我正在制作媒体播放器应用。我正在尝试将其同步到搜索栏，以便在播放媒体时搜索栏自动进行。这是我的源代码：
public class MusicDroid extends ListActivity implements
SeekBar.OnSeekBarChangeListener, Runnable {
private int cur_time = 0;
private SeekBar seekbar;
int song_dur = 0;
GroveService gs;
public Chronometer timer;
int timer_time = 0;
@Override
public void onCreate(Bundle icicle) {
try {
super.onCreate(icicle);
setContentView(R.layout.songlist);
gs = new GroveService();
gs.updateSongList();
} catch (NullPointerException e) {
Log.v(getString(R.string.app_name), e.getMessage());
}
seekbar = (SeekBar) findViewById(R.id.SeekBar01);
timer = (Chronometer) findViewById(R.id.Chronometer01);
seekbar.setOnSeekBarChangeListener(this);
// this.bindService(new Intent(this, GroveService.class), conn,
// Context.BIND_AUTO_CREATE);
ArrayAdapter<String> songList = new ArrayAdapter<String>(this,
R.layout.song_item, gs.songs);
setListAdapter(songList);
timer.setOnChronometerTickListener(new OnChronometerTickListener() {
@Override
public void onChronometerTick(Chronometer arg0) {
// TODO Auto-generated method stub
seekbar.setProgress(cur_time);
}
});
}
protected void onListItemClick(ListView l, View v, int position, long id) {
timer.stop();
timer.start();
gs.playSong(position, 0);
}
/*
* private ServiceConnection conn= new ServiceConnection(){
*
* @Override public void onServiceConnected(ComponentName arg0, IBinder
* arg1) { Log.v("Status:","Service Connected to player"); // TODO
* Auto-generated method stub tprog= new Thread(new Runnable(){
*
* }); tprog.setPriority(Thread.MIN_PRIORITY); tprog.start(); }
*
* @Override public void onServiceDisconnected(ComponentName arg0) { // TODO
* Auto-generated method stub
*
* } };
*/
// code for menu based media player controls
/*
* public boolean onOptionsItemSelected(MenuItem item) { switch
* (item.getItemId()) { case R.id.prev: gs.prevSong(); break; case
* R.id.play: gs.playSong(gs.songindex,cur_time); break; case R.id.pause:
* gs.mp.getDuration(); gs.mp.pause(); break; case R.id.nxt: gs.nextSong();
* break; } return true; }
*/
public void myClickHandler(View view) {
switch (view.getId()) {
case R.id.ImageButton01:
gs.prevSong();
timer.stop();
seekbar.setMax(gs.getSongDuration(gs.songindex));
Log.v("SeekBar Max", String.valueOf(seekbar.getMax()));
timer.start();
break;
case R.id.ImageButton02:
Thread t=new Thread();
t.start();
gs.playSong(gs.songindex, cur_time);
timer.start();
seekbar.setMax(gs.getSongDuration(gs.songindex));
Log.v("SeekBar Max", String.valueOf(seekbar.getMax()));
break;
case R.id.ImageButton03:
cur_time = gs.getCurrentDuration(gs.songindex);
if(gs.mp.isPlaying()){
timer_time=Integer.parseInt((String)timer.getText());
timer.stop();
timer.setBase(timer_time);
Log.v("Timer Time",String.valueOf(timer_time)); }
gs.mp.pause();
seekbar.setMax(gs.getSongDuration(gs.songindex));
Log.v("SeekBar Max", String.valueOf(seekbar.getMax()));
break;
case R.id.ImageButton04:
gs.nextSong();
timer.stop();
timer.start();
seekbar.setMax(gs.getSongDuration(gs.songindex));
Log.v("SeekBar Max", String.valueOf(seekbar.getMax()));
