Android使用Handler实现打地鼠游戏

本文实例为大家分享了Android使用Handler实现打地鼠的具体代码，供大家参考，具体内容如下

1.实现效果

如下图所示：

2.代码实现

新建一个名为DiglettDemo的项目，activity_main.xml代码如下：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  tools:context=".MainActivity">

  <ImageView
    android:id="@+id/imageView"
    android:layout_width="80dp"
    android:layout_height="80dp"
    android:src="@drawable/diglett"
    android:visibility="gone" />

  <Button
    android:id="@+id/button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_centerHorizontal="true"
    android:layout_marginBottom="45dp"
    android:text="点击开始" />

  <TextView
    android:id="@+id/textView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="20dp"
    android:textColor="#ff0000"
    android:textSize="20sp" />
</RelativeLayout>

MainActivity.class代码如下：

public class MainActivity extends AppCompatActivity implements View.OnClickListener, View.OnTouchListener {

  public static final int CODE = 999;
  public static final int RANDOM_NUMBER = 500;
  private TextView mTextView;
  private Button mButton;
  private ImageView mImageView;

  /**
   * 定义地鼠的位置
   */
  public int[][] mPosition = new int[][]{
      {342, 180}, {432, 880}, {521, 256}, {429, 780},
      {456, 976}, {145, 665}, {123, 678}, {564, 567},
  };

  private int mTotalCount, mSuccessCount = 0;
  public static final int MAX_COUNT = 10;

  private MyHandler mMyHandler = new MyHandler(this);

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    initView();
  }

  private void initView() {
    mTextView = findViewById(R.id.textView);
    mButton = findViewById(R.id.button);
    mImageView = findViewById(R.id.imageView);
    mButton.setOnClickListener(this);
    mImageView.setOnTouchListener(this);
  }

  @Override
  public void onClick(View v) {
    switch (v.getId()) {
      case R.id.button:
        start();
        break;
    }
  }

  private void start() {
    mTextView.setText("游戏开始了！");
    mButton.setText("游戏中...");
    mButton.setEnabled(false);
    //发送消息
    next(RANDOM_NUMBER);
  }

  private void next(int delayTime) {
    //产生一个0——数组长度的随机数
    int positon = new Random().nextInt(mPosition.length);
    Message message = Message.obtain();
    message.what = CODE;
    message.arg1 = positon;
    mMyHandler.sendMessageDelayed(message, delayTime);
    //每发送一次消息，总数就加一
    mTotalCount++;
  }

  /**
   * 图片点击事件
   * @param v
   * @param event
   * @return
   */
  @Override
  public boolean onTouch(View v, MotionEvent event) {
    //每次触碰到地鼠，则地鼠消失，打到地鼠的数量加一
    v.setVisibility(View.GONE);
    mSuccessCount++;
    mTextView.setText("打到了" + mSuccessCount + "只，共" + MAX_COUNT + "只");
    return false;
  }

  public static class MyHandler extends Handler {
    private final WeakReference<MainActivity> mWeakReference;

    public MyHandler(MainActivity activity) {
      this.mWeakReference = new WeakReference<>(activity);
    }

    @Override
    public void handleMessage(Message msg) {
      MainActivity activity = mWeakReference.get();
      super.handleMessage(msg);
      switch (msg.what) {
        case CODE:
          if (activity.mTotalCount > MAX_COUNT) {
            //游戏结束，初始化游戏
            activity.clear();
            Toast.makeText(activity, "地鼠打完了！", Toast.LENGTH_SHORT).show();
            return;
          } else {
            int position = msg.arg1;
            activity.mImageView.setX(activity.mPosition[position][0]);
            activity.mImageView.setY(activity.mPosition[position][1]);
            activity.mImageView.setVisibility(View.VISIBLE);
            //在随机位置上显示地鼠之后，再次发送消息
            int randomTime = new Random().nextInt(RANDOM_NUMBER) + RANDOM_NUMBER;
            activity.next(randomTime);
          }
          break;
      }
    }
  }

  /**
   * 游戏结束，初始化游戏
   */
  private void clear() {
    mTotalCount = 0;
    mSuccessCount = 0;
    mImageView.setVisibility(View.GONE);
    mButton.setText("点击开始");
    mButton.setEnabled(true);
  }
}

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