[英]Hiding Keyboard on Android crashes app
當我嘗試運行此行以隱藏鍵盤時(我得到InputMethodManager):
this.context = context;
InputMethodManager mgr = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE); //this line crashes the app
我該怎么做才能解決這個問題? (順便說一句,我從一個片段運行它)
崩潰日志:
11-03 16:20:26.700: D/AndroidRuntime(2809): Shutting down VM
11-03 16:20:26.700: W/dalvikvm(2809): threadid=1: thread exiting with uncaught exception (group=0x40a13300)
11-03 16:20:26.710: E/AndroidRuntime(2809): FATAL EXCEPTION: main
11-03 16:20:26.710: E/AndroidRuntime(2809): java.lang.NullPointerException
11-03 16:20:26.710: E/AndroidRuntime(2809): at co.emuze.tabtest1.Tab1$1.onClick(Tab1.java:32)
11-03 16:20:26.710: E/AndroidRuntime(2809): at android.view.View.performClick(View.java:4084)
11-03 16:20:26.710: E/AndroidRuntime(2809): at android.view.View$PerformClick.run(View.java:16966)
11-03 16:20:26.710: E/AndroidRuntime(2809): at android.os.Handler.handleCallback(Handler.java:615)
11-03 16:20:26.710: E/AndroidRuntime(2809): at android.os.Handler.dispatchMessage(Handler.java:92)
11-03 16:20:26.710: E/AndroidRuntime(2809): at android.os.Looper.loop(Looper.java:137)
11-03 16:20:26.710: E/AndroidRuntime(2809): at android.app.ActivityThread.main(ActivityThread.java:4745)
11-03 16:20:26.710: E/AndroidRuntime(2809): at java.lang.reflect.Method.invokeNative(Native Method)
11-03 16:20:26.710: E/AndroidRuntime(2809): at java.lang.reflect.Method.invoke(Method.java:511)
11-03 16:20:26.710: E/AndroidRuntime(2809): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
11-03 16:20:26.710: E/AndroidRuntime(2809): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
11-03 16:20:26.710: E/AndroidRuntime(2809): at dalvik.system.NativeStart.main(Native Method)
完全點擊方法:
public void onClick(View v) {
text1.setText(editText1.getText().toString());
InputMethodManager mgr = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
mgr.hideSoftInputFromWindow(editText1.getWindowToken(), 0);
}
它會顯示上下文為空 - 您顯示this.context = context
,如果右側context
不是該方法的本地變量,則您什么都不做。 我認為你可能正在尋找的是context = getApplicationContext()
別忘了使用try catch blog,因為萬一你的鍵盤沒有打開,如果你使用鍵盤隱藏代碼應用程序崩潰
用戶在Fragment中的代碼下方
try {
InputMethodManager imm = (InputMethodManager)getSystemService(INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), 0);
} catch (Exception e) {
// TODO: handle exception
}
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