原理：借助Android系统提供的ImageReader读取当前屏幕，然后转化为Bitmap对象，Bitmap像素宽高正好和当前屏幕一致，然后调用Bitmap中的getPixel(x, y)方法获取目标点的坐标

创建屏幕扫描器

public class MainActivity extends AppCompatActivity {
   

    private static final int REQUEST_MEDIA_PROJECTION = 1;
    private MediaProjectionManager mMediaProjectionManager;
    private MediaProjection mMediaProjection;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
   
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        rootCmd();
        mMediaProjectionManager = (MediaProjectionManager) getSystemService(Context.MEDIA_PROJECTION_SERVICE);
        if (mMediaProjectionManager != null) {
   
            startActivityForResult(mMediaProjectionManager.createScreenCaptureIntent(), REQUEST_MEDIA_PROJECTION);
        }
    }

    /**
     * 获取root权限，研究按键精灵中模拟按键功能的童鞋可以添加
     */
    public void rootCmd() {
   
        Process process = null;
        DataOutputStream os = null;
        try {
   
            process = Runtime.getRuntime().exec("su");
            os = new DataOutputStream(process.getOutputStream());
            os