Question

我的活动延伸AppCompatActivity。要运行此活动，我需要授予应用ACCESS_COARSE_LOCATION和WRITE_EXTERNAL_STORAGE权限。在我更新到Android Studio 3.0之前，一切运行良好。

现在，没有显示请求WRITE_EXTERNAL_STORAGE权限的提示，以及功能

public void onRequestPermissionsResult(int requestCode,
                                           String permissions[], int[] grantResults)

在grantResults上返回-1，甚至没有询问。

如果我请求权限ACCESS_COARSE_LOCATION，则不会发生此行为。下面，代码调用两个检查：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

            if (this.checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                final AlertDialog.Builder builder = new AlertDialog.Builder(this);
                builder.setTitle("This app needs location access");
                builder.setMessage("Please grant location access so this app can detect beacons.");
                builder.setPositiveButton(android.R.string.ok, null);
                builder.setOnDismissListener(new DialogInterface.OnDismissListener() {
                    public void onDismiss(DialogInterface dialog) {
                        requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, PERMISSION_REQUEST_COARSE_LOCATION);
                    }
                });

                builder.show();
            }
        }

另一个：

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            final int PERMISSION_REQUEST_COARSE_LOCATION = 1;

            if (this.checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
                final AlertDialog.Builder builder = new AlertDialog.Builder(this);
                builder.setTitle("This app needs sd access");
                builder.setMessage("Please grant sd access so this app can save files.");
                builder.setPositiveButton(android.R.string.ok, null);
                builder.setOnDismissListener(new DialogInterface.OnDismissListener() {
                    public void onDismiss(DialogInterface dialog) {
                        requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, PERMISSION_REQUEST_WRITE_EXTERNAL_STORAGE);
                    }
                });

                builder.show();
            }
        }

我的清单中的相应部分如下所示：

<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

我已经阅读了很多内容，但是当某些类型的权限显示在请求对话框中时，这很奇怪，而其他人则不是。顺便说一下，设备中没有SD卡（总是使用内部存储器），但这绝不是问题。

targetSdkVersion和compileSdkVersion都是26。

修改

其他相关权限（例如READ_EXTERNAL_STORAGE）也正常运行。这只是写权限的问题。测试了两个Android设备和模拟器

完成onCreate方法：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_device_discovery);

    context = this;
    wm = (WifiManager) context.getApplicationContext().getSystemService(WIFI_SERVICE);
    intent = getIntent();

    if(intent.getBooleanExtra("LOCAL_NETWORK", true) == true){
        ipAddress = Formatter.formatIpAddress(wm.getConnectionInfo().getIpAddress());
        port = DEFAULT_LIGHT_PORT;
    }
    else{
         ipAddress = intent.getStringExtra("TRACK_IP");
         port = intent.getIntExtra("TRACK_PORT", DEFAULT_GATEWAY_PORT);
    }

    font = Typeface.createFromAsset(MainActivity.mainActivity.getAssets(), "RepRg.ttf");
    mHandler = new Handler();

    deviceArrayList = new ArrayList<>();
    devicesBufferList = new ArrayList<>();

    lightListAdapter = new LightListAdapter(this, deviceArrayList, intent);

    discoveredListView = (ListView) findViewById(R.id.paired_devices);
    discoveredListView.setAdapter(lightListAdapter);

    listAllCheckBox = (CheckBox) findViewById(R.id.listAllCheckBox);
    refreshButton = (ImageButton) findViewById(R.id.refreshButton);

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

        if (this.checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
            final AlertDialog.Builder builder = new AlertDialog.Builder(this);
            builder.setTitle("This app needs sd access");
            builder.setMessage("Please grant sd access so this app can save files.");
            builder.setPositiveButton(android.R.string.ok, null);
            builder.setOnDismissListener(new DialogInterface.OnDismissListener() {
                public void onDismiss(DialogInterface dialog) {
                    requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, PERMISSION_REQUEST_WRITE_EXTERNAL_STORAGE);
                }
            });

            builder.show();
        }
    }


    listAllCheckBox.setTypeface(font);
    listAllCheckBox.setTextSize(18);
    listAllCheckBox.setTextColor(Color.parseColor("#202020"));
    listAllCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            lightListAdapter.clear();
            processDeviceListing();
        }
    });

    refreshButton.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {

            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    refreshButton.setImageResource(R.drawable.refresh_down);
                    break;
                case MotionEvent.ACTION_UP:
                    refreshButton.setImageResource(R.drawable.refresh_up);
                    refreshDevicesList();
                    break;
                case MotionEvent.ACTION_CANCEL:
                    refreshButton.setImageResource(R.drawable.refresh_up);
                    break;
            }
            return false;
        }
    });

}

提前致谢。

Answer 1

原来这个问题是由于新版HockeyApp造成的。 HockeySDK集成在我的应用程序中。现在，从版本5.0.0开始，文档说：

为了准备Android O，HockeySDK-Android现在限制了使用maxSdkVersion过滤器的WRITE_EXTERNAL_STORAGE权限。在一些用例，例如应用程序包含需要的依赖项这个权限，maxSdkVersion让那些人无法做到依赖项以授予或请求权限。解决方案那些情况是声明工具：node =“replace”清单合并稍后在依赖树中的策略

因此，在清单中添加工具：node =“replace”到WRITE权限后，问题就解决了。

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" tools:node="replace"/>

Source here

我希望这对其他人有用

Answer 2

试试这个：

if (ContextCompat.checkSelfPermission(this,
                Manifest.permission.ACCESS_COARSE_LOCATION)
        != PackageManager.PERMISSION_GRANTED) {

        ActivityCompat.requestPermissions(this,
                new String[]{Manifest.permission.ACCESS_COARSE_LOCATION},
                PERMISSION_REQUEST_COARSE_LOCATION);
    }

我建议您查看文档：{{3}}

<强>更新

为什么您对这两种权限使用相同的请求代码？

 requestPermissions(new String[]{Manifest.permission. ACCESS_COARSE_LOCATION}, PERMISSION_REQUEST_COARSE_LOCATION); <-- PERMISSION_REQUEST_COARSE_LOCATION

和

 requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, PERMISSION_REQUEST_COARSE_LOCATION);  <-- PERMISSION_REQUEST_COARSE_LOCATION

更改每个请求代码值。

requestPermissions提示没有显示

2 个答案: