Question

我正在开发Android应用程序，我需要在上传联系人之前询问用户的联系人权限。以下是我用于@Override public boolean onTouch(View v, MotionEvent event) { switch (event.getActionMasked()) { case MotionEvent.ACTION_DOWN: dX = v.getX() - event.getRawX(); dY = v.getY() - event.getRawY(); lastAction = MotionEvent.ACTION_DOWN; break; case MotionEvent.ACTION_MOVE: //remove this v.setY() line v.setX(event.getRawX() + dX); lastAction = MotionEvent.ACTION_MOVE; break; case MotionEvent.ACTION_UP: if (lastAction == MotionEvent.ACTION_DOWN) Toast.makeText(MainActivity.this, "Clicked!", Toast.LENGTH_SHORT).show(); break; default: return false; } return true; }的联系人权限的代码。

但问题是我需要每次都要求联系人权限，甚至低于Android M。如何申请适用于所有SDK版本的联系人权限？

Build.VERSION.SDK_INT >= Build.VERSION_CODES.M

Answer 1

创建一个显示权限请求对话框的方法，该对话框始终显示对话框，但仅调用Android M及更高版本上的权限API：

public void showDialog() {
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("Contacts access needed");
    builder.setPositiveButton(android.R.string.ok, null);
    builder.setMessage("please confirm Contacts access");
    builder.setOnDismissListener(new DialogInterface.OnDismissListener() {
        @Override
        public void onDismiss(DialogInterface dialog) {
            // Only call the permission request api on Android M
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                requestPermissions(new String[]{Manifest.permission.READ_CONTACTS}, PERMISSION_REQUEST_CONTACT);
            }
        }
    });
    builder.show();
}

然后在Android M及以上版本中，只在需要时调用它，在M下面，总是调用它：

public void askForContactPermission(){
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        if (ContextCompat.checkSelfPermission(this,Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED) {
            if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.READ_CONTACTS)) {
                showDialog();
            }
        }
    } else {
        showDialog();
    }
}

所有Android版本中的联系权限

1 个答案: