Question

我有一个列表，其中包含手机中安装的所有应用程序。单击其中一个部分以卸载所选应用程序。问题是即使卸载了应用程序，也会保留在列表中。要删除它我已完成此代码但不起作用（崩溃）

protected void onListItemClick(ListView l, View v, int position, long id) {
    super.onListItemClick(l, v, position, id);
    int requestCode = 1;
    app = appList.get(position);
    Uri packageUri = Uri.parse("package:" + app.packagename);
    this.position = position;
    Intent uninstallIntent = new Intent(Intent.ACTION_DELETE, packageUri);
    startActivityForResult(uninstallIntent, requestCode);
}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == 1) {
        try {
            ApplicationInfo packageInfo = getPackageManager().getApplicationInfo(app.packagename, 0);
        } catch (PackageManager.NameNotFoundException e) {
            appInfoArrayList.remove(position);
            adapter.notifyDataSetChanged();
        }
    }
}

这是logcat

11-12 17:51:07.188: E/AndroidRuntime(27943): FATAL EXCEPTION: main
11-12 17:51:07.188: E/AndroidRuntime(27943): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=0, data=null} to activity {com.packagename/com.packagename.class}: java.lang.NullPointerException
11-12 17:51:07.188: E/AndroidRuntime(27943):    at android.app.ActivityThread.deliverResults(ActivityThread.java:3495)
11-12 17:51:07.188: E/AndroidRuntime(27943):    at android.app.ActivityThread.handleSendResult(ActivityThread.java:3538)
11-12 17:51:07.188: E/AndroidRuntime(27943):    at android.app.ActivityThread.access$1100(ActivityThread.java:153)
11-12 17:51:07.188: E/AndroidRuntime(27943):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1317)
11-12 17:51:07.188: E/AndroidRuntime(27943):    at android.os.Handler.dispatchMessage(Handler.java:99)
11-12 17:51:07.188: E/AndroidRuntime(27943):    at android.os.Looper.loop(Looper.java:137)
11-12 17:51:07.188: E/AndroidRuntime(27943):    at android.app.ActivityThread.main(ActivityThread.java:5289)
11-12 17:51:07.188: E/AndroidRuntime(27943):    at java.lang.reflect.Method.invokeNative(Native Method)
11-12 17:51:07.188: E/AndroidRuntime(27943):    at java.lang.reflect.Method.invoke(Method.java:525)
11-12 17:51:07.188: E/AndroidRuntime(27943):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:739)
11-12 17:51:07.188: E/AndroidRuntime(27943):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:555)
11-12 17:51:07.188: E/AndroidRuntime(27943):    at dalvik.system.NativeStart.main(Native Method)
11-12 17:51:07.188: E/AndroidRuntime(27943): Caused by: java.lang.NullPointerException
11-12 17:51:07.188: E/AndroidRuntime(27943):    at com.packagename.onActivityResult(myclass:java:87)
11-12 17:51:07.188: E/AndroidRuntime(27943):    at android.app.Activity.dispatchActivityResult(Activity.java:5322)
11-12 17:51:07.188: E/AndroidRuntime(27943):    at android.app.ActivityThread.deliverResults(ActivityThread.java:3491)
11-12 17:51:07.188: E/AndroidRuntime(27943):    ... 11 more

我的意图是在卸载后从列表中删除该应用程序但是为什么会崩溃以及如何解决它？

onActivityResult传递结果ResultInfo失败

0 个答案: