android mediaPlayer 实例 附项目
/**
菜鸟交流学习所作。实现功能：左右滑动换上、下一曲；上下滑动切换音量；点击、双击播放暂停；随机播放与单曲循环；切换播放路径等。
*/
package com.simplemedia;
import java.io.File;
import java.io.FileInputStream;
import java.io.FilenameFilter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.util.Log;
import android.view.GestureDetector;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity implements OnTouchListener {
?private String? songRootPath,songpath,rootPath = "/mnt/sdcard/", path, currentRootPath = "/mnt/sdcard/";
?private int currentSong = 0, songCount, id = -1;
?boolean isPaused=false,isStopped=false;
?private ListView showPathList;
?public MediaPlayer mediaPlayer;
?GestureDetector detector;
?public AudioManager audioManager;
?TextView songNamText, stateText, showPathText;
?LinearLayout detectorLayout, layoutParent;
?File currentParent;
?File[] currentFiles;
?ImageButton lastSongBtn, nextSongBtn, voicMaxBtn, voiceDefaultBtn,
???voiceMinBtn, cycleBtn, randomBtn, pathBtn, stopBtn, playBtn,
???pauseBtn;
?private List<String> songList = new ArrayList<String>();
?void init() {
??songNamText = (TextView) findViewById(R.id.songNamText);
??playBtn = (ImageButton) findViewById(R.id.playBtn);
??pauseBtn = (ImageButton) findViewById(R.id.pauseBtn);
??stopBtn = (ImageButton) findViewById(R.id.stopBtn);
??cycleBtn = (ImageButton) findViewById(R.id.cycleBtn);
??randomBtn = (ImageButton) findViewById(R.id.randomBtn);
??pathBtn = (ImageButton) findViewById(R.id.pathBtn);
??lastSongBtn = (ImageButton) findViewById(R.id.lastSongBtn);
??nextSongBtn = (ImageButton) findViewById(R.id.nextSongBtn);
??voicMaxBtn = (ImageButton) findViewById(R.id.voicMaxBtn);
??voiceMinBtn = (ImageButton) findViewById(R.id.voiceMinBtn);
??voiceDefaultBtn = (ImageButton) findViewById(R.id.voiceDefaultBtn);
??detectorLayout = (LinearLayout) findViewById(R.id.detectorLayout);
??layoutParent = (LinearLayout) findViewById(R.id.layoutParent);
??mediaPlayer = new MediaPlayer();
??audioManager = (AudioManager) getSystemService(Service.AUDIO_SERVICE);
??songList();
??getSongCount();
?}
?@Override
?protected void onCreate(Bundle savedInstanceState) {
??super.onCreate(savedInstanceState);
??setContentView(R.layout.activity_main);
??init();
??detector = new GestureDetector(this, new LearnGestureDetector());
??songNamText.setText("当前无播放歌曲");
??detectorLayout.setOnTouchListener(this);
??voicMaxBtn.setOnClickListener(new ImaBtnClickListener());
??voiceMinBtn.setOnClickListener(new ImaBtnClickListener());
??voiceDefaultBtn.setOnClickListener(new ImaBtnClickListener());
??pathBtn.setOnClickListener(new ImaBtnClickListener());
?}
?@Override
?public boolean onCreateOptionsMenu(Menu menu) {
??// Inflate the menu; this adds items to the action bar if it is present.
??getMenuInflater().inflate(R.menu.main, menu);
??return true;
?}
???
