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
private fun isKeyboardVisible(rootView: View) =
ViewCompat.getRootWindowInsets(rootView)!!.isVisible(WindowInsetsCompat.Type.ime())
其他回答
这应该工作,如果你需要检查键盘状态:
fun Activity.isKeyboardOpened(): Boolean {
val r = Rect()
val activityRoot = getActivityRoot()
val visibleThreshold = dip(UiUtils.KEYBOARD_VISIBLE_THRESHOLD_DP)
activityRoot.getWindowVisibleDisplayFrame(r)
val heightDiff = activityRoot.rootView.height - r.height()
return heightDiff > visibleThreshold;
}
fun Activity.getActivityRoot(): View {
return (findViewById<ViewGroup>(android.R.id.content)).getChildAt(0);
}
UiUtils的地方。KEYBOARD_VISIBLE_THRESHOLD_DP = 100, dip()是一个anko函数,转换dpToPx:
fun dip(value: Int): Int {
return (value * Resources.getSystem().displayMetrics.density).toInt()
}
可以使用showSoftInput()和hideSoftInput()的回调结果来检查键盘的状态。完整的细节和示例代码在
https://rogerkeays.com/how-to-check-if-the-software-keyboard-is-shown-in-android
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?。
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()
}
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;
}
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