break;
}
}
@Override
public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) {
// TODO Auto-generated method stub
gs.mp.seekTo(arg1);
}
@Override
public void onStartTrackingTouch(SeekBar arg0) {
// TODO Auto-generated method stub
}
@Override
public void onStopTrackingTouch(SeekBar arg0) {
// TODO Auto-generated method stub
}
@Override
public void run() {
// TODO Auto-generated method stub
int currentPosition = 0;
int total = gs.mp.getDuration();
seekbar.setMax(total);
while (gs.mp != null && currentPosition < total) {
try {
Thread.sleep(1000);
currentPosition = gs.mp.getCurrentPosition();
} catch (InterruptedException e) {
return;
} catch (Exception e) {
return;
}
seekbar.setProgress(currentPosition);
}
}
}
执行音乐播放的服务类。代码在这里：
class Mp3Filter implements FilenameFilter {
public boolean accept(File dir, String name) {
return (name.endsWith(".mp3"));
}
}
public class GroveService extends Service {
static final String MEDIA_PATH = new String("/sdcard/");
List<String> songs = new ArrayList<String>();
MediaPlayer mp = new MediaPlayer();
int songindex = 0;
int duration=0;
//MusicDroid md;
@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
public void onCreate()
{
super.onCreate();
updateSongList();
//md=new MusicDroid();
}
public void updateSongList() {
File home = new File(MEDIA_PATH);
if (home.listFiles(new Mp3Filter()).length > 0) {
for (File file : home.listFiles(new Mp3Filter())) {
songs.add(file.getName());
}
}
}
public void playSong(final int position, final int cur_pos) {
try {
mp.reset();
mp.setDataSource(MEDIA_PATH + songs.get(position));
mp.prepare();
//song_dur=mp.getDuration();
mp.seekTo(cur_pos);
mp.start();
duration=position;
mp.setOnCompletionListener(new OnCompletionListener() {
public void onCompletion(MediaPlayer arg0) {
nextSong();
}
});
} catch (IOException e) {
Log.v(getString(R.string.app_name), e.getMessage());
}
}
public void nextSong() {
if (++songindex >= songs.size())
songindex = 0;
else
playSong(songindex,0);
}
public void prevSong() {
songindex--;
if (songindex > 0)
playSong(songindex,0);
else {
songindex = 0;
playSong(songindex,0);
}
}
public int getSongDuration(int index)
{
duration=mp.getDuration();
Log.v("Song Duration", String.valueOf(duration));
return duration;
}
public int getCurrentDuration(int index){
int current_position;
current_position=mp.getCurrentPosition();
Log.v("Current Dur:",String.valueOf(current_position));
return current_position;
}
}
答案 0 :(得分：7)
尝试此代码，此代码在我的系统中正常运行。
package san.san;
import android.app.Activity;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Handler;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.widget.Button;
import android.widget.SeekBar;
public class Mp3player extends Activity {
private Button buttonPlayStop;
private MediaPlayer mediaPlayer;
private SeekBar seekBar;
private final Handler handler = new Handler();
// Here i override onCreate method.
//
// setContentView() method set the layout that you will see then
// the application will starts
//
// initViews() method i create to init views components.