?class LearnGestureDetector extends GestureDetector.SimpleOnGestureListener {
??@Override
??public boolean onDoubleTap(MotionEvent e) {
???// TODO Auto-generated method stub
???Log.e("---", "onDoubleTap");
???return true;
??}
??@Override
??public boolean onDoubleTapEvent(MotionEvent e) {
???// TODO Auto-generated method stub
???Log.e("onDoubleTap+pause()", "---------");
???pauseMeida();
???return true;
??}
??@Override
??public boolean onDown(MotionEvent e) {
???// TODO Auto-generated method stub
???return true;
??}
??@Override
??public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
????float velocityY) {
???// TODO Auto-generated method stub
???// 向左滑动判断
???????????? Log.e("onFling()", "--------");
???if ((e1.getX() - e2.getX()) > 15
?????&& ((e1.getX() - e2.getX()) > Math.abs(e1.getY()
???????- e2.getY()))) {
????nextSong();
???} else if (e2.getX() - e1.getX() > 15
?????&& ((e2.getX() - e1.getX()) > Math.abs(e1.getY()
???????- e2.getY()))) {
????lastSong();
???} else if ((e1.getY() - e2.getY()) > 15
?????&& ((e1.getY() - e2.getY()) > Math.abs(e1.getX()
???????- e2.getX()))) {
????voiceManagerMax();
???} else if ((e2.getY() - e1.getY()) > 15
?????&& ((e2.getY() - e1.getY()) > Math.abs(e1.getX()
???????- e2.getX()))) {
????voiceManagerMin();
???}
???return true;
??}
??@Override
??public void onLongPress(MotionEvent e) {
???// TODO Auto-generated method stub
???super.onLongPress(e);
??}
??@Override
??public boolean onScroll(MotionEvent e1, MotionEvent e2,
????float distanceX, float distanceY) {
???// TODO Auto-generated method stub
???return true;
??}
??@Override
??public void onShowPress(MotionEvent e) {
???// TODO Auto-generated method stub
???super.onShowPress(e);
??}
??@Override
??public boolean onSingleTapConfirmed(MotionEvent e) {
???// TODO Auto-generated method stub
???Log.e("onSingleTapConfirmed+play()", "---------");
???if(isPaused==false||isStopped==true){
???prepareMedia(MainActivity.this.songpath);
???}
???else{
????playMedia();
???}
???return true;
??}
??@Override
??public boolean onSingleTapUp(MotionEvent e) {
???// TODO Auto-generated method stub
???return true;
??}
?}
?@Override
?public boolean onTouch(View v, MotionEvent event) {
??// TODO Auto-generated method stub
??if (songList.size() > 0) {
???return detector.onTouchEvent(event);
??}
??return false;
?}
?// 选择播放类型
?class SongFilter implements FilenameFilter {
??@Override
??public boolean accept(File arg0, String arg1) {
???// TODO Auto-generated method stub
???if (arg1.endsWith(".wmv")) {
????return true;
???} else if (arg1.endsWith(".mp3")) {
????return true;
???}
???return false;
??}
?}
?// 获得歌曲列表
?public void songList() {
??File rootPath = new File(getPath());
??Log.e("PATH-----", rootPath.getPath());
??// 如果存在.mp3 wmv歌曲
??if (rootPath.listFiles(new SongFilter()).length > 0) {
???for (File file : rootPath.listFiles(new SongFilter())) {
????MainActivity.this.songList.add(file.getName());
???}
???addBtnListener();
??} else {
???Toast.makeText(this, "未找到歌曲", 2000).show();
???removeBtnListener();
??}
?}
??? //增加按钮监听
?private void addBtnListener(){
??stopBtn.setOnClickListener(new ImaBtnClickListener());
??cycleBtn.setOnClickListener(new ImaBtnClickListener());
??randomBtn.setOnClickListener(new ImaBtnClickListener());
??playBtn.setOnClickListener(new ImaBtnClickListener());
??pauseBtn.setOnClickListener(new ImaBtnClickListener());
??nextSongBtn.setOnClickListener(new ImaBtnClickListener());
??lastSongBtn.setOnClickListener(new ImaBtnClickListener());
?}
?
