这代码在模拟器上运行不了

Question

问题遇到的现象和发生背景

用代码块功能插入代码，请勿粘贴截图

运行结果及报错内容

我的解答思路和尝试过的方法

我想要达到的结果
java

package com.exae.seabadman;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.DisplayMetrics;
import android.view.MotionEvent;
import android.view.View;
import android.content.Intent;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.view.View.OnTouchListener;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

public class xiangjishi extends AppCompatActivity {
private int startl,startr,startt,startb,lastX;

@Override
public void onCreate(Bundle savedInstanceState) {
    new Thread(qq).start();
    //ImageView akumo, xiogishiyo;
    // akumo = findViewById(R.id.akumo);
    //xiogishiyo=findViewById(R.id.xiogishi);
    super.onCreate(savedInstanceState);
    setContentView(R.layout.xiangjishiyoshi);
    DisplayMetrics dm = getResources().getDisplayMetrics();
    final int screenWidth = dm.widthPixels;
    final ImageButton direction = (ImageButton) findViewById(R.id.direction);

    // xx=xiogishiyo.getX();
    //dx = (int) direction.getX();


    direction.setOnTouchListener(new View.OnTouchListener() {
        int lastX, lastY;

        @Override
        public boolean onTouch(View view, MotionEvent motionEvent) {
            int x = (int) motionEvent.getX();
            int y = (int) motionEvent.getY();
            int ea = motionEvent.getAction();
            switch (ea) {
                case MotionEvent.ACTION_DOWN:
                    startl = direction.getLeft();
                    startr = direction.getRight();
                    startt = direction.getTop();
                    startb = direction.getBottom();
                    lastX = x;
                    break;
                case MotionEvent.ACTION_MOVE:
                    int dx = (int) motionEvent.getX() - lastX;
                    int l = view.getLeft() + dx;
                    int b = view.getBottom();
                    int r = view.getRight() + dx;
                    int t = view.getTop();
                    if (l < 0) {
                        l = 0;
                        r = l + view.getWidth();
                    }
                    if (r > screenWidth) {

                        r = screenWidth;
                        l = r - view.getWidth();
                    }
                    view.layout(l, t, r, b);
                    lastX = (int) motionEvent.getRawX();
                    view.postInvalidate();
                    break;
                case MotionEvent.ACTION_UP:
                    break;
            }

            return true;

        }
    });


}









final Handler hans = new Handler() {
    Float dx;
    ImageView xiogishiyo;
    ImageButton direction;


    @Override
    public void handleMessage(Message msg) {

        xiogishiyo = findViewById(R.id.xiogishi);
        direction = findViewById(R.id.direction);
        super.handleMessage(msg);
        {

            if (msg.what == 80) {
                dx = direction.getX();

                xiogishiyo.setX(dx);


            }

        }


    }


};

private Runnable qq=new Runnable() {
    @Override
    public void run() {
    try {


        while (true) {

            hans.sendMessage(hans.obtainMessage(80));
        }

    }catch (Exception e){
        e.printStackTrace();
    }

    }
};

}

java

请指出这代码不能在模拟器上运行的根本原因，并给出切实可行的解决方法，

Answer 1

把下面这个放到onCreate()里面最后

new Thread(qq).start();