问题描述

在我的 android 应用程序中，我使用的是自定义对话框.当我尝试显示对话框时，会导致错误.我不知道我做错了什么，我真的很困惑.

In my android application, I am using a custom dialog. When I try to show the dialog, it causes an error. I don't know what I am doing wrong, and I am really confused.

这是我的代码:

protected Dialog onCreateDialog(int id) {
    Dialog dialog;
    switch(id) {
    case 0:
        dialog = new Dialog(getApplicationContext());

        dialog.setContentView(R.layout.paused);
        dialog.setTitle("Game Paused");
        dialog.show();
        break;
    default:
        dialog = null;
    }
    return null;
}

这是我显示对话框的方式

And here is how I show the dialog

showDialog(0);

顺便说一句，它说 showDialog(int) 已被弃用.

By the way, it says that showDialog(int) is deprecated.

Android 日志:

Android logcat:

> 06-19 18:44:22.399: W/dalvikvm(467): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
06-19 18:44:22.419: E/AndroidRuntime(467): FATAL EXCEPTION: main
06-19 18:44:22.419: E/AndroidRuntime(467): java.lang.IllegalStateException: Could not execute method of the activity
06-19 18:44:22.419: E/AndroidRuntime(467):  at android.view.View$1.onClick(View.java:2072)
06-19 18:44:22.419: E/AndroidRuntime(467):  at android.view.View.performClick(View.java:2408)
06-19 18:44:22.419: E/AndroidRuntime(467):  at android.view.View$PerformClick.run(View.java:8816)
06-19 18:44:22.419: E/AndroidRuntime(467):  at android.os.Handler.handleCallback(Handler.java:587)
06-19 18:44:22.419: E/AndroidRuntime(467):  at android.os.Handler.dispatchMessage(Handler.java:92)
06-19 18:44:22.419: E/AndroidRuntime(467):  at android.os.Looper.loop(Looper.java:123)
06-19 18:44:22.419: E/AndroidRuntime(467):  at android.app.ActivityThread.main(ActivityThread.java:4627)
06-19 18:44:22.419: E/AndroidRuntime(467):  at java.lang.reflect.Method.invokeNative(Native Method)
06-19 18:44:22.419: E/AndroidRuntime(467):  at java.lang.reflect.Method.invoke(Method.java:521)
06-19 18:44:22.419: E/AndroidRuntime(467):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
06-19 18:44:22.419: E/AndroidRuntime(467):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
06-19 18:44:22.419: E/AndroidRuntime(467):  at dalvik.system.NativeStart.main(Native Method)
06-19 18:44:22.419: E/AndroidRuntime(467): Caused by: java.lang.reflect.InvocationTargetException
06-19 18:44:22.419: E/AndroidRuntime(467):  at com.jlennon.gametest.PlayGameActivity.pause(PlayGameActivity.java:105)
06-19 18:44:22.419: E/AndroidRuntime(467):  at java.lang.reflect.Method.invokeNative(Native Method)
06-19 18:44:22.419: E/AndroidRuntime(467):  at java.lang.reflect.Method.invoke(Method.java:521)
06-19 18:44:22.419: E/AndroidRuntime(467):  at android.view.View$1.onClick(View.java:2067)
06-19 18:44:22.419: E/AndroidRuntime(467):  ... 11 more
06-19 18:44:22.419: E/AndroidRuntime(467): Caused by: android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application
06-19 18:44:22.419: E/AndroidRuntime(467):  at android.view.ViewRoot.setView(ViewRoot.java:509)
06-19 18:44:22.419: E/AndroidRuntime(467):  at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:177)
06-19 18:44:22.419: E/AndroidRuntime(467):  at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
06-19 18:44:22.419: E/AndroidRuntime(467):  at android.app.Dialog.show(Dialog.java:241)
06-19 18:44:22.419: E/AndroidRuntime(467):  at com.jlennon.gametest.PlayGameActivity.onCreateDialog(PlayGameActivity.java:131)
06-19 18:44:22.419: E/AndroidRuntime(467):  at android.app.Activity.onCreateDialog(Activity.java:2472)
06-19 18:44:22.419: E/AndroidRuntime(467):  at android.app.Activity.createDialog(Activity.java:881)
06-19 18:44:22.419: E/AndroidRuntime(467):  at android.app.Activity.showDialog(Activity.java:2547)
06-19 18:44:22.419: E/AndroidRuntime(467):  at android.app.Activity.showDialog(Activity.java:2514)
06-19 18:44:22.419: E/AndroidRuntime(467):  ... 15 more

提前非常感谢！

推荐答案

试试这个代码

 protected Dialog onCreateDialog(int id) {
  Dialog dialog;
  switch(id) {
   case 0:
    dialog = new Dialog(this);

    dialog.setContentView(R.layout.paused);
    dialog.setTitle("Game Paused");
    dialog.show();
    break;
default:
    dialog = null;
}
return null;

}

我刚刚将 dialog = new Dialog(getApplicationContext()) 替换为 dialog = new Dialog(this);

I just replaced dialog = new Dialog(getApplicationContext()) to dialog = new Dialog(this);

这篇关于Android-显示自定义对话框的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持跟版网！