在Android 6.0中请求权限（API级别23）

Question

Is it necessary that requesting each dangerous permission it needs while the app is running Android 6.0 or higher?I have requested the following dangerous permissions,but there are only four dialogs.

The premissions

 public static final String[] PERMISSIONS = new String[]{
        android.Manifest.permission.CALL_PHONE,
        android.Manifest.permission.WRITE_EXTERNAL_STORAGE,
        android.Manifest.permission.READ_EXTERNAL_STORAGE,
        android.Manifest.permission.ACCESS_COARSE_LOCATION,
        android.Manifest.permission.ACCESS_FINE_LOCATION,
        android.Manifest.permission.READ_PHONE_STATE,
        android.Manifest.permission.WRITE_SETTINGS,
        android.Manifest.permission.GET_ACCOUNTS,
        android.Manifest.permission.CAMERA
};

The dialogs

1.Allow the app to make and manage phone calls?

2.Allow the app to access photos,media,and files on your device?

3.Allow the app to access this device's location?

4.Allow the app to access your contacts?

I cant get the permissions such as android.Manifest.permission.READ_PHONE_STATE, android.Manifest.permission.WRITE_SETTINGS, android.Manifest.permission.GET_ACCOUNTS, android.Manifest.permission.CAMERA,neither code nor system setting.

Answer 1

Special Permissions

There are a couple of permissions that don't behave like normal and dangerous permissions. WRITE_SETTINGS is particularly sensitive, so most apps should not use them. If an app needs one of these permissions, it must declare the permission in the manifest, and send an intent requesting the user's authorization. The system responds to the intent by showing a detailed management screen to the user.

Demo

public class MainActivity extends AppCompatActivity {

    Context context;
    TextView textView;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        context = this;
        textView = (TextView) findViewById(R.id.foodName);
        textView.setText(getResources().getText(R.string.txt_name));
        textView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                boolean result = true;
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                    result = Settings.System.canWrite(context);
                    Log.d("TAG", "Can Write Settings: " + result);
                    if (result) {
                        Toast.makeText(context, "Write allowed :-)", Toast.LENGTH_LONG).show();
                    } else {
                        Toast.makeText(context, "Write not allowed :-(", Toast.LENGTH_LONG).show();
                        Intent intent = new Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS);
                        intent.setData(Uri.parse("package:" + context.getPackageName()));
                        startActivity(intent);
                    }
                }
            }
        });
    }
}