安卓申请权限

public static boolean isOverMarshmallow() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.M;
}

if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED) {
//申请WRITE_EXTERNAL_STORAGE权限
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
0);
}

@TargetApi(value = Build.VERSION_CODES.M)
public static List<String> findDeniedPermissions(Activity activity, String... permission) {
List<String> denyPermissions = new ArrayList<>();
for (String value : permission) {
if (activity.checkSelfPermission(value) != PackageManager.PERMISSION_GRANTED) {
denyPermissions.add(value);
}
}
return denyPermissions;
}

if (deniedPermissions.size() > 0) {
if (object instanceof Activity) {
((Activity) object).requestPermissions(deniedPermissions.toArray(new String[deniedPermissions.size()]), requestCode);
} else if (object instanceof Fragment) {
((Fragment) object).requestPermissions(deniedPermissions.toArray(new String[deniedPermissions.size()]), requestCode);
} else {
throw new IllegalArgumentException(object.getClass().getName() + " is not supported");
}
在activity或者fragemnt重写onRequestPermissionsResult方法，可以查看当前授权结果
如果用户拒绝授权，可以重新申请。