package com.ww.rr; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.res.AssetFileDescriptor; import android.content.res.AssetManager; import android.media.AudioManager; import android.media.MediaPlayer; import android.os.Bundle; import android.os.Environment; import android.os.Handler; import android.support.v7.app.AppCompatActivity; import android.telephony.PhoneStateListener; import android.telephony.TelephonyManager; import android.util.Log; import android.view.View; import android.widget.AdapterView; import android.widget.Button; import android.widget.ListView; import android.widget.ProgressBar; import android.widget.SeekBar; import android.widget.SimpleAdapter; import android.widget.TextView; import java.io.File; import java.io.IOException; import java.util.ArrayList; import java.util.Collections; import java.util.HashMap; import java.util.List; import java.util.Map; import java.io.File; import java.util.ArrayList; import java.util.Collections; import java.util.HashMap; import java.util.List; import java.util.Map; import android.app.Activity; /** * * 2、Open Core 的具体功能 1、多媒体文件的播放、下载,包括:3GPP,MPEG-4,AAC 和 MP3 containers。 2、流媒体文件的下载、实时播放,包括:3GPP,HTTP 和 RTSP/RTP。 3、动态视频和静态图像的编码、解码,例如:MPEG-4,H.263 和 AVC (H.264),JPEG。 4、语音编码格式:MP3,AAC,AAC+。 5、视频和图像格式:3GPP,MPEG-4 和 JPEG。 6、视频会议:基于 H324-M 标准。 * **/ public class AdjustVolumeActivity extends Activity implements View.OnClickListener { private Button play = null; private Button down = null; private Button up = null; private ProgressBar pb = null; private int maxVolume = 50; // 最大音量值 private int curVolume = 20; // 当前音量值 private int stepVolume = 0; // 每次调整的音量幅度 private MediaPlayer mediaPlayer = null;// 播放器 private AudioManager audioMgr = null; // Audio管理器,用了控制音量 private AssetManager assetMgr = null; // 资源管理器 private final String musicName = "hehe.mp3"; private TextView nameTextView; private SeekBar seekBar; private ListView listView; private List<Map<String, String>> data; private int current; private MediaPlayer player; private Handler handler = new Handler(); private Button ppButton; private boolean isPause; private boolean isStartTrackingTouch; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_adjust_volume); // 初始化播放器、音量数据等相关工作 initPlayWork(); // 初始化视图 initUI(); nameTextView = (TextView) findViewById(R.id.name); seekBar = (SeekBar) findViewById(R.id.seekBar); listView = (ListView) findViewById(R.id.list); ppButton = (Button) findViewById(R.id.pp); //创建一个音乐播放器 player = new MediaPlayer(); //显示音乐播放列表 generateListView(); //进度条监听器 seekBar.setOnSeekBarChangeListener(new MySeekBarListener()); //播放器监听器 player.setOnCompletionListener(new MyPlayerListener()); //意图过滤器 IntentFilter filter = new IntentFilter(); //播出电话暂停音乐播放 filter.addAction("Android.intent.action.NEW_OUTGOING_CALL"); registerReceiver(new PhoneListener(), filter); try { //创建一个电话服务 TelephonyManager manager = (TelephonyManager) getSystemService(TELEPHONY_SERVICE); //监听电话状态,接电话时停止播放 manager.listen(new MyPhoneStateListener(), PhoneStateListener.LISTEN_CALL_STATE); }catch (Exception e){ // e.fillInStackTrace(); Log.e("www",e.toString()); } } /** * 初始化UI */ private void initUI() { // play = (Button) findViewById(R.id.play); down = (Button) findViewById(R.id.down); up = (Button) findViewById(R.id.up); // play.setOnClickListener(this); down.setOnClickListener(this); up.setOnClickListener(this); // 设置进度条 pb = (ProgressBar) findViewById(R.id.progress); pb.setMax(maxVolume); pb.setProgress(curVolume); } /** * 初始化播放器、音量数据等相关工作 */ private void initPlayWork() { audioMgr = (AudioManager) getSystemService(Context.AUDIO_SERVICE); // 获取最大音乐音量 maxVolume = audioMgr.getStreamMaxVolume(AudioManager.STREAM_MUSIC); // 初始化音量大概为最大音量的1/2 curVolume = maxVolume / 2; // 每次调整的音量大概为最大音量的1/6 stepVolume = maxVolume / 6; mediaPlayer = new MediaPlayer(); assetMgr = this.getAssets(); } /** * 准备播放音乐 * * @param */ private void prepareAndPlay() { try { // 打开指定音乐文件 AssetFileDescriptor afd = assetMgr.openFd(musicName); mediaPlayer.reset(); // 使用MediaPlayer加载指定的声音文件。 mediaPlayer.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength()); // 准备声音 mediaPlayer.prepare(); // 播放 mediaPlayer.start(); } catch (IOException e) { e.printStackTrace(); } } /** * 调整音量 */ private void adjustVolume() { audioMgr.setStreamVolume(AudioManager.STREAM_MUSIC, curVolume, AudioManager.FLAG_PLAY_SOUND); } @Override public void onClick(View v) { int id = v.getId(); switch (id) { // case R.id.play://按下播放按钮 // prepareAndPlay(); // break; case R.id.up://按下增大音量按钮 curVolume += stepVolume; if (curVolume >= maxVolume) { curVolume = maxVolume; } pb.setProgress(curVolume); break; case R.id.down://按下减小音量按钮 curVolume -= stepVolume; if (curVolume <= 0) { curVolume = 0; } pb.setProgress(curVolume); break; default: break; } // 调整音量 adjustVolume(); } private final class MyPhoneStateListener extends PhoneStateListener { public void onCallStateChanged(int