java - 找不到处理 Intent { act=android.settings.LOCALE_SETTINGS } 的 Activity

Question

我正在创建一个检查当前位置的代码，但是，当我检查当前位置时，它崩溃了。我查看了 Stack Trace 并看到了这个。我阅读了其他论坛，但我不熟悉他们的解决方案。我也是Java的初学者。我使用 Amazon Fire 平板电脑下载了这个应用程序。当我尝试在模拟器上测试它时，应用程序没有崩溃。

 android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.settings.LOCALE_SETTINGS }
        at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1797)
        at android.app.Instrumentation.execStartActivity(Instrumentation.java:1517)
        at android.app.Activity.startActivityForResult(Activity.java:3761)
        at androidx.fragment.app.FragmentActivity.startActivityForResult(FragmentActivity.java:676)
        at android.app.Activity.startActivityForResult(Activity.java:3722)
        at androidx.fragment.app.FragmentActivity.startActivityForResult(FragmentActivity.java:663)
        at android.app.Activity.startActivity(Activity.java:4032)
        at android.app.Activity.startActivity(Activity.java:4000)
        at com.example.calculatorandlocationfinderfinal.MainActivity$7.onClick(MainActivity.java:181)
        at androidx.appcompat.app.AlertController$ButtonHandler.handleMessage(AlertController.java:167)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5491)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:984)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)

下面是它发生的代码。

private void onGPS() {
    final AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setMessage("Enable GPS").setCancelable(false).setPositiveButton("YES", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            startActivity(new Intent(Settings.ACTION_LOCALE_SETTINGS));
        }
    }).setNegativeButton("No", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            dialog.cancel();
        }
    });
    final AlertDialog alertDialog = builder.create();
    alertDialog.show();
}

Answer 1

始终使用此方法来启动应用以外的 Intent -

Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
if(intent.resolveActivity(context.getPackageManager()) != null){
    startActivity(intent);
}else{
    //handle activity not found
}

这样你就不会得到 ActivityNotFoundException。

你也可以使用 try catch as -

try {
       startActivity(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS));
    } catch (e: ActivityNotFoundException) {
       //handle activity not found
    }