (InputMethodManager) getSystemService( Activity.INPUT_METHOD_SERVICE );
imm.hideSoftInputFromWindow( view.getWindowToken(), InputMethodManager.HIDE_IMPLICIT_ONLY, _keyboardResultReceiver );
imm.showSoftInput( view, InputMethodManager.SHOW_IMPLICIT, _keyboardResultReceiver );
}
else // if (_keyboardVisible)
{
_keyboardVisible = false;
_keyboardCallback.onHideKeyboard( _keyboardCallbackParam );
}
}
private ResultReceiver _keyboardResultReceiver = new ResultReceiver( _keyboardHandler )
{
@Override
protected void onReceiveResult( int resultCode, Bundle resultData )
{
switch (resultCode)
{
case InputMethodManager.RESULT_SHOWN :
case InputMethodManager.RESULT_UNCHANGED_SHOWN :
// if (!_keyboardVisible)
{
_keyboardVisible = true;
_keyboardCallback.onShowKeyboard( _keyboardCallbackParam );
}
break;
case InputMethodManager.RESULT_HIDDEN :
case InputMethodManager.RESULT_UNCHANGED_HIDDEN :
// if (_keyboardVisible)
{
_keyboardVisible = false;
_keyboardCallback.onHideKeyboard( _keyboardCallbackParam );
}
break;
}
}
};
这是如何在一个片段中使用软键盘状态监听器(适用于API 21及以上)
private var currentWindowInsets: WindowInsetsCompat = WindowInsetsCompat.Builder().build()
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
setWindowInsetsAnimationCallback(requireView().rootView, object : Callback(DISPATCH_MODE_CONTINUE_ON_SUBTREE) {
override fun onProgress(insets: WindowInsetsCompat, runningAnimations: MutableList<WindowInsetsAnimationCompat>): WindowInsetsCompat {
currentWindowInsets = insets
return insets
}
override fun onEnd(animation: WindowInsetsAnimationCompat) {
super.onEnd(animation)
val keyboardIsVisible = currentWindowInsets.isVisible(WindowInsetsCompat.Type.ime())
if (keyboardIsVisible) { //do your stuff }
}
})
}
试试这个,对我很有效
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
if (imm.isActive())
//Keyboard is active
一个基于@bohdan-oliynyk答案的更紧凑的Kotlin版本
private const val KEYBOARD_VISIBLE_THRESHOLD_DP = 100
fun Activity.isKeyboardOpen(): Boolean {
fun convertDpToPx(value: Int): Int =
(value * Resources.getSystem().displayMetrics.density).toInt()
val rootView = findViewById<View>(android.R.id.content)
val visibleThreshold = Rect()
rootView.getWindowVisibleDisplayFrame(visibleThreshold)
val heightDiff = rootView.height - visibleThreshold.height()
val accessibleValue = convertDpToPx(KEYBOARD_VISIBLE_THRESHOLD_DP)
return heightDiff > accessibleValue
}
fun Activity.isKeyboardClosed(): Boolean {
return isKeyboardOpen().not()
}
推荐文章
- 警告:API ' variable . getjavacompile()'已过时,已被' variable . getjavacompileprovider()'取代
- 安装APK时出现错误
- 碎片中的onCreateOptionsMenu
- TextView粗体通过XML文件?
- 如何使线性布局的孩子之间的空间?
- DSL元素android.dataBinding。enabled'已过时,已被'android.buildFeatures.dataBinding'取代
- ConstraintLayout:以编程方式更改约束
- PANIC: AVD系统路径损坏。检查ANDROID_SDK_ROOT值
- 如何生成字符串类型的buildConfigField
- Recyclerview不调用onCreateViewHolder
- Android API 21工具栏填充
- Android L中不支持操作栏导航模式
- 如何在TextView中添加一个子弹符号?
- PreferenceManager getDefaultSharedPreferences在Android Q中已弃用
- 在Android Studio中创建aar文件