state, String incomingNumber) { pause(); } } private final class MyPlayerListener implements MediaPlayer.OnCompletionListener { //歌曲播放完后自动播放下一首歌曲 public void onCompletion(MediaPlayer mp) { next(); } } public void next(View view) { next(); } public void previous(View view) { previous(); } private void previous() { current = current - 1 < 0 ? data.size() - 1 : current - 1; play(); } private void next() { current = (current + 1) % data.size(); play(); } private final class MySeekBarListener implements SeekBar.OnSeekBarChangeListener { //移动触发 public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { } //起始触发 public void onStartTrackingTouch(SeekBar seekBar) { isStartTrackingTouch = true; } //结束触发 public void onStopTrackingTouch(SeekBar seekBar) { player.seekTo(seekBar.getProgress()); isStartTrackingTouch = false; } } private void generateListView() { List<File> list = new ArrayList<File>(); //获取sdcard中的所有歌曲 findAll(Environment.getExternalStorageDirectory(), list); //播放列表进行排序,字符顺序 Collections.sort(list); data = new ArrayList<Map<String, String>>(); for (File file : list) { Map<String, String> map = new HashMap<String, String>(); map.put("name", file.getName()); map.put("path", file.getAbsolutePath()); data.add(map); } SimpleAdapter adapter = new SimpleAdapter(this, data, R.layout.item, new String[] { "name" }, new int[] { R.id.mName }); listView.setAdapter(adapter); listView.setOnItemClickListener(new MyItemListener()); } private final class MyItemListener implements AdapterView.OnItemClickListener { public void onItemClick(AdapterView<?> parent, View view, int position, long id) { current = position; play(); } } private void play() { try { //重播 player.reset(); //获取歌曲路径 player.setDataSource(data.get(current).get("path")); //缓冲 player.prepare(); //开始播放 player.start(); //显示歌名 nameTextView.setText(data.get(current).get("name")); //设置进度条长度 seekBar.setMax(player.getDuration()); //播放按钮样式 ppButton.setText("||"); //发送一个Runnable, handler收到之后就会执行run()方法 handler.post(new Runnable() { public void run() { // 更新进度条状态 if (!isStartTrackingTouch) seekBar.setProgress(player.getCurrentPosition()); // 1秒之后再次发送 handler.postDelayed(this, 1000); } }); } catch (Exception e) { e.printStackTrace(); } } private void findAll(File file, List<File> list) { File[] subFiles = file.listFiles(); if (subFiles != null) for (File subFile : subFiles) { if (subFile.isFile() && subFile.getName().endsWith(".mp3")) list.add(subFile); else if (subFile.isDirectory())//如果是目录 findAll(subFile, list); //递归 } } public void pp(View view) { //默认从第一首歌曲开始播放 if (!player.isPlaying() && !isPause) { play(); return; } Button button = (Button) view; //暂停/播放按钮 if ("||".equals(button.getText())) { pause(); button.setText("▶"); } else { resume(); button.setText("||"); } } private void resume() { if (isPause) { player.start(); isPause = false; } } private void pause() { if (player != null && player.isPlaying()) { player.pause(); isPause = true; } } private final class PhoneListener extends BroadcastReceiver { public void onReceive(Context context, Intent intent) { pause(); } } protected void onResume() { super.onResume(); resume(); } }
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#FFFFFF"> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:layout_marginTop="22dp" android:layout_marginLeft="22dp" android:layout_marginRight="22dp" android:layout_marginBottom="22dp"> <TextView android:id="@+id/name" android:layout_width="fill_parent" android:layout_height="wrap_content" /> <SeekBar android:id="@+id/seekBar" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginBottom="5dp" /> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content"> </LinearLayout> <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginBottom="20dp" android:layout_marginTop="15dp" > <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="|◀" android:onClick="previous" /> <Button android:id="@+id/pp" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="▶" android:onClick="pp" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="▶|" android:onClick="next" /> <Button android:id="@+id/down" android:layout_marginLeft="22dp" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="减小" /> <ProgressBar android:id="@+id/progress" style="?android:attr/progressBarStyleHorizontal" android:layout_width="150dip" android:layout_height="wrap_content" android:layout_marginTop="15dp" /> <Button android:id="@+id/up" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="增大" /> </LinearLayout> <ListView android:id="@+id/list" android:layout_width="fill_parent" android:layout_height="fill_parent" /> </LinearLayout> </RelativeLayout><1>在新建一个item文件XIM
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content" android:padding="10dp" > <TextView android:id="@+id/mName" android:layout_width="fill_parent" android:layout_height="wrap_content" android:textSize="15sp" /> </LinearLayout>
<在平板运行程序>