AlertDialog.Builder builder;
AlertDialog alertDialog;
Context mContext = getApplicationContext();
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.dialoglayout,
(ViewGroup) findViewById(R.id.layout_root));
TextView text = (TextView) layout.findViewById(R.id.text);
text.setText("Hello, this is a custom dialog!");
ImageView image = (ImageView) layout.findViewById(R.id.image);
image.setImageResource(R.drawable.icon);
builder = new AlertDialog.Builder(mContext);
builder.setView(layout);
alertDialog = builder.create();
alertDialog.show();
誰能告訴我這個代碼。它的問題給出了以下異常:的Android警告對話框不工作
11月11日至6日:44:20.572:ERROR/AndroidRuntime(339):致命異常: main 11-06 11:44:20.572:ERROR/AndroidRuntime(339):java.lang.RuntimeException:無法啓動活動ComponentInfo {com.andoroid.dialog/com.andoroid.dialog.AlertDialogTestActivity}:android.view.WindowManager $ BadTokenException:無法添加窗口 - 標記null不適用於應用程序 11-06 11:44:20.572:ERROR/AndroidRuntime(339):at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 11 -06 11:44:20.572: ERROR/AndroidRuntime(339):at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 11-06 11:44:20.572:ERROR/AndroidRuntime(339):at android.app.ActivityThread.access $ 2300(ActivityThread .java:125) 11-06 11:44:20.572:ERROR/AndroidRuntime(339):at android.app.ActivityThread $ H.handleMessage(ActivityThread.java:2033) 11-06 11:44:20.572:ERROR/AndroidRuntime(339):at android.os.Handler.dispatchMessage(Handler.java:99) 11-06 11:44:20.572:ERROR/AndroidRuntime(339):at android.os.Looper.loop(Looper.java :123) 11-06 11:44:20.572:ERROR/AndroidRuntime(339):at android.app.ActivityThread.main(ActivityThread.java:4627) 11-06 11:44:20.572:ERROR/AndroidRuntime(339) ):java.lang.reflect.Method.invokeNative(Native Method) 11-06 11:44:20.572:ERROR/An droidRuntime(339):at java.lang.reflect.Method.invoke(Method.java:521) 11-06 11:44:20.572:ERROR/AndroidRuntime(339):at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:868) 11-06 11:44:20.572:ERROR/AndroidRuntime(339):at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 11-06 11:44:20.572:ERROR/AndroidRuntime(339):at dalvik.system.NativeStart.main(Native Method) 11-06 11:44:20.572:ERROR/AndroidRuntime(339):由:android.view.WindowManager $ BadTokenException:無法添加窗口 - 標記null不適用於應用程序 11-06 11:44:20.572:ERROR/AndroidRuntime(339):at android.view.ViewRoot.setView(ViewRoot.java:509) 11 -06 11:44:20.572:ERROR/AndroidRuntime(339):at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:177) 11-06 11:44:20.572:ERROR/AndroidRuntime(339):at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91) 11-06 11:44:20.572:ERROR/AndroidRuntime(339):at android.app.Dialog.show(Dialog.java:241) 11-06 11:44:20.572:ERROR/AndroidRuntime(339):at com.andoroid.dialog.AlertDialogTestActivity.createDialog(AlertDialogTestActivity.java:48) 11 -06 11:44:20.572:ERROR/AndroidRuntime(339):at com.andoroid.dialog.AlertDialogTestActivity.onCreate(AlertDialogTestActivity.java:22) 11-06 11:44:20.572:ERROR/AndroidRuntime(339):at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 11-06 11:44:20.572:ERROR/AndroidRuntime(339):at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
感謝名單了很多隊友,它的工作!你能告訴我使用applicationContext時出錯的原因嗎? – Gaurav
public Context getApplicationContext() 從以下版本開始:API級別1 返回當前進程的單個全局應用程序對象的上下文。這通常只應用於需要生命週期與當前上下文分離的Context,該生命週期與進程的生命週期相關,而不是當前組件。 – breceivemail