?//移除按钮监听
?private void removeBtnListener(){
??stopBtn.setOnClickListener(null);
??cycleBtn.setOnClickListener(null);
??randomBtn.setOnClickListener(null);
??playBtn.setOnClickListener(null);
??pauseBtn.setOnClickListener(null);
??nextSongBtn.setOnClickListener(null);
??lastSongBtn.setOnClickListener(null);
?}
?class ImaBtnClickListener implements OnClickListener {
??@Override
??public void onClick(View v) {
???// TODO Auto-generated method stub
???switch (v.getId()) {
???case R.id.playBtn:
????Log.e("playListener", "--------------");
????// 如果记录存在，则当前歌曲为上一次已完成歌曲的下一首
????if(isPaused==false||isStopped==true){
????prepareMedia(songpath);
????}else{
?????playMedia();
????}
????break;
???case R.id.pauseBtn:
????Log.e("pauseListener", "-------");
????pauseMeida();
????break;
???case R.id.nextSongBtn:
????Log.e("nextSongListener", "--------------");
????nextSong();
????break;
???case R.id.lastSongBtn:
????Log.e("lastSongListener", "--------------");
????lastSong();
????break;
???case R.id.voicMaxBtn:
????voiceManagerMax();
????break;
???case R.id.voiceMinBtn:
????voiceManagerMin();
????break;
???case R.id.voiceDefaultBtn:
????voiceManagerDefault();
????break;
???case R.id.stopBtn:
????stopPlayer();
????break;
???case R.id.cycleBtn:
????recyleCurrentSong();
????break;
???case R.id.randomBtn:
????randomPlay();
????break;
???case R.id.pathBtn:
????// getRootPath();
????createDialog();
???}
??}
?}
?// 暂停
?private void pauseMeida() {
??Log.e("In pauseMedia()", "-----");
??isPaused=true;
??if (mediaPlayer.isPlaying()) {
???mediaPlayer.pause();
???songNamText.setText(songList.get(currentSong) + "---暂停中");
??}
?}
?
?//播放器准备
?private void prepareMedia(String songPath){
??Log.e("SONGPATH", songPath);
??isStopped=false;
??if (MainActivity.this.currentSong >= songList.size()) {
???MainActivity.this.currentSong = 0;
??}
??mediaPlayer.reset();?
???try {
????File songFile=new File(songPath);
????FileInputStream fis=new FileInputStream(songFile);
????mediaPlayer.setDataSource(fis.getFD());
????mediaPlayer.prepare();
???}catch(Exception e){
????e.printStackTrace();
???}
???playMedia();
?}
?// 播放
?private void playMedia() {
??if (!mediaPlayer.isPlaying()) {
???if (MainActivity.this.currentSong >=songList.size()) {
????MainActivity.this.currentSong = 0;
???}
?????
????mediaPlayer.start();
????isPaused=false;
????Log.e("In playMedia()", "-----");
????mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
?????@Override
?????public void onCompletion(MediaPlayer mp) {
??????// TODO Auto-generated method stub
??????if (MainActivity.this.id == 1) {// 单曲循环
???????prepareMedia(MainActivity.this.songpath);
???????strogeMusicSP(currentSong);
??????} else if (MainActivity.this.id == -1) {// 顺序播放（默认模式）
???????nextSong();
???????strogeMusicSP(currentSong);
??????} else if (MainActivity.this.id == 0) {// 随机播放
???????currentSong = (int) (songList.size() * Math
?????????.random()) + 1;
???????MainActivity.this.songpath = songRootPath
?????????+"/"+ songList.get(currentSong);
???????prepareMedia(MainActivity.this.songpath);
???????strogeMusicSP(currentSong);
??????}
?????}
????});
????if(mediaPlayer.isPlaying()){
?????Log.e("IsPlaying()", "-----------");
????}
???if (MainActivity.this.id == 1) {
????songNamText.setText(songList.get(currentSong)
??????+ "---播放中--单曲循环模式");
???} else if (MainActivity.this.id == 0) {
????songNamText.setText(songList.get(currentSong)
??????+ "---播放中--随机播放模式");
???} else {
????songNamText.setText(songList.get(currentSong) + "---播放中--顺序播放模式");
???}
??}
?}
?// 下一首
?private void nextSong() {
??Log.e("In nextSong()", "------");
??if (MainActivity.this.currentSong >= (songList.size() - 1)) {
???MainActivity.this.currentSong = 0;
??} else {
???MainActivity.this.currentSong++;
??}
??MainActivity.this.songpath = songRootPath + "/"+songList.get(currentSong);
??if (mediaPlayer.isPlaying()) {
???prepareMedia(MainActivity.this.songpath);
??}else if(isStopped==true){
???songNamText.setText(songList.get(currentSong) + "---停止中");
??}else{
???songNamText.setText(songList.get(currentSong) + "---暂停中");
??}
?}
?// 停止
?private void stopPlayer() {
??mediaPlayer.stop();
??isStopped=true;
??songNamText.setText(songList.get(currentSong) + "---停止中");
?}
?// 上一首
?private void lastSong() {
??Log.e("In LastSong()", "------");
??if ((MainActivity.this.currentSong - 1) < 0) {
???MainActivity.this.currentSong = songList.size() - 1;
??} else {
???MainActivity.this.currentSong--;
??}
??MainActivity.this.songpath = songRootPath + "/"+songList.get(currentSong);
??if (mediaPlayer.isPlaying()) {
???