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
initViews();
}
// This method set the setOnClickListener and method for it (buttonClick())
private void initViews() {
buttonPlayStop = (Button) findViewById(R.id.ButtonPlayStop);
buttonPlayStop.setOnClickListener(new OnClickListener() {public void onClick(View v) {buttonClick();}});
mediaPlayer = MediaPlayer.create(this, R.raw.sound41772);
seekBar = (SeekBar) findViewById(R.id.SeekBar01);
seekBar.setMax(mediaPlayer.getDuration());
seekBar.setOnTouchListener(new OnTouchListener() {public boolean onTouch(View v, MotionEvent event) {
seekChange(v);
return false; }
});
}
public void startPlayProgressUpdater() {
seekBar.setProgress(mediaPlayer.getCurrentPosition());
if (mediaPlayer.isPlaying()) {
Runnable notification = new Runnable() {
public void run() {
startPlayProgressUpdater();
}
};
handler.postDelayed(notification,1000);
}else{
mediaPlayer.pause();
buttonPlayStop.setText(getString(R.string.play_str));
seekBar.setProgress(0);
}
}
// This is event handler thumb moving event
private void seekChange(View v){
if(mediaPlayer.isPlaying()){
SeekBar sb = (SeekBar)v;
mediaPlayer.seekTo(sb.getProgress());
}
}
// This is event handler for buttonClick event
private void buttonClick(){
if (buttonPlayStop.getText() == getString(R.string.play_str)) {
buttonPlayStop.setText(getString(R.string.pause_str));
try{
mediaPlayer.start();
startPlayProgressUpdater();
}catch (IllegalStateException e) {
mediaPlayer.pause();
}
}else {
buttonPlayStop.setText(getString(R.string.play_str));
mediaPlayer.pause();
}
}
}
这是我的main.xml：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:id="@+id/widget31"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android">
<Button
android:text="@string/play_str"
android:textSize="15pt"
android:textStyle="bold"
android:id="@+id/ButtonPlayStop"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
<SeekBar
android:id="@+id/SeekBar01"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:layout_below="@id/ButtonPlayStop"/>
</RelativeLayout>
这是我的string.xml：
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">Android mp3 player</string>
<string name="play_str">PLAY</string>
<string name="pause_str">PAUSE</string>
</resources>
这是我的清单文件
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="san.san"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="8" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".Mp3player"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
答案 1 :(得分：6)
在MediaPlayer中，您可以设置onPreparedListener，您可以在其中同步搜索，如下所示
mMediaPlayer.setOnPreparedListener(new OnPreparedListener()
{
@Override
public void onPrepared(final MediaPlayer mp)
{
seekBar.setMax(mp.getDuration());
new Thread(new Runnable() {
@Override
public void run() {
while(mp!=null && mp.getCurrentPosition()<mp.getDuration())
{
seekBar.setProgress(mp.getCurrentPosition());
Message msg=new Message();
int millis = mp.getCurrentPosition();
msg.obj=millis/1000;
mHandler.sendMessage(msg);
try {
Thread.sleep(100);
}
catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}).start();
}
});
答案 2 :(得分：0)
您需要在onProgressChanged（）方法中更改一点代码。
试试这段代码：
public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) {
// TODO Auto-generated method stub
if(arg2){
gs.mp.seekTo(arg1);
}
}
您还可以查看我的下面的代码。这段代码在我的计算机和模拟器中运行良好。
我的Java代码：
public class MainActivity extends AppCompatActivity {
MediaPlayer player;
//Handler seekHandler = new Handler();
AudioManager audioManager;
SeekBar musicseek;
public void play(View view)
{
player.start();
}
public void pause(View view)
{
player.pause();
}
public void stop(View view)
{
player.stop();
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
player=MediaPlayer.create(this,R.raw.music);
audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
int maxvol= audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
int curvol= audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
SeekBar bar=(SeekBar) findViewById(R.id.seekBar);
bar.setMax(maxvol);
bar.setProgress(curvol);
musicseek= (SeekBar) findViewById(R.id.musicSeek);
musicseek.setMax(player.getDuration());
musicseek.setProgress(player.getCurrentPosition());
final Handler han = new Handler();
Runnable myRunnable = new Runnable() {
@Override
public void run() {
musicseek.setProgress(player.getCurrentPosition());
han.postDelayed(this, 1000);
}
};
myRunnable.run();
musicseek.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener(){
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
if(fromUser){
player.seekTo(progress);
}
}
});
bar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener(){
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
//String temp=Integer.toString(progress);
//Log.i("seekbar ",temp);
audioManager.setStreamVolume(AudioManager.STREAM_MUSIC,progress,0);
}
});
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}
@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);
}
}
我的Xml代码可以在以下链接中找到：https://pastebin.com/a2Sdr0bB
我希望这有帮助！