android Mediaplayer用法
阿新 • • 發佈：2018-12-30
package com.terry;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import android.app.ListActivity;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
publicclass musicActivity extends ListActivity {
//播放物件private MediaPlayer myMediaPlayer;
//播放列表private List<String> myMusicList=new ArrayList<String>();
//當前播放歌曲的索引
//音樂的路徑privatestaticfinal String MUSIC_PATH=new String("/sdcard/");
/** Called when the activity is first created. */
@Override
publicvoid onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
myMediaPlayer
findView();
musicList();
listener();
}
//繫結音樂void musicList(){
File home=new File(MUSIC_PATH);
if(home.listFiles(new MusicFilter()).length>0){
for(File file:home.listFiles(new MusicFilter())){
myMusicList.add(file.getName());
}
ArrayAdapter<String> musicList=new ArrayAdapter<String>
(musicActivity.this,R.layout.musicitme, myMusicList);
setListAdapter(musicList);
}
}
//獲取按鈕void findView(){
viewHolder.start=(Button)findViewById(R.id.start);
viewHolder.stop=(Button)findViewById(R.id.stop);
viewHolder.next=(Button)findViewById(R.id.next);
viewHolder.pause=(Button)findViewById(R.id.pause);
viewHolder.last=(Button)findViewById(R.id.last);
}
//監聽事件void listener(){
//停止 viewHolder.stop.setOnClickListener(new OnClickListener() {
@Override
publicvoid onClick(View v) {
// TODO Auto-generated method stubif(myMediaPlayer.isPlaying()){
myMediaPlayer.reset();
}
}
});
//開始 viewHolder.start.setOnClickListener(new OnClickListener() {
@Override
publicvoid onClick(View v) {
// TODO Auto-generated method stub playMusic(MUSIC_PATH+myMusicList.get(currentListItem));
}
});
//下一首 viewHolder.next.setOnClickListener(new OnClickListener() {
@Override
publicvoid onClick(View v) {
// TODO Auto-generated method stub nextMusic();
}
});
//暫停 viewHolder.pause.setOnClickListener(new OnClickListener() {
@Override
publicvoid onClick(View v) {
// TODO Auto-generated method stubif(myMediaPlayer.isPlaying()){
myMediaPlayer.pause();
}else{
myMediaPlayer.start();
}
}
});
//上一首 viewHolder.last.setOnClickListener(new OnClickListener() {
@Override
publicvoid onClick(View v) {
// TODO Auto-generated method stub
lastMusic();
}
});
}
//播放音樂 void playMusic(String path){
try {
myMediaPlayer.reset();
myMediaPlayer.setDataSource(path);
myMediaPlayer.prepare();
myMediaPlayer.start();
myMediaPlayer.setOnCompletionListener(new OnCompletionListener() {
@Override
publicvoid onCompletion(MediaPlayer mp) {
// TODO Auto-generated method stub nextMusic();
}
});
} catch (Exception e) {
// TODO: handle exception e.printStackTrace();
}
}
//下一首void nextMusic(){
if(++currentListItem>=myMusicList.size()){
currentListItem=0;
}
else{
playMusic(MUSIC_PATH+myMusicList.get(currentListItem));
}
}
//上一首void lastMusic(){
if(currentListItem!=0)
{
if(--currentListItem>=0){
currentListItem=myMusicList.size();
} else{
playMusic(MUSIC_PATH+myMusicList.get(currentListItem));
}
} else{
playMusic(MUSIC_PATH+myMusicList.get(currentListItem));
}
}
//當用戶返回時結束音樂並釋放音樂物件 @Override
publicboolean onKeyDown(int keyCode, KeyEvent event) {
// TODO Auto-generated method stubif(keyCode==KeyEvent.KEYCODE_BACK){
myMediaPlayer.stop();
myMediaPlayer.release();
this.finish();
returntrue;
}
returnsuper.onKeyDown(keyCode, event);
}
//當選擇列表項時播放音樂 @Override
protectedvoid onListItemClick(ListView l, View v, int position, long id) {
// TODO Auto-generated method stub currentListItem=position;
playMusic(MUSIC_PATH+myMusicList.get(currentListItem));
