Handler实现简单的打地鼠案例

代码如下

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import java.lang.ref.WeakReference;
import java.util.Random;


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

public  static final int CODE = 123;

private TextView mResultTextView;
private ImageView mDiglettImageView;
private  Button mStarrButton;

public int[][] mPosition = new  int[][]{
        {342,180},{432,880},
        {521,256},{429,780},
        {456,976},{145,665},
        {123,678},{564,567},
};

private  int mTotalCount;
private  int mSuccessCount;

public static final int MAX_COUNT = 10;

private DiglettHandler mHandler = new DiglettHandler(this);

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_diglett);

    initView();

    setTitle("打地鼠");

}

private void initView(){
    mResultTextView = (TextView)findViewById(R.id.text_view);
    mDiglettImageView = (ImageView)findViewById(R.id.image_view);
    mStarrButton = (Button)findViewById(R.id.start_button);

    mStarrButton.setOnClickListener(this);
    mDiglettImageView.setOnTouchListener(this);
}

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

}
private  void  start(){
    //发送消息 handler.sendmessagedelayer
    mResultTextView.setText("开始啦");
    mStarrButton.setText("游戏中.....");
    mStarrButton.setEnabled(false);
    next(0);
}

private  void  next(int delayTime){
    int position = new Random().nextInt(mPosition.length);

    Message message = Message.obtain();
    message.what =CODE;
    message.arg1 = position;

    mHandler.sendMessageDelayed(message,delayTime);
    mTotalCount ++;
}

@Override
public boolean onTouch(View v, MotionEvent event) {
    v.setVisibility(View.GONE);
    mSuccessCount ++ ;
    mResultTextView.setText("打到了"+ mSuccessCount +"只，共" + MAX_COUNT +"只.");
    return false;
}

public static class DiglettHandler extends Handler{
    public static final int RANDOM_NUBER = 500;
  public  final WeakReference<DiglettActivity> mWeakReference;

    public  DiglettHandler(DiglettActivity activity){
        mWeakReference = new WeakReference<>(activity);

    }

    @Override
    public void handleMessage(Message msg) {
        super.handleMessage(msg);
        DiglettActivity activity = mWeakReference.get();

        switch (msg.what){
            case CODE:
                if (activity.mTotalCount >MAX_COUNT){
                    activity.clear();
                    Toast.makeText(activity,"地鼠打完了！",Toast.LENGTH_LONG).show();
                    return;
                }

                int position = msg.arg1;
                activity.mDiglettImageView.setX(activity.mPosition[position][0]);
                activity.mDiglettImageView.setY(activity.mPosition[position][1]);
                activity.mDiglettImageView.setVisibility(View.VISIBLE);

                int randomTime = new Random().nextInt(RANDOM_NUBER) + RANDOM_NUBER;

                activity.next(randomTime);
                break;
        }
    }
}
private  void clear(){
    mTotalCount = 0;
    mSuccessCount = 0;
    mDiglettImageView.setVisibility(View.GONE);
    mStarrButton.setText("点击开始");
    mStarrButton.setEnabled(true);

}
}

按照步骤，先实例化控件，再将需要的数据写出来，点击之后到start方法，再到next方法，后来用handler来传递数据，完成后接受，然后一系列方式是为了界面更加好看完整。
添加链接描述
这个案例的解析相同，更加完整