23 广播服务结合音乐Demo5

MainActivity.java

package com.dmy.demo5;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;

public class MainActivity extends Activity {

    private TextView time;
    private SeekBar seekBar;
    private Button play;
    private Button stop;
    private BroadcastReceiver receiver;
    boolean onTouch =false;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化控件
        init();
    }

    private void init() {
        time = (TextView) findViewById(R.id.time);
        seekBar = (SeekBar) findViewById(R.id.seek_bar);
        play = (Button) findViewById(R.id.play);
        stop = (Button) findViewById(R.id.stop);
        //为进度条设置监听
        seekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

            //用户停止进度条操作
            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                // TODO Auto-generated method stub
                Intent intent = new Intent();
                intent.setAction(com.dmy.demo5.Menu.SERVER_INTENT);
                //flase意义表示播放音乐 true为暂停
                intent.putExtra(com.dmy.demo5.Menu.IS_PAUSE, false);
                intent.putExtra(Menu.POS, seekBar.getProgress());
                sendBroadcast(intent);
                onTouch=false;
            }
            //用户手指点击点击
            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
                //给服务发送一个暂停状态过去
                Intent intent = new Intent();
                intent.setAction(com.dmy.demo5.Menu.SERVER_INTENT);
                intent.putExtra(com.dmy.demo5.Menu.IS_PAUSE, true);
                //-1表示不改变当前进度
                intent.putExtra(com.dmy.demo5.Menu.POS, -1);
                 onTouch = true;
                sendBroadcast(intent);
            }

            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {

            }
        });

        receiver = new BroadcastReceiver() {

            @Override
            public void onReceive(Context context, Intent intent) {

                // 音乐的总长度
                int total = intent.getIntExtra(com.dmy.demo5.Menu.TOTAL, 0);
                // 音乐当前位置
                int pos = intent.getIntExtra(com.dmy.demo5.Menu.POS, 0);
                // 音乐总分钟
                int totalM = total / 1000 / 60;
                // 音乐总分钟剩余秒
                int totalS = total / 1000 % 60;

                // 音乐当前分钟
                int posM = pos / 1000 / 60;
                // 音乐总分钟剩余秒
                int posS = pos / 1000 % 60;

                StringBuilder sb = new StringBuilder();
                sb.append(posM / 10)
                .append(posM % 10)
                .append(":")
                .append(posS / 10)
                .append(posS % 10)
                .append("/")
                .append(totalM / 10).append(totalM % 10).append(":").append(totalS / 10).append(totalS % 10);
                time.setText(sb);
                seekBar.setMax(total);
                if (!onTouch) {
                    seekBar.setProgress(pos);

                }
            }

        };

        Intent intent = new Intent("com.dmy.demo5.MyServer");
        // 6.0需要写上包
        intent.setPackage(getPackageName());
        // 开启服务
        startService(intent);

        //注册广播
        IntentFilter filter = new IntentFilter();
        filter.addAction(com.dmy.demo5.Menu.UI_INTENT);
        registerReceiver(receiver, filter);
    }

    public void play(View v) {
        boolean flag = false;
        // 如果当前按钮的内容是暂停则返回true
        flag = "暂停".equals(play.getText());
        // 给按钮设置新的文字
        String newFlag = flag ? "播放" : "暂停";
        play.setText(newFlag);
        Intent intent = new Intent();
        intent.setAction(com.dmy.demo5.Menu.SERVER_INTENT);
        intent.putExtra(com.dmy.demo5.Menu.IS_PAUSE, flag);
        //-1表示不改变当前进度
        intent.putExtra(com.dmy.demo5.Menu.POS, -1);
        sendBroadcast(intent);
    }
    public void stop(View v) {

    }



}

Menu.java

package com.dmy.demo5;

public class Menu {
    // 在itent中传入值 boolean如果为true是暂停状态的按钮
    public static final String IS_PAUSE = "isPause";
    // 判断是否按下停止状态
    public static final String IS_STOP = "is_stop";
    // 音乐当前位置
    public static final String POS = "pos";
    // 发送服务广播的意图
    public static final String SERVER_INTENT = "updata.music.server";
    // 发送UI界面广播的意图
    public static final String UI_INTENT = "updata.music.ui";
    // 音乐总时长
    public static final String TOTAL = "total";
}

MyServer.java

package com.dmy.demo5;

import java.io.IOException;

import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.media.MediaPlayer;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;

public class MyServer extends Service {

    private MediaPlayer mp;
    int pos = 0;
    // 用于接收音乐播放时用户点击按钮和拉动滚动条
    private BroadcastReceiver stateReceiver;
    boolean flagStop = false;

    @Override
    public void onCreate() {
        super.onCreate();
        mp = MediaPlayer.create(getApplicationContext(), R.raw.wlxq);
        // 初始化广播接受者
        initBroadCast();
        // 初始化线程不断发送消息 改变UI
        initThread();
    }

    // 初始化线程不断发送消息 改变UI
    public void initThread() {
        new Thread() {
            public void run() {
                while (true) {
                    Intent intent = new Intent(Menu.UI_INTENT);
                    if (mp != null) {
                        intent.putExtra(Menu.TOTAL, mp.getDuration());
                        intent.putExtra(Menu.POS, mp.getCurrentPosition());
                    }

                    if (!flagStop) {

                        sendBroadcast(intent);
                    }

                    try {
                        sleep(100);
                    } catch (InterruptedException e) {

                        e.printStackTrace();
                    }
                }
            };

        }.start();
    }

    private void initBroadCast() {
        stateReceiver = new BroadcastReceiver() {

            @Override
            public void onReceive(Context context, Intent intent) {


                // 如果为true 现在的状态是用户点击了了暂停按钮
                Boolean is_pause = intent.getBooleanExtra(Menu.IS_PAUSE, false);
                if (is_pause && mp != null) {
                    mp.pause();
                } else if (mp != null) {
                    pos = intent.getIntExtra(Menu.POS, -1);
                    mp.seekTo(pos);
                    // 否则用户点了播放按钮
                    mp.start();
                }
            }

        };
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        // 注册广播接受者
        IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction("updata.music.server");
        registerReceiver(stateReceiver, intentFilter);
        Log.e("fmy", "onStartCommand");
        return START_NOT_STICKY;

    }

    @Override
    public IBinder onBind(Intent intent) {

        return new MyBinder();

    }

    class MyBinder extends Binder {
        public MyServer getServer() {
            return MyServer.this;
        }
    }

}

清单文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.dmy.demo5"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="16"
        android:targetSdkVersion="21" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <service android:name="com.dmy.demo5.MyServer">
            <intent-filter>
                <action android:name="com.dmy.demo5.MyServer"></action>
            </intent-filter>
        </service>
    </application>

</manifest>