我是 Android Studio 的新手，我只想拖動(dòng) TextView。但是，當(dāng)我嘗試獲取RelativeLayout 的LayoutParams 時(shí)，我得到了一個(gè)我不使用的類(ContraintLayout) 的ClassCastException。    import androidx.appcompat.app.AppCompatActivity;    import android.os.Bundle;    import android.view.MotionEvent;    import android.view.View;    import android.widget.RelativeLayout;    import android.widget.TextView;    public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        TextView textView=findViewById(R.id.textView);        textView.setOnTouchListener(onTouchListener());    }    private View.OnTouchListener onTouchListener(){        return new View.OnTouchListener(){            @Override            public boolean onTouch(View view, MotionEvent event){                final int x= (int)event.getRawX();                final int y= (int)event.getRawY();                RelativeLayout.LayoutParams params= (RelativeLayout.LayoutParams)view.getLayoutParams();//<--ERROR                return true;            }        };    }}這是錯(cuò)誤消息E/InputEventReceiver: Exception dispatching input event.E/MessageQueue-JNI: Exception in MessageQueue callback: handleReceiveCallbackE/MessageQueue-JNI: java.lang.ClassCastException: androidx.constraintlayout.widget.ConstraintLayout$LayoutParams cannot be cast to android.widget.RelativeLayout$LayoutParams    at com.example.test.MainActivity$1.onTouch(MainActivity.java:28)