Question

我创建了一个小的权限助手，由于某些未知的原因，当我拒绝许可时，我得到了两次。第一个是正常的，登陆请求许可的活动。第二个是在重定向到上一个活动后拒绝权限时显示的。

感谢您的帮助，

在onResume方法中调用helper，如下所示：

@Override
protected void onResume() {
    super.onResume();
    if(permissionHelper.checkPermission(this, Manifest.permission.READ_CONTACTS)){
        initContact();
    }
}

然后是onActivityPermissionResult，看起来像这样

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    permissionHelper.onRequestPermissionsResult(requestCode, grantResults, new PermissionHelper.PermissionListener() {
        @Override
        public void onPermissionGranted() {
            initContact();
        }

        @Override
        public void onPermissionDenied() {
            Intent intent = new Intent(ContactActivity.this, MainActivity.class);
            startActivity(intent);
        }
    });
}

我的PermissionHelper看起来像这样：

public class PermissionHelper {

/**
 * Two possible callback: granted or not.
 */
public interface PermissionListener {
    void onPermissionGranted();
    void onPermissionDenied();
}

private static PermissionHelper mInstance;
private static Activity mActivity;
private static String mPermission;
private static final int REQUEST_CODE = 1337;

private PermissionHelper() {
    setmActivity(mActivity);
    setmPermission(mPermission);
}

public static PermissionHelper getInstance(){
    if(mInstance == null){
        mInstance = new PermissionHelper();
    }
    return mInstance;
}

public static void setmActivity(Activity mActivity) {
    PermissionHelper.mActivity = mActivity;
}

public static void setmPermission(String mPermission) {
    PermissionHelper.mPermission = mPermission;
}

public static boolean checkPermission(Activity activity, String permission){

    mActivity = activity;
    mPermission = permission;

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        int perm = mActivity.checkSelfPermission(mPermission);
        if (perm != PackageManager.PERMISSION_GRANTED) {

            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                mActivity.requestPermissions(new String[]{mPermission}, REQUEST_CODE);
                return false;
            }
        }
    }

    return true;
}

/**
 * Must be called from Activity's onRequestPermissionsResult()
 */
public static void onRequestPermissionsResult(int requestCode,
                                              int[] grantResults,
                                              PermissionListener permissionListener
) {
    switch (requestCode) {
        case REQUEST_CODE: {
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                permissionListener.onPermissionGranted();
            }
            else{
                permissionListener.onPermissionDenied();
            }
            break;
        }
    }
}

}

Answer 1

所以我终于有时间解决它了。我第一次打电话给checkPermission内的onResume，这很糟糕。 onResume也在onRequestPermissionsResult之后调用。所以我将第一个电话转移到onCreate。

Android - PermissionHelper - 显示两次

1 个答案: