在Android M（预览版）中，用户可以选择特定应用并获取特定权限。
所以我问如何在运行时检查授予权限？
【问题讨论】：
标签： android android-permissions android-6.0-marshmallow
不错！！
我刚刚发现我的需要，我们可以检查权限是否被授予：
checkSelfPermission(Manifest.permission.READ_CONTACTS)
if (checkSelfPermission(Manifest.permission.READ_CONTACTS)
!= PackageManager.PERMISSION_GRANTED) {
requestPermissions(new String[]{Manifest.permission.READ_CONTACTS},
MY_PERMISSIONS_REQUEST_READ_CONTACTS);
// MY_PERMISSIONS_REQUEST_READ_CONTACTS is an
// app-defined int constant
return;
}
@Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_READ_CONTACTS: {
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay! do the
// calendar task you need to do.
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
}
return;
}
// other 'switch' lines to check for other
// permissions this app might request
}
}
【讨论】：
也可以通过以下代码sn-p进行查询，向后兼容；
int hasPermission = ContextCompat.checkSelfPermission(this,Manifest.permission.WRITE_CONTACTS);
if (hasPermission == PackageManager.PERMISSION_GRANTED) {
//Do smthng
}
【讨论】：
试试这个简单的请求代码
https://www.learn2crack.com/2015/10/android-marshmallow-permissions.html
public static final int REQUEST_ID_MULTIPLE_PERMISSIONS = 1;
private boolean checkAndRequestPermissions() {
int camera = ContextCompat.checkSelfPermission(this, android.Manifest.permission.CAMERA);
int storage = ContextCompat.checkSelfPermission(this, android.Manifest.permission.WRITE_EXTERNAL_STORAGE);
int loc = ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION);
int loc2 = ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION);
List<String> listPermissionsNeeded = new ArrayList<>();
if (camera != PackageManager.PERMISSION_GRANTED) {
listPermissionsNeeded.add(android.Manifest.permission.CAMERA);
}
if (storage != PackageManager.PERMISSION_GRANTED) {
listPermissionsNeeded.add(android.Manifest.permission.WRITE_EXTERNAL_STORAGE);
}
if (loc2 != PackageManager.PERMISSION_GRANTED) {
listPermissionsNeeded.add(android.Manifest.permission.ACCESS_FINE_LOCATION);
}
if (loc != PackageManager.PERMISSION_GRANTED) {
listPermissionsNeeded.add(android.Manifest.permission.ACCESS_COARSE_LOCATION);
}
if (!listPermissionsNeeded.isEmpty())
{
ActivityCompat.requestPermissions(this,listPermissionsNeeded.toArray
(new String[listPermissionsNeeded.size()]),REQUEST_ID_MULTIPLE_PERMISSIONS);
return false;
}
return true;
}
【讨论】：
fun hasPermission(permission: String): Boolean {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) return true // must be granted after installed.
return mAppSet.appContext.checkSelfPermission(permission) == PackageManager.PERMISSION_GRANTED
}
【讨论】：
对于位置运行时权限
ActivityCompat.requestPermissions(this,new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION}, 1);
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
switch (requestCode) {
case 1: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Log.d("yes","yes");
} else {
Log.d("yes","no");
// permission denied, boo! Disable the
// functionality that depends on this permission.
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
【讨论】：
试试这个检查运行时权限：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
checkRunTimePermission();
}
检查运行时权限：
private void checkRunTimePermission() {
String[] permissionArrays = new String[]{Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE};
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
requestPermissions(permissionArrays, 11111);
} else {
// if already permition granted
// PUT YOUR ACTION (Like Open cemara etc..)
