Android开发---音乐播放器（Activity实现）

上一篇我们讲述了如何发送广播，那么将广播发送之后，该如何接收？谁负责接收？怎么接受？

直接看代码：

package com.lmy.lesson_10;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.media.AudioTrack;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.test.IsolatedContext;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.AdapterView.OnItemClickListener;
import lmyPackage.LrcModel;
import lmyPackage.Model;

public class MainActivity extends Activity implements OnClickListener {

	// 负责交互的动作
	Intent intent;
	// 列表对象
	ListView mylist;
	// 适配器
	MyAdatpter myadapter;
	// 扫描
	ScanMusic scan;
	// 动态数组
	ArrayList<Model> arrlist;
	// 多媒体系统类
	MediaPlayer media;
	// 播放/下一曲/上一曲
	ImageView play_img, recend_img, next_img, repeat_img;
	// 是否播放
	boolean isplay;
	// 时间和歌词
	TextView stop_time, start_time, text_gc;
	// 进度条
	SeekBar my_seekbar;
	// 广播接收
	MyBrodcastRecriver mybrodcast;
	ArrayList<String> context_song = new ArrayList<String>();
	ArrayList<String> context_singer = new ArrayList<String>();
	ArrayList<String> context_path = new ArrayList<String>();
	// 循环标志
	int repeatState = 0;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		intent = new Intent();
		intent.setClass(MainActivity.this, MySeriver.class);
		startService(intent);

		// 播放列表
		mylist = (ListView) findViewById(R.id.music_list);
		// 上一曲
		recend_img = (ImageView) findViewById(R.id.previous_music);
		// 重复播放
		repeat_img = (ImageView) findViewById(R.id.repeat_music);
		// 播放
		play_img = (ImageView) findViewById(R.id.play_music);
		
		// 下一曲
		next_img = (ImageView) findViewById(R.id.next_music);
		// 歌曲现时时间
		start_time = (TextView) findViewById(R.id.start_time);
		// 歌曲总时间
		stop_time = (TextView) findViewById(R.id.stop_time);
		// 进度条
		my_seekbar = (SeekBar) findViewById(R.id.bar_time);
		// 歌词
		text_gc = (TextView) findViewById(R.id.text_gc);
		
		mybrodcast = new MyBrodcastRecriver();
		zhuce();
		isplay = false;
		//适配器
		myadapter = new MyAdatpter();
		scan = new ScanMusic();
		arrlist = scan.query(arrlist, this);

		for (int i = 0; i < arrlist.size(); i++) {
			context_song.add(arrlist.get(i).getText_song());
			context_singer.add(arrlist.get(i).getText_singer());
			context_path.add(arrlist.get(i).getPath());
			
		}
	
		// 监听事件
		play_img.setOnClickListener(this);
		recend_img.setOnClickListener(this);
		next_img.setOnClickListener(this);
		repeat_img.setOnClickListener(this);
		

		mylist.setAdapter(myadapter);
		mylist.setOnItemClickListener(new OnItemClickListener() {

			@Override
			public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
				// TODO Auto-generated method stub
				Intent intent = new Intent();
				intent.setAction("ACTION_INDEX");
				intent.putExtra("index", position);
				sendBroadcast(intent);
			}

		});

		my_seekbar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

			@Override
			public void onStopTrackingTouch(SeekBar seekBar) {
				// TODO Auto-generated method stub

			}

			@Override
			public void onStartTrackingTouch(SeekBar seekBar) {
				// TODO Auto-generated method stub

			}

			//拖动进度条事件
			@Override
			public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
				// TODO Auto-generated method stub
				if (fromUser == true) {
					Intent intent1 = new Intent();
					intent1.setAction("ACTION_SEEKBAR_DRANG");
					intent1.putExtra("progress", progress);
					sendBroadcast(intent1);
				}
			}
		});
	}

	class MyAdatpter extends BaseAdapter {

		@Override
		public int getCount() {
			// TODO Auto-generated method stub
			return context_song.size();
		}

		@Override
		public Object getItem(int position) {
			// TODO Auto-generated method stub
			return context_song.get(position);
		}