???prepareMedia(MainActivity.this.songpath);
??} else if(isStopped==true){
???songNamText.setText(songList.get(currentSong) + "---停止中");
??}else{
???songNamText.setText(songList.get(currentSong) + "---暂停中");
??}
?}
?// 一次单曲循环，一次单击取消转顺序
?private void recyleCurrentSong() {
??Log.e("In recyleCurrentSong()", "------");
??if (MainActivity.this.id != 1) {
???MainActivity.this.id = 1;
???MainActivity.this.songpath = songRootPath
?????+ "/"+songList.get(currentSong);
???songNamText.setText(songList.get(currentSong) + "---播放中--单曲循环模式");
??} else {
???MainActivity.this.id = -1;
???getSongCount();
???songNamText.setText(songList.get(currentSong) + "---播放中");
??}
?}
?// 一次随机播放,一次单击取消转顺序
?private void randomPlay() {
??Log.e("In randomPlay()", "------");
??if (MainActivity.this.id != 0) {
???MainActivity.this.id = 0;
???songNamText.setText(songList.get(currentSong) + "---播放中--随机播放模式");
??} else {
???MainActivity.this.id = -1;
???getSongCount();
???songNamText.setText(songList.get(currentSong) + "---播放中");
??}
?}
?// 降低音量
?private void voiceManagerMin() {
??MainActivity.this.audioManager.adjustStreamVolume(
????AudioManager.STREAM_MUSIC, AudioManager.ADJUST_LOWER,
????AudioManager.FLAG_SHOW_UI);
?}
?// 提高音量
?private void voiceManagerMax() {
??MainActivity.this.audioManager.adjustStreamVolume(
????AudioManager.STREAM_MUSIC, AudioManager.ADJUST_RAISE,
????AudioManager.FLAG_SHOW_UI);
?}
?// 静音
?private void voiceManagerDefault() {
??MainActivity.this.audioManager.setStreamVolume(
????AudioManager.STREAM_MUSIC, 0, AudioManager.FLAG_SHOW_UI);
?}
?// 存储播放器歌曲记录
?private void strogeMusicSP(int currentSong) {
??Context ctx = MainActivity.this;
??SharedPreferences sp = ctx.getSharedPreferences("SP", MODE_PRIVATE);
??Editor editor = sp.edit();
??editor.putInt("SimpleMedia_int_currentSong", currentSong);
??editor.commit();
?}
?// 存储播放器路径记录
?private void strogePathSP(String songRootPath) {
??Context ctx = MainActivity.this;
??SharedPreferences sp = ctx.getSharedPreferences("SP", MODE_PRIVATE);
??Editor editor = sp.edit();
??editor.putString("SimpleMedia_string_currentPath", songRootPath);
??editor.commit();
?}
?// 获取播放器记录中上次歌曲位置
?private void getSongCount() {
??Context ctx = MainActivity.this;
??SharedPreferences sp = ctx.getSharedPreferences("SP", MODE_PRIVATE);
??songCount = sp.getInt("SimpleMedia_int_currentSong", -1);
??if (songCount != -1) {
???MainActivity.this.currentSong = songCount;
??}
??if ((songList.size() > 0) ) {
???// 获取播放歌曲的路径
???if(MainActivity.this.currentSong>=songList.size()){
????MainActivity.this.currentSong=0;
???}
???MainActivity.this.songpath = MainActivity.this.songRootPath +"/"+songList.get(currentSong);
??}
?}
?// 获取播放器记录中上次播放的路径
?private String getPath() {
??Context ctx = MainActivity.this;
??SharedPreferences sp = ctx.getSharedPreferences("SP", MODE_PRIVATE);
??path = sp.getString("SimpleMedia_string_currentPath", null);
??if (path != null) {
???Log.e("in getPath()",path);
???MainActivity.this.songRootPath = path;
???return MainActivity.this.songRootPath;
??} else {
???MainActivity.this.songRootPath="/mnt/sdcard/";
???return songRootPath;
??}
?}
?// 播放器路径选择
?private void getRootPath() {
??Log.e("LISTVIEW", "----");
??File root = new File(rootPath);
??if (root.exists()) {
???currentParent = root;
???currentFiles = root.listFiles();// 获取根目录下所有文件
???createListView(currentFiles);
??}
??showPathList.setOnItemClickListener(new OnItemClickListener() {
???@Override
???public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
?????long arg3) {
????// TODO Auto-generated method stub
????if (arg2 == 0) {
?????try {
??????if (currentParent.getParentFile().getPath().equals(
????????"/mnt")){
???????
