没有这样的机制来检查InputMethodPicker
是否打开。
但是您可以通过另一种方式检查它,例如使用hasWindowFocus()
检查方法关注您的根布局。
下面是示例代码:
主.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/mainlayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello" />
<Button
android:id="@+id/btnPicker"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Picker" />
<Button
android:id="@+id/btnCheck"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Stop" />
</LinearLayout>
DemoappActivity.class
public class DemoappActivity extends Activity {
/** Called when the activity is first created. */
Button btn1 , btn2;
InputMethodManager imeManager;
LinearLayout mLayoutRoot;
TimerTask timertask;
Timer timer;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mLayoutRoot = (LinearLayout)findViewById(R.id.mainlayout);
imeManager = (InputMethodManager) getApplicationContext().getSystemService(INPUT_METHOD_SERVICE);
btn1 = (Button)findViewById(R.id.btnPicker);
btn1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
showInputMethodPicker();
}
});
btn2 = (Button)findViewById(R.id.btnCheck);
btn2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
timer.cancel();
}
});
checkMyWindowHasFocus();
}
@Override
protected void onDestroy() {
timer.cancel();
super.onDestroy();
}
public void checkMyWindowHasFocus()
{
timertask = new TimerTask() {
@Override
public void run() {
System.out.println("has window focus..."+mLayoutRoot.hasWindowFocus());
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(), "Has focus "+mLayoutRoot.hasWindowFocus(), Toast.LENGTH_SHORT).show();
}
});
}
};
timer = new Timer();
timer.schedule(timertask, 500, 5000);
}
private void showInputMethodPicker() {
if (imeManager != null) {
imeManager.showInputMethodPicker();
} else {
Toast.makeText(this, "Error",Toast.LENGTH_LONG).show();
}
}
}