使用的是MediaPlayer这个对象，实现的方法：
- 扫描Music的目录，把文件add到array中。
- 然后实用化MediaPlayer对象。
- 接着实现start、stop、pause、next等播放方法。
播放的方法：
uri = Uri.parse("/mnt/sdcard/Music/1.MP3");
try {
mp.setDataSource(mContext, uri);
mp.prepare();
} catch (IOException e) {
e.printStackTrace();
}
mp.start();
暂停的方法：
mp.pause();
停止的方法：
mp.stop();
下一首的方法：
mp.reset();
uri = Uri.parse("/mnt/sdcard/Music/2.MP3");
try {
mp.setDataSource(mContext, uri);
mp.prepare();
} catch (IOException e) {
e.printStackTrace();
}
mp.start();
以下是整个文件的代码：
package com.test.testmedia;
import android.annotation.TargetApi;
import android.content.Context;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Timer;
import java.util.TimerTask;
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MediaLog";
Button start,stop,pause,start2,stop2,pause2;
MediaPlayer mp;
Uri uri;
Context mContext;
Timer timer;
TimerTask tt;
HandlerEx handler;
Bundle bundle;
int audiolenth = -1;
int MediaPlayerstate = -1;
private ArrayList<String> music = new ArrayList<String>();
int pos = -1;
public class HandlerEx extends Handler{
public void handleMessage(Message msg) {
if(msg.what == 1){
if(bundle.containsKey("title")){
Log.i(TAG,bundle.getString("title"));
setTitle(bundle.getString("title"));
}
}
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
findid();
init();
}
private void findid() {
start = (Button)findViewById(R.id.Start);
stop = (Button)findViewById(R.id.Stop);
pause = (Button)findViewById(R.id.Pause);
start2 = (Button)findViewById(R.id.start2);
stop2 = (Button)findViewById(R.id.stop2);
pause2 = (Button)findViewById(R.id.pause2);
mContext = this;
mp = new MediaPlayer();
bundle = new Bundle();
timer = new Timer();
tt = new TimerTask() {
@Override
public void run() {
Message msg = handler.obtainMessage();
msg.what=1;
switch (MediaPlayerstate){
case 1:
bundle.putString("title","正在播放:" + (int) (mp.getCurrentPosition() / 1000) + "/" + audiolenth);
break;
case 2:
bundle.putString("title","已停止");
break;
case 3:
bundle.putString("title","已暂停");
break;
default:
bundle.putString("title",getString(R.string.app_name));
break;
}
handler.sendMessage(msg);
}
};
timer.schedule(tt,0,1000);
handler = new HandlerEx();
getFils("/mnt/sdcard/Music/", ".mp3", true);
}
/**
* 搜索文件
* @param path 如:/mnt/sdcard/Music/
* @param suffix 单个请使用.mp3,多个如:.mp3;.log
* @param isSon 是否包含子目录
*/
private void getFils(String path,String suffix,boolean isSon){
File[] files = new File(path).listFiles();
for (int i = 0; i < files.length; i++){
File f = files[i];
if(f.isFile()){
String _name = f.getPath();
String _suf = _name.substring(_name.lastIndexOf(".")).toLowerCase();
suffix = suffix.toLowerCase();
if(suffix.indexOf(_suf) != -1 ){
Log.i(TAG,_name);
music.add(_name);
}
if(!isSon)
break;
}else if (f.isDirectory() && f.getPath().indexOf("/.") == -1){
getFils(f.getPath(),suffix,isSon);
}
}
}
private String getMp3(){
pos++;
if(pos >= music.size())
pos = -1;
return music.get(pos);
}
private void init() {
start.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (start.getText().equals(getString(R.string.start))) {
start.setText(getString(R.string.next));
} else {
mp.reset();
}
String u = getMp3();
Log.i(TAG, u);
uri = Uri.parse(u);
try {
mp.setDataSource(mContext, uri);
mp.prepare();
} catch (IOException e) {
e.printStackTrace();
}
mp.start();
audiolenth = (int) mp.getDuration() / 1000;
MediaPlayerstate = 1;
}
});
stop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mp.stop();
mp.reset();
MediaPlayerstate = 2;
}
});
pause.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (pause.getText().equals(getString(R.string.pause))) {
MediaPlayerstate = 3;
mp.pause();
pause.setText(getString(R.string.play));
} else {
MediaPlayerstate = 1;
mp.start();
pause.setText(getString(R.string.pause));
}
}
});
mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
Log.i(TAG, "setOnCompletionListener");
mp.reset();
MediaPlayerstate = -1;
start.callOnClick();
}
});
mp.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mp) {
Log.i(TAG, "setOnPreparedListener:" + mp.getDuration());
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
