android.support.v4.app.ActivityCompat.OnRequestPermissionsResultCallback中的奇怪ArrayIndexOutOfBoundsException

本文介绍了android.support.v4.app.ActivityCompat.OnRequestPermissionsResultCallback中的奇怪ArrayIndexOutOfBoundsException的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我在Play商店控制台中收到一个与 android.support.v4.app.ActivityCompat.OnRequestPermissionsResultCallback

I received a strange out of bounds exception in the Play Store console relating to the android.support.v4.app.ActivityCompat.OnRequestPermissionsResultCallback

java.lang.ArrayIndexOutOfBoundsException: length=0; index=0
    at com.example.MyFragmentActivity.onRequestPermissionsResult(MyFragmentActivity.java:2068)
    at android.app.Activity.requestPermissions(Activity.java:4163)
    at android.support.v4.app.ActivityCompatApi23.requestPermissions(ActivityCompat23.java:32)
    at android.support.v4.app.ActivityCompat.requestPermissions(ActivityCompat.java:316)
    at com.example.MyFragmentActivity.onConnected(MyFragmentActivity.java:2048)
    at com.google.android.gms.common.internal.zzk.zzk(Unknown Source)
    at com.google.android.gms.common.api.internal.zzj.zzi(Unknown Source)
    at com.google.android.gms.common.api.internal.zzh.zzpx(Unknown Source)
    at com.google.android.gms.common.api.internal.zzh.onConnected(Unknown Source)
    at com.google.android.gms.common.api.internal.zzl.onConnected(Unknown Source)
    at com.google.android.gms.common.api.internal.zzc.onConnected(Unknown Source)
    at com.google.android.gms.common.internal.zzj$zzg.zzqL(Unknown Source)
    at com.google.android.gms.common.internal.zzj$zza.zzc(Unknown Source)
    at com.google.android.gms.common.internal.zzj$zza.zzw(Unknown Source)
    at com.google.android.gms.common.internal.zzj$zzc.zzqN(Unknown Source)
    at com.google.android.gms.common.internal.zzj$zzb.handleMessage(Unknown Source)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:158)
    at android.app.ActivityThread.main(ActivityThread.java:7229)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)

这是我的onRequestPermissionsResult实现

This is my onRequestPermissionsResult implementation

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    switch (requestCode) {
        case REQUEST_CODE_ASK_LOCATION_PERMISSIONS:
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                // Permission Granted
                if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
                    mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
                }
                startLocationUpdates();
            } else {
                // Permission Denied
            }
            break;
        default:
            super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    }
}

第2068行是这样:

if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {

我认为它声称 grantResults 的长度为零，这就是抛出java.lang.ArrayIndexOutOfBoundsException的原因.根据文档

I believe it's claiming grantResults length is zero which is why the java.lang.ArrayIndexOutOfBoundsException is thrown. According to the documentation

grantResults 不会为null，但也不会说任何也不包含任何值的内容.此外，似乎回调将包含至少一个值，即 PERMISSION_GRANTED 或 PERMISSION_DENIED .这是错误还是我误解了文档?

grantResults will not be null, but doesn't say anything about it not containing a value either. Furthermore it seems like the callback will contain at least one value, either PERMISSION_GRANTED or PERMISSION_DENIED. Is this a bug or am I misunderstanding the documentation?

推荐答案

有关权限的文档说

这似乎是您的情况，因此您必须首先检查数组是否为空:

And it seems to be your situation, so you have to check first if the array is not empty:

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    switch (requestCode) {
        case REQUEST_CODE_ASK_LOCATION_PERMISSIONS:
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                // Permission Granted
                if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
                    mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
                }
                startLocationUpdates();
            } else {
                // Permission Denied
            }
            break;
        default:
            super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    }
}

这篇关于android.support.v4.app.ActivityCompat.OnRequestPermissionsResultCallback中的奇怪ArrayIndexOutOfBoundsException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！

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