java - 无法即时看到危险权限的对话框

Question

我尝试在我的应用上测试我的 GPS 权限。

我已经构建了权限管理器并在 list 中添加了 GPS 权限，因为 GPS 是一个危险的权限。但是，当我运行我的应用程序时，我看不到此权限的任何对话框，因为应用程序向我表示我没有允许此权限，即使我从来没有机会在对话框上允许或阻止此权限。

非常感谢任何形式的帮助，这些是我的类(class):

list 权限

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

主要 Activity

public class MainActivity extends AppCompatActivity {

public static final int GPS=1;
public static final String gpsFinePermission="Manifest.permission.ACCESS_FINE_LOCATION";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    PermissionManager.check(MainActivity.this, gpsFinePermission, GPS);
    System.out.println("1");
}


@Override
protected void onStart() {
    //startService(new Intent(this,CurrentLocation.class));
    super.onStart();
    System.out.println("2");
}

@Override//when user allowed OR denied a permission
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    System.out.println("3");
    if(grantResults[0] == PackageManager.PERMISSION_GRANTED && requestCode == GPS){//Allowed
        Toast.makeText(MainActivity.this, "GPS permission granted", Toast.LENGTH_LONG).show();
        System.out.println("4");
    }else
        Toast.makeText(MainActivity.this, "GPS permission is IMPORTANT for this app", Toast.LENGTH_LONG).show();
    }
}

权限管理器

public class PermissionManager {
//A method that can be called from any Activity, to check for specific permission
public static void check(Activity activity, String permission, int requestCode){
    System.out.println("5");
    //If requested permission isn't Granted yet
    if (ActivityCompat.checkSelfPermission(activity, permission) != PackageManager.PERMISSION_GRANTED) {
        System.out.println("6");
        //Request permission from user
        ActivityCompat.requestPermissions(activity,new String[]{permission},requestCode);
    }
} 
}

Answer 1

您应该从 Manifest.permission 类中获取一个字符串。但是您将 Manifest.permission.ACCESS_FINE_LOCATION 作为字符串传递。你不应该使用这个。

public static final String gpsFinePermission="Manifest.permission.ACCESS_FINE_LOCATION";

使用这个。

public static final String gpsFinePermission= Manifest.permission.ACCESS_FINE_LOCATION;