android - 撤销权限 android.permission.CALL_PHONE

Question

我正在尝试使用以下代码以编程方式调用一个号码:

 String number = ("tel:" + numTxt.getText());
 Intent intent = new Intent(Intent.ACTION_CALL);
 intent.setData(Uri.parse(number));
 startActivity(intent);

我已经在 Manifest 中设置了权限:

<uses-permission android:name="android.permission.CALL_PHONE"/>

我正在使用真实设备进行测试和调试，它是带有 Android M 的 Nexus 5，我的 compileSdkVersion 是 23。我收到以下安全异常:

error: Permission Denial: starting Intent { act=android.intent.action.CALL dat=tel:xxxxxxxxxx cmp=com.android.server.telecom/.components.UserCallActivity } from ProcessRecord{cbbd7c1 5228:com.dialerTest.DialerApp/u0a96} (pid=5228, uid=10096) with revoked permission android.permission.CALL_PHONE

我在网络和这个社区中搜索了类似的 Q/A，但找不到答案。任何帮助将不胜感激。

Answer 1

权限 CALL_PHONE 属于危险权限组。
因此，如果您的应用目标 SDK 为 23 或更高版本，并且您的设备运行的是 Android 6.0 或更高版本，则您必须在应用运行时请求 CALL_PHONE 权限。

例子:

String number = ("tel:" + numTxt.getText());
mIntent = new Intent(Intent.ACTION_CALL);
mIntent.setData(Uri.parse(number));
// Here, thisActivity is the current activity
if (ContextCompat.checkSelfPermission(thisActivity,
            Manifest.permission.CALL_PHONE)
    != PackageManager.PERMISSION_GRANTED) {

    ActivityCompat.requestPermissions(thisActivity,
            new String[]{Manifest.permission.CALL_PHONE},
            MY_PERMISSIONS_REQUEST_CALL_PHONE);

    // MY_PERMISSIONS_REQUEST_CALL_PHONE is an
    // app-defined int constant. The callback method gets the
    // result of the request.
} else {
    //You already have permission
     try {
        startActivity(mIntent); 
    } catch(SecurityException e) {
       e.printStackTrace();
   }
}

当您的应用请求权限时，系统会向用户显示一个对话框。当用户响应时，系统会调用您应用的 onRequestPermissionsResult() 方法，并将用户响应传递给它。

@Override
public void onRequestPermissionsResult(int requestCode,
    String permissions[], int[] grantResults) {
  switch (requestCode) {
    case MY_PERMISSIONS_REQUEST_CALL_PHONE: {
        // If request is cancelled, the result arrays are empty.
        if (grantResults.length > 0
            && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

            // permission was granted, yay! Do the phone call

        } else {

            // permission denied, boo! Disable the
            // functionality that depends on this permission.
        }
        return;
    }

    // other 'case' lines to check for other
    // permissions this app might request
  }
}