??????}else {
???????currentParent = currentParent.getParentFile();
???????currentFiles = currentParent.listFiles();
???????MainActivity.this.currentRootPath = currentFiles[arg2].getParentFile().getPath();
???????createListView(currentFiles);
??????}
?????} catch (Exception e) {
??????// TODO Auto-generated catch block
??????e.printStackTrace();
?????}
????} else {
?????File[] childFiles = currentFiles[arg2 - 1].listFiles();
?????MainActivity.this.currentRootPath = currentFiles[arg2 - 1].getPath();
?????if (childFiles != null && childFiles.length > 0) {
??????currentParent = currentFiles[arg2 - 1];
??????currentFiles = childFiles;
??????MainActivity.this.createListView(currentFiles);
?????} else {
??????Toast.makeText(getApplicationContext(), "文件为空或不可访问",
????????2000);
?????}
????}
???}
??});
?}
?// listview显示目录
?private void createListView(File[] currentFiles) {
??List<String> fileNameList = new ArrayList<String>();
??showPathText.setText(currentRootPath);
??fileNameList.add("返回上一级");
??for (int i = 0; i < currentFiles.length; i++) {
???fileNameList.add(currentFiles[i].getName());
??}
??showPathList.setAdapter(new ArrayAdapter<String>(MainActivity.this,
????android.R.layout.simple_expandable_list_item_1, fileNameList));
??//setContentView(showPathList);
?}
? //创建dialog
?private void createDialog() {
??Builder builder=new AlertDialog.Builder(this);
??LinearLayout pathLayout=(LinearLayout) getLayoutInflater().inflate(R.layout.path_select, null);
??showPathList = (ListView) pathLayout.findViewById(R.id.showPathList);
??showPathText = (TextView) pathLayout.findViewById(R.id.showPathText);
??getRootPath();//获取路径
??
??builder.setView(pathLayout);
??builder.setPositiveButton("确认路径",
????new DialogInterface.OnClickListener() {
?????@Override
?????public void onClick(DialogInterface dialog, int which) {
??????// TODO Auto-generated method stub
??????Log.e("CurrentRootPath", MainActivity.this.currentRootPath);
??????strogePathSP(MainActivity.this.currentRootPath);
??????songList();
??????Log.e("CreateDialog-songList()", "---------------");
??????getSongCount();
?????}
????});
??builder.setNegativeButton("取消选择",
????new DialogInterface.OnClickListener() {
???
?????@Override
?????public void onClick(DialogInterface dialog, int which) {
??????// TODO Auto-generated method stub
??????currentRootPath="/mnt/sdcard/";
?????}
????});
??????? builder.create().show();
?}
? //长按返回键退出
?@Override
?public boolean onKeyLongPress(int keyCode, KeyEvent event) {
??// TODO Auto-generated method stub
??if(keyCode==KeyEvent.KEYCODE_BACK){
???System.exit(0);
??}
??return super.onKeyLongPress(keyCode, event);
?}
???
?????
}
