23 广播服务结合音乐Demo5

时间：2024-04-10 10:36:04

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>

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