检查用户是否已在Android中授予权限

概述我在String数组中定义了所有危险权限,如下所示： String[] perms = {Manifest.permission.READ_CONTACTS, Manifest.permission.READ_PHONE_STATE, Manifest.permission.CALL_PHONE, 我在String数组中定义了所有危险权限,如下所示：

String[] perms = {Manifest.permission.READ_CONTACTS,Manifest.permission.READ_PHONE_STATE,Manifest.permission.CALL_PHONE,Manifest.permission.MODIFY_PHONE_STATE};

然后检查它们是否已被授予我运行：

for (int i = 0; i < perms.length; i++) {        if(ContextCompat.checkSelfPermission(this,perms[i])!=PackageManager.PERMISSION_GRANTED)        {            ActivityCompat.requestPermissions(this,perms,permsRequestCode);            break;        }    }

出于某种原因,这不起作用.它请求一次权限,然后如果我从设置中手动禁用它,它会多次调出对话框.

我该如何解决？

解决方法 使用此选项可以检查所需的任何权限,一次性是单个权限还是多个权限.

public class PermissionsUtils {public static final int REQUEST_PERMISSION_MulTIPLE = 0;public static final int REQUEST_PERMISSION_CAMERA = 1;public static final int REQUEST_PERMISSION_LOCATION = 2;public static final int REQUEST_WRITE_EXTERNAL = 3;public static boolean checkAndRequestPermissions(Activity activity) {    System.out.println("PermissionsUtils checkAndRequestPermissions()");    int permissionCamera = ContextCompat.checkSelfPermission(activity,Manifest.permission.CAMERA);    int permissionLocation = ContextCompat.checkSelfPermission(activity,Manifest.permission.ACCESS_FINE_LOCATION);    int permissionWriteExternal = ContextCompat.checkSelfPermission(activity,Manifest.permission.WRITE_EXTERNAL_STORAGE);    // Permission List    List<String> ListPermissionsNeeded = new ArrayList<>();    // Camera Permission    if (permissionCamera != PackageManager.PERMISSION_GRANTED) {        // Should we show an explanation?        if (ActivityCompat.shouldShowRequestPermissionRationale(activity,Manifest.permission.CAMERA)) {            Toast.makeText(activity,"Camera Permission is required for this app to run",Toast.LENGTH_SHORT)                    .show();        }        ListPermissionsNeeded.add(Manifest.permission.CAMERA);    }    // Read/Write Permission    if (permissionWriteExternal != PackageManager.PERMISSION_GRANTED) {        ListPermissionsNeeded.add(Manifest.permission.WRITE_EXTERNAL_STORAGE);    }    // Location Permission    if (permissionLocation != PackageManager.PERMISSION_GRANTED) {        ListPermissionsNeeded.add(Manifest.permission.ACCESS_FINE_LOCATION);    }    if (!ListPermissionsNeeded.isEmpty()) {        ActivityCompat.requestPermissions(activity,ListPermissionsNeeded.toArray(new String[ListPermissionsNeeded.size()]),REQUEST_PERMISSION_MulTIPLE);        return false;    }    return true;}/** * Requests the Camera permission. If the permission has been denIEd * prevIoUsly,a Snackbar will prompt the user to grant the permission,* otherwise it is requested directly. */public static voID requestCameraPermission(Activity activity) {    // Here,thisActivity is the current activity    // System.out.println("requestCameraPermission() INITIAL");    // Toast.makeText(this,"requestCameraPermission() INITIAL",// Toast.LENGTH_LONG).show();    if (ContextCompat.checkSelfPermission(activity,Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {        // Should we show an explanation?        if (ActivityCompat.shouldShowRequestPermissionRationale(activity,Manifest.permission.CAMERA)) {            // Toast.makeText(activity,"Camera permission is            // needed for this app to run ",// Toast.LENGTH_SHORT).show();            // System.out.println("requestCameraPermission() SHOW INFO");            // Show an explanation to the user *asynchronously* -- don't            // block            // this thread waiting for the user's response! After the user            // sees the explanation,try again to request the permission.            ActivityCompat.requestPermissions(activity,new String[] { Manifest.permission.CAMERA },REQUEST_PERMISSION_CAMERA);        } else {            // No explanation needed,we can request the permission.            // System.out.println("requestCameraPermission() ASK            // PERMISSION");            ActivityCompat.requestPermissions(activity,REQUEST_PERMISSION_CAMERA);        }        // Permission is granted    } else {        System.out.println("requestCameraPermission() PERMISSION ALREADY GRANTED");    }}public static voID requestLocationPermission(Activity activity) {    if (ContextCompat.checkSelfPermission(activity,Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {        // Should we show an explanation?        if (ActivityCompat.shouldShowRequestPermissionRationale(activity,Manifest.permission.ACCESS_FINE_LOCATION)) {            Toast.makeText(activity,"LOCATION permission is needed to display location info ",Toast.LENGTH_SHORT)                    .show();            // Show an explanation to the user *asynchronously* -- don't            // block this thread waiting for the user's response! After the            // user sees the explanation,try again to request the            // permission.            ActivityCompat.requestPermissions(activity,new String[] { Manifest.permission.ACCESS_FINE_LOCATION },REQUEST_PERMISSION_LOCATION);            Toast.makeText(activity,"REQUEST LOCATION PERMISSION",Toast.LENGTH_LONG).show();        } else {            // No explanation needed,we can request the permission.            ActivityCompat.requestPermissions(activity,REQUEST_PERMISSION_LOCATION);            Toast.makeText(activity,Toast.LENGTH_LONG).show();            // MY_PERMISSIONS_REQUEST_READ_CONTACTS is an            // app-defined int constant. The callback method gets the            // result of the request.        }        // Permission is granted    } else {    }}public static voID requestWriteExternalPermission(Activity activity) {    if (ContextCompat.checkSelfPermission(activity,Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {        // Should we show an explanation?        if (ActivityCompat.shouldShowRequestPermissionRationale(activity,Manifest.permission.WRITE_EXTERNAL_STORAGE)) {            Toast.makeText(activity,"Write permission is needed to create Excel file ",Toast.LENGTH_SHORT).show();            // Show an explanation to the user *asynchronously* -- don't            // block this thread waiting for the user's response! After the            // user sees the explanation,new String[] { Manifest.permission.WRITE_EXTERNAL_STORAGE },REQUEST_WRITE_EXTERNAL);            Toast.makeText(activity,we can request the permission.            ActivityCompat.requestPermissions(activity,REQUEST_WRITE_EXTERNAL);        }    }}public static boolean hasPermissions(Context context,String... permissions) {    if (androID.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && context != null && permissions != null) {        for (String permission : permissions) {            if (ActivityCompat.checkSelfPermission(context,permission) != PackageManager.PERMISSION_GRANTED) {                return false;            }        }    }    return true;}

}

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