}
}
处理权限结果：
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
boolean openActivityOnce = true;
boolean openDialogOnce = true;
if (requestCode == 11111) {
for (int i = 0; i < grantResults.length; i++) {
String permission = permissions[i];
isPermitted = grantResults[i] == PackageManager.PERMISSION_GRANTED;
if (grantResults[i] == PackageManager.PERMISSION_DENIED) {
// user rejected the permission
boolean showRationale = shouldShowRequestPermissionRationale(permission);
if (!showRationale) {
//execute when 'never Ask Again' tick and permission dialog not show
} else {
if (openDialogOnce) {
alertView();
}
}
}
}
if (isPermitted)
if (isPermissionFromGallery)
openGalleryFragment();
}
}
设置自定义提醒：
private void alertView() {
AlertDialog.Builder dialog = new AlertDialog.Builder(getActivity(), R.style.MyAlertDialogStyle);
dialog.setTitle("Permission Denied")
.setInverseBackgroundForced(true)
//.setIcon(R.drawable.ic_info_black_24dp)
.setMessage("Without those permission the app is unable to save your profile. App needs to save profile image in your external storage and also need to get profile image from camera or external storage.Are you sure you want to deny this permission?")
.setNegativeButton("I'M SURE", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialoginterface, int i) {
dialoginterface.dismiss();
}
})
.setPositiveButton("RE-TRY", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialoginterface, int i) {
dialoginterface.dismiss();
checkRunTimePermission();
}
}).show();
}
【讨论】：
原创（不是我的）帖子here
对于特殊权限，例如 android.Manifest.permission.PACKAGE_USAGE_STATS 使用 AppOpsManager：
Kotlin
private fun hasPermission(permission:String, permissionAppOpsManager:String): Boolean {
var granted = false
if (VERSION.SDK_INT >= VERSION_CODES.M) {
// requires kitkat
val appOps = applicationContext!!.getSystemService(Context.APP_OPS_SERVICE) as AppOpsManager
// requires lollipop
val mode = appOps.checkOpNoThrow(permissionAppOpsManager,
android.os.Process.myUid(), applicationContext!!.packageName)
if (mode == AppOpsManager.MODE_DEFAULT) {
granted = applicationContext!!.checkCallingOrSelfPermission(permission) == PackageManager.PERMISSION_GRANTED
} else {
granted = mode == AppOpsManager.MODE_ALLOWED
}
}
return granted
}
以及代码中的任何地方：
val permissionAppOpsManager = AppOpsManager.OPSTR_GET_USAGE_STATS
val permission = android.Manifest.permission.PACKAGE_USAGE_STATS
val permissionActivity = Settings.ACTION_USAGE_ACCESS_SETTINGS
if (hasPermission(permission, permissionAppOpsManager)) {
Timber.i("has permission: $permission")
// do here what needs permission
} else {
Timber.e("has no permission: $permission")
// start activity to get permission
startActivity(Intent(permissionActivity))
}
您可以通过TedPermission library获得其他权限
【讨论】：
在您的 build.gradle 中包含该库
dependencies{
implementation 'com.karumi:dexter:4.2.0'
}
这个例子请求WRITE_EXTERNAL_STORAGE.
Dexter.withActivity(this)
.withPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE)
.withListener(new PermissionListener() {
@Override
public void onPermissionGranted(PermissionGrantedResponse response) {
// permission is granted, open the camera
}
@Override
public void onPermissionDenied(PermissionDeniedResponse response) {
// check for permanent denial of permission
if (response.isPermanentlyDenied()) {
// navigate user to app settings
}
}
@Override
public void onPermissionRationaleShouldBeShown(PermissionRequest permission, PermissionToken token) {
token.continuePermissionRequest();
}
}).check();
检查这个答案here
【讨论】：
在 git 中查看以下库：
实施：
allprojects {
repositories {
...
maven { url 'https://jitpack.io' }
}
}
dependencies {
implementation 'com.github.manoj140220:RuntimePermission:1.0.3'
}
new RuntimePermission({Current Class Object}, String[] , {ActvityContext});
String[] : permission array.
example : String[] permissionArray = {Manifest.permission.CAMERA, Manifest.permission.BODY_SENSORS,...}
Implement : {PermissionNotify}
interface notifier methods.
@Override
public void notifyPermissionGrant() {
}
@Override
public void notifyPermissionDeny() {
}
【讨论】：