我在实现运行时权限时遇到了问题。我查看了以下链接以实现运行时权限:
https://developer.android.com/training/permissions/requesting.html
我只是遇到android.permission.MODIFY_PHONE_STATE权限的问题。我已经测试了以下代码来获取相机权限,代码可以正常运行。
我遇到的问题如下:
- shouldShowRequestPermissionRationale()返回false
- requestPermissions()未授予权限。
等级细节:compileSdkVersion 23,buildToolsVersion "23.0.3",targetSdkVersion 23
清单详情:我已添加以下权限
uses-permission android:name="android.permission.MODIFY_PHONE_STATE"
private static final int PERMISSIONS_REQUEST_CODE = 123;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
int granted = PackageManager.PERMISSION_GRANTED;
int result = ContextCompat.checkSelfPermission(ActivityMain.this,Manifest.permission.MODIFY_PHONE_STATE);
if (result == granted) {
Toast.makeText(ActivityMain.this,"permissions granted",Toast.LENGTH_LONG).show();
}
if (result != PackageManager.PERMISSION_GRANTED) {
Toast.makeText(ActivityMain.this, "permissions denied", Toast.LENGTH_LONG).show();
boolean res = ActivityCompat.shouldShowRequestPermissionRationale(ActivityMain.this,Manifest.permission.MODIFY_PHONE_STATE);
// returning false
if (res) {
new AlertDialog.Builder(ActivityMain.this)
.setMessage("Allow")
.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
ActivityCompat.requestPermissions(ActivityMain.this,
new String[]{Manifest.permission.MODIFY_PHONE_STATE},
PERMISSIONS_REQUEST_CODE);
}
}).setNegativeButton(android.R.string.cancel, null).show();
} else {
ActivityCompat.requestPermissions(ActivityMain.this,
new String[]{Manifest.permission.MODIFY_PHONE_STATE},
PERMISSIONS_REQUEST_CODE);
}
}
}
@Override
public void onRequestPermissionsResult(int requestCode,String permissions[], int[] grantResults) {
switch (requestCode) {
case PERMISSIONS_REQUEST_CODE: {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Toast.makeText(ActivityMain.this,"permissions granted",Toast.LENGTH_LONG).show();
} else {
Toast.makeText(ActivityMain.this,"permissions not granted",Toast.LENGTH_LONG).show();
}
return;
}
}
}