		@Override
		public long getItemId(int position) {
			// TODO Auto-generated method stub
			return position;
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			// TODO Auto-generated method stub
			ViewHolder viewholder;
			if (convertView == null) {
				viewholder = new ViewHolder();
				convertView = LayoutInflater.from(MainActivity.this).inflate(R.layout.item, null);
				viewholder.text_singer = (TextView) convertView.findViewById(R.id.text_singer);
				viewholder.text_song = (TextView) convertView.findViewById(R.id.text_song);

				
				convertView.setTag(viewholder);

			} else {
				viewholder = (ViewHolder) convertView.getTag();
			}
			viewholder.text_singer.setText("" + context_singer.get(position));
			viewholder.text_song.setText("" + context_song.get(position));

			return convertView;
		}

	}

	static class ViewHolder {
		TextView text_song, text_singer;

	}

	@Override
	public void onClick(View v) {
		// TODO Auto-generated method stub
		//判断当前点击事件
		switch (v.getId()) {
		case R.id.play_music:
			isplay = !isplay;
			if (isplay == true) {
				play_img.setBackgroundResource(R.drawable.play_selector);
			} else {
				play_img.setBackgroundResource(R.drawable.pause_selector);
			}
			MusicPaly(isplay);
			break;
		case R.id.previous_music:
			NextMuisc(0);

			break;
		case R.id.next_music:
			NextMuisc(1);
			break;
		case R.id.repeat_music:
			Choosemention();
			break;

	default:
			break;
		}
	}

	public void MusicPaly(boolean isplay) {
		Intent intent = new Intent();
		intent.setAction("ACTION_ISPLAY");
		intent.putExtra("isplay", isplay);
		sendBroadcast(intent);

	}

	public void NextMuisc(int num) {
		Intent intent = new Intent();
		intent.setAction("ACTION_NEXT");
		intent.putExtra("next", num);
		sendBroadcast(intent);

	}
	public void Choosemention(){
		
		switch (repeatState) {
		case 0:
			repeat_img.setBackgroundResource(R.drawable.repeat_all_selector);	
			repeatState++;
			repeatState%=3;
			break;
			case 1:
				repeat_img.setBackgroundResource(R.drawable.repeat_current_selector);	
				repeatState++;
				repeatState%=3;
			break;
			case 2:
				repeat_img.setBackgroundResource(R.drawable.shuffle_selector);			
				repeatState++;
				repeatState%=3;
    		break;
			
		default:
			break;
		}
		Setmention();
		
	}
	public void Setmention(){
		Intent intent =new Intent();
		intent.setAction("ACTION_MENTION");
		intent.putExtra("mention", repeatState);
		sendBroadcast(intent);
	}

	class MyBrodcastRecriver extends BroadcastReceiver {

		@Override
		public void onReceive(Context context, Intent intent) {
			// TODO Auto-generated method stub
			//得到歌曲总时间
			if (intent.getAction().equals("ACTION_ALLTIME")) {
				int maxtime = intent.getIntExtra("action_time", 0);
				my_seekbar.setMax(maxtime);
				stop_time.setText(setTime(maxtime));
			} //得到歌曲现在播放时间
			else if (intent.getAction().equals("ACTION_CURRENTTIME")) {
				int Currentime = intent.getIntExtra("action_currentime", 0);
				my_seekbar.setProgress(Currentime);
				start_time.setText(setTime(Currentime));

			}//得到歌词显示进度
			else if(intent.getAction().equals("ACTION_TEXTGC")){
				String str_lrc = intent.getStringExtra("gc");
				text_gc.setText(str_lrc);
			}

		}

	}

	public void zhuce() {
		//描述Intent的属性
		IntentFilter mintentfilter = new IntentFilter();
		mintentfilter.addAction("ACTION_ALLTIME");
		mintentfilter.addAction("ACTION_CURRENTTIME");
		mintentfilter.addAction("ACTION_TEXTGC");
		registerReceiver(mybrodcast, mintentfilter);

	}

	public String setTime(int time) {
		time /= 1000;
		int minute = time / 60;
		int hour = minute / 60;
		int second = time % 60;
		minute %= 60;
		return String.format("%02d:%02d", minute, second);

	}

}

至此，音乐播放器的项目我们也已经算是告一段落了，包括之后的后续的功能实现（联网下载、联网搜歌等）在日后也将为大家一一讲解....See you