只依次询问运行时权限，而不是在数组中一次

Question

在我的 activity 的 onCreate() 中，我检查权限。

 if (ContextCompat.checkSelfPermission(this,
        Manifest.permission.WRITE_EXTERNAL_STORAGE)
        != PackageManager.PERMISSION_GRANTED) {

    ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 2);
}


if (ContextCompat.checkSelfPermission(this,
        Manifest.permission.CHECK_PHONE_STATE)
        != PackageManager.PERMISSION_GRANTED) {

    ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, 1);

}

对于每个权限，在它的回调方法中我执行某些tasks.So我不能像

那样询问数组中的权限

String[] permissions { };

因为它只会为我提供一个回调，所有 permissions.I 都按以下方式在每个回调中执行任务。

 case ConstantClass.READ_PERMISSION:
                if (grantResults.length > 0 && grantResults[0] != PackageManager.PERMISSION_GRANTED) {
              doSomething();
                    Toast.makeText(MainActivity.this, getResources().getString(R.string.Cannot_Vibrate_Phone), Toast.LENGTH_LONG).show();
                }
                break;

            case ConstantClass.CALL_PERMISSION:
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    dialPhoneNumber();
                } else {
                    Toast.makeText(MainActivity.this, getString(R.string.permission_access_call), Toast.LENGTH_LONG).show();
                }
                break;

如果我在onCreate()中一个接一个地询问这些权限。只有第一个权限是 displayed.So 我只有一个回电工作。那么如何实现这样的场景，即对于每个单独的权限，我都会得到一个单独的回调并调用其中的一些函数。谢谢 :)

Answer 1

检查这个演示代码

Ask next permission in response of first permission reject/grant in onRequestPermissionsResult()

public class MainActivity extends Activity {

    private Context context;
    private static final int REQUEST_RUNTIME_PERMISSION_1 = 111;
    private static final int REQUEST_RUNTIME_PERMISSION_2 = 222;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        context = this;
        if (CheckPermission(context, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
            // you have permission go ahead
        } else {
            // you do not have permission go request runtime permissions
            RequestPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE, REQUEST_RUNTIME_PERMISSION_1);
        }
    }

    @Override
    public void onRequestPermissionsResult(int permsRequestCode, String[] permissions,
                                           int[] grantResults) {
        switch (permsRequestCode) {
            case REQUEST_RUNTIME_PERMISSION_1: {
                if (grantResults.length > 0
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    // you have permission go ahead ask next permission and get separate callback
                    RequestPermission(MainActivity.this, Manifest.permission.CAMERA, REQUEST_RUNTIME_PERMISSION_2);
                } else {
                    // you do not have permission show toast.
                    /*check your logic ask again*/
                    //RequestPermission(MainActivity.this, Manifest.permission.CAMERA, REQUEST_RUNTIME_PERMISSION_2);
                }
                return;
            }
            case REQUEST_RUNTIME_PERMISSION_2: {
                if (grantResults.length > 0
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    // you have 2nd permission go ahead
                } else {
                    // you do not have 2nd permission show toast.
                }
                return;
            }
        }
    }

    public void RequestPermission(Activity thisActivity, String Permission, int Code) {
        if (ContextCompat.checkSelfPermission(thisActivity,
                Permission)
                != PackageManager.PERMISSION_GRANTED) {
            if (ActivityCompat.shouldShowRequestPermissionRationale(thisActivity,
                    Permission)) {
            } else {
                ActivityCompat.requestPermissions(thisActivity,
                        new String[]{Permission},
                        Code);
            }
        }
    }

    public boolean CheckPermission(Context context, String Permission) {
        if (ContextCompat.checkSelfPermission(context,
                Permission) == PackageManager.PERMISSION_GRANTED) {
            return true;
        } else {
            return false;
        }
    }
}

Answer 2

您可以在onRequestPermission中请求下一个权限以显示权限请求一个接一个。您可以检查以下代码并了解想法。在 onRequestPermissionResult 方法中：

case ConstantClass.READ_PERMISSION:
                if (grantResults.length > 0 && grantResults[0] != PackageManager.PERMISSION_GRANTED) {
              doSomething();
                    Toast.makeText(MainActivity.this, getResources().getString(R.string.Cannot_Vibrate_Phone), Toast.LENGTH_LONG).show();
                }
                // Ask for Camera permission
                if (ContextCompat.checkSelfPermission(this, Manifest.permission.CHECK_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) {
                    ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, 1);
                break;

希望对您有所帮助。

Answer 3

    String permissions[] = new String[]{Manifest.permission.CAMERA, Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.INTERNET};


    if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED
            &&ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED
            &&ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED ){
        ActivityCompat.requestPermissions(this, permissions, ALL_REQUEST_CODE);
    }
    else if(ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED
            &&ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED){
        ActivityCompat.requestPermissions(this, new String[] {permissions[1], permissions[2], permissions[3]}, ALL_REQUEST_CODE);
    }
    else if(ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED){
        ActivityCompat.requestPermissions(this, new String[] {permissions[2], permissions[3]}, ALL_REQUEST_CODE);
    }

这是获得权限的最佳方式

只依次询问运行时权限，而不是在数组中一次

Ask runtime permission one after another only,not at once in array

permissions

android

runtime-permissions