}
}
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import android.app.ListActivity;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
publicclass musicActivity extends ListActivity {
//播放物件private MediaPlayer myMediaPlayer;
//播放列表private List<String> myMusicList=new ArrayList<String>();
//當前播放歌曲的索引
//音樂的路徑privatestaticfinal String MUSIC_PATH=new String("/sdcard/");
/** Called when the activity is first created. */
@Override
publicvoid onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
myMediaPlayer
findView();
musicList();
listener();
}
//繫結音樂void musicList(){
File home=new File(MUSIC_PATH);
if(home.listFiles(new MusicFilter()).length>0){
for(File file:home.listFiles(new MusicFilter())){
myMusicList.add(file.getName());
}
ArrayAdapter<String> musicList=new ArrayAdapter<String>
(musicActivity.this,R.layout.musicitme, myMusicList);
setListAdapter(musicList);
}
}
//獲取按鈕void findView(){
viewHolder.start=(Button)findViewById(R.id.start);
viewHolder.stop=(Button)findViewById(R.id.stop);
viewHolder.next=(Button)findViewById(R.id.next);
viewHolder.pause=(Button)findViewById(R.id.pause);
viewHolder.last=(Button)findViewById(R.id.last);
}
//監聽事件void listener(){
//停止 viewHolder.stop.setOnClickListener(new OnClickListener() {
@Override
publicvoid onClick(View v) {
// TODO Auto-generated method stubif(myMediaPlayer.isPlaying()){
myMediaPlayer.reset();
}
}
});
//開始 viewHolder.start.setOnClickListener(new OnClickListener() {
@Override
publicvoid onClick(View v) {
// TODO Auto-generated method stub playMusic(MUSIC_PATH+myMusicList.get(currentListItem));
}
});
//下一首 viewHolder.next.setOnClickListener(new OnClickListener() {
@Override
publicvoid onClick(View v) {
// TODO Auto-generated method stub nextMusic();
}
});
//暫停 viewHolder.pause.setOnClickListener(new OnClickListener() {
@Override
publicvoid onClick(View v) {
// TODO Auto-generated method stubif(myMediaPlayer.isPlaying()){
myMediaPlayer.pause();
}else{
myMediaPlayer.start();
}
}
});
//上一首 viewHolder.last.setOnClickListener(new OnClickListener() {
@Override
publicvoid onClick(View v) {
// TODO Auto-generated method stub
lastMusic();
}
});
}
//播放音樂 void playMusic(String path){
try {
myMediaPlayer.reset();
myMediaPlayer.setDataSource(path);
myMediaPlayer.prepare();
myMediaPlayer.start();
myMediaPlayer.setOnCompletionListener(new OnCompletionListener() {
@Override
publicvoid onCompletion(MediaPlayer mp) {
// TODO Auto-generated method stub nextMusic();
}
});
} catch (Exception e) {
// TODO: handle exception e.printStackTrace();
}
}
//下一首void nextMusic(){
if(++currentListItem>=myMusicList.size()){
currentListItem=0;
}
else{
playMusic(MUSIC_PATH+myMusicList.get(currentListItem));
}
}
//上一首void lastMusic(){
if(currentListItem!=0)
{
if(--currentListItem>=0){
currentListItem=myMusicList.size();
} else{
playMusic(MUSIC_PATH+myMusicList.get(currentListItem));
}
} else{
playMusic(MUSIC_PATH+myMusicList.get(currentListItem));
}
}
//當用戶返回時結束音樂並釋放音樂物件 @Override
publicboolean onKeyDown(int keyCode, KeyEvent event) {
// TODO Auto-generated method stubif(keyCode==KeyEvent.KEYCODE_BACK){
myMediaPlayer.stop();
myMediaPlayer.release();
this.finish();
returntrue;
}
returnsuper.onKeyDown(keyCode, event);
}
//當選擇列表項時播放音樂 @Override
protectedvoid onListItemClick(ListView l, View v, int position, long id) {
// TODO Auto-generated method stub currentListItem=position;
playMusic(MUSIC_PATH+myMusicList.get(currentListItem));
}
}