Android实现简易版弹钢琴效果

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package com.example.weixu.view;
 
/**
 * 音乐播放帮助类
 */
 
import java.util.HashMap;
import android.content.Context;
import android.media.AudioManager;
import android.media.SoundPool;
 
import com.example.weixu.playpanio.R;
 
public class PanioMusic {
 // 资源文件
 int Music[] = {R.raw.do1, R.raw.re2, R.raw.mi3, R.raw.fa4, R.raw.sol5,
 R.raw.la6, R.raw.si7,};
 SoundPool soundPool;
 HashMap soundPoolMap;
 
 public PanioMusic(Context context) {
 soundPool = new SoundPool(2, AudioManager.STREAM_MUSIC, 100);
 soundPoolMap = new HashMap();
 for (int i = 0; i 

package com.example.weixu.playpanio;
 
import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.Button;
 
import com.example.weixu.view.PanioMusic;
 
public class MainActivity extends Activity {
 private Button button[];// 按钮数组
 private PanioMusic utils;// 工具类
 private View parent;// 父视图
 private int buttonId[];// 按钮id
 private boolean havePlayed[];// 是否已经播放了声音，当手指在同一个按钮内滑动，且已经发声，就为true
 private View keys;// 按钮们所在的视图
 private int pressedkey[];
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 
 init();
 parent = (View) findViewById(R.id.llparent);
 parent.setClickable(true);
 
 parent.setOnTouchListener(new OnTouchListener() {
 
 @Override
 public boolean onTouch(View v, MotionEvent event) {
 int temp;
 int tempIndex;
 int pointercount;
 pointercount = event.getPointerCount();
 for (int count = 0; count = temp - 1; i--) {
   // 当在两端的按钮时，会有一边越界
   if (i <0 || i >= button.length) {
   continue;
   }
   if (isInScale(event.getX(count),
   event.getY(count), button[i])) {// 在某个按键内
   moveflag = true;
   if (i != temp) {// 在相邻按键内
   boolean laststill = false;
   boolean nextstill = false;
   // 假设手指已经从上一个位置抬起，但是没有真的抬起，所以不移位
   pressedkey[count] = -1;
   for (int j = 0; j = 0) {
   pressedkey[t] = pressedkey[t + 1];
   } else {
   pressedkey[t] = -1;
   }
   } else {
   pressedkey[t] = -1;
   }
 
   }
   for (int i = 0; i  button.getLeft() && x  button.getTop() + keys.getTop()
 && y  button[i].getLeft() && x  button[i].getTop() + keys.getTop()
  && y 

android:screenOrientation="landscape"