自制Android下的播放器（音频来源SD卡上的固定位置）
1、视图介绍：http://b45.photo.store.qq.com/http_imgload.cgi?/rurl4_b=28bed8ef94e3a6508c56ea9f7ef499ecaf5bc711b3b6df92d58cbdfecb75a931158c9af53a2d7f7e6f30cbe982c7f6315f4cb13db03b4e33829cf1b20a834ff0c563064a413d38e6acdf3c2860b266d54c4e64cc&a=52&b=45
2、代码：
package com.android.player;
import java.io.File;
import java.io.FilenameFilter;
import java.io.IOException;
import android.app.Activity;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.SystemClock;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;
public class Player extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
playerTitle_ = (TextView) findViewById(R.id.playertitle);
playerdurationText_ = (TextView) findViewById(R.id.playerdurationText);
playControlBtn_ = (ImageButton) findViewById(R.id.playcontrolBtn);
playControlBtn_.setOnClickListener(new playControlListener());
playControlBtn_.setImageResource(android.R.drawable.ic_media_play);
previousBtn_ = (ImageButton) findViewById(R.id.playpreviousfileBtn);
previousBtn_.setOnClickListener(new PreviousBtnOnClickListener());
previousBtn_.setEnabled(false);
nextBtn_ = (ImageButton) findViewById(R.id.playnextfileBtn);
nextBtn_.setOnClickListener(new NextBtnOnClickListener());
palyprogressBar_ = (ProgressBar) findViewById(R.id.playProgressBar);
palyprogressBar_.setMax(100);
palyprogressBar_.setProgress(0);
fileName_ = GetFiles(filePath_);
playerFileList_ = (ListView) findViewById(R.id.playerfileList);
playerFileList_.setAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, fileName_));
playerFileList_
.setOnItemClickListener(new FileListOnItemClickListener());
}
class playControlListener implements OnClickListener {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (playState_ == stop) {
Log.v("test", "player start!!");
currentfile_ = 0;
playerStart();
} else if (playState_ == pause) {
Log.v("test", "player Restart!!");
playerRestart();
} else if (playState_ == playing) {
Log.v("test", "player pause!!");
playerPause();
}
}
}
class PreviousBtnOnClickListener implements OnClickListener {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
currentfile_ -= 1;
playerStop();
playerStart();
}
}
class NextBtnOnClickListener implements OnClickListener {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
currentfile_ += 1;
playerStop();
playerStart();
}
}
class MyOnCompletionListener implements OnCompletionListener {
@Override
public void onCompletion(MediaPlayer arg0) {
// TODO Auto-generated method stub
currentfile_ += 1;
playerStop();
playerStart();
}
}
class FileListOnItemClickListener implements OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
currentfile_ = arg2;
playerStop();
playerStart();
}
}
class ProgressBarThread extends Thread {
public void run() {
myHandler.post(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
playerTitle_.setText(fileName_);
}
});
palyprogressBar_.setProgress(0);
palyprogressBar_.setMax(fileDuration_);
int current_ = 0;
while (playState_ != stop) {
palyprogressBar_.setProgress(current_);
current_ = mp_.getCurrentPosition() / 1000;
durationText_.delete(0, durationText_.length());
if ((current_ / 60) < 10) {
durationText_.append(0);
}
durationText_.append(current_ / 60);
durationText_.append(":");
if ((current_ % 60) < 10) {
durationText_.append(0);
}
durationText_.append(current_ % 60);
durationText_.append("/");
if ((fileDuration_ / 60) < 10) {
durationText_.append(0);
}
durationText_.append(fileDuration_ / 60);
durationText_.append(":");
if ((fileDuration_ % 60) < 10) {
durationText_.append(0);
}
durationText_.append(fileDuration_ % 60);
myHandler.post(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
playerdurationText_.setText(durationText_.toString());
}
});
SystemClock.sleep(100);
}
}
}
void playerRestart() {
playState_ = playing;
playControlBtn_.setImageResource(android.R.drawable.ic_media_pause);
if (mp_ != null) {
mp_.start();
}
}
void playerStart() {
if (currentfile_ == 0) {
previousBtn_.setEnabled(false);
} else {
previousBtn_.setEnabled(true);
}
if (currentfile_ == fileName_.length - 1) {
nextBtn_.setEnabled(false);
} else {
nextBtn_.setEnabled(true);
}
playState_ = playing;
playControlBtn_.setImageResource(android.R.drawable.ic_media_pause);
mp_ = new MediaPlayer();
mp_.setOnCompletionListener(new MyOnCompletionListener());
try {
mp_.setDataSource(filePath_ + fileName_);
mp_.prepare();
fileDuration_ = mp_.getDuration() / 1000;
mp_.start();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
new ProgressBarThread().start();
}
void playerPause() {
playState_ = pause;
playControlBtn_.setImageResource(android.R.drawable.ic_media_play);
if (mp_ != null) {
mp_.pause();
}
}
void playerStop() {
playState_ = stop;
playControlBtn_.setImageResource(android.R.drawable.ic_media_play);
if (mp_ != null) {
mp_.release();
mp_ = null;
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
if (keyCode == KeyEvent.KEYCODE_BACK) {
this.playerStop();
}
return super.onKeyDown(keyCode, event);
}
String[] GetFiles(String path) {
File dir = new File(path);
String[] filenames = dir.list(new FilenameFilter() {
@Override
public boolean accept(File arg0, String arg1) {
// TODO Auto-generated method stub
if (arg1.endsWith("mp3")) {
return true;
}
return false;
}
});
return filenames;
}
TextView playerTitle_;
TextView playerdurationText_;
ImageButton playControlBtn_;
ImageButton previousBtn_, nextBtn_;
ListView playerFileList_;
Handler myHandler = new Handler();
// stop -1
// playing 0
// pause 1
int playState_ = stop;
static int stop = -1;
static int playing = 0;
static int pause = 1;
MediaPlayer mp_;
String filePath_ = Environment.getExternalStorageDirectory() + "/music/";
String[] fileName_;
int currentfile_ = 0;
StringBuffer durationText_ = new StringBuffer();
ProgressBar palyprogressBar_;
int fileDuration_ = 0;
}
3、布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView android:id="@+id/playertitle" android:layout_width="wrap_content"
android:layout_height="wrap_content">
</TextView>
<TextView android:id="@+id/playerdurationText"
android:layout_width="wrap_content" android:layout_height="wrap_content">
</TextView>
<SeekBar android:id="@+id/playProgressBar" style="?android:attr/progressBarStyleHorizontal"
android:layout_width="fill_parent" android:layout_height="wrap_content">
</SeekBar>
<LinearLayout android:orientation="horizontal"
android:layout_width="fill_parent" android:layout_height="wrap_content">
<ImageButton android:id="@+id/playpreviousfileBtn"
style="@android:style/MediaButton.Previous" />
<ImageButton android:id="@+id/playcontrolBtn" style="@android:style/MediaButton.Play" />
<ImageButton android:id="@+id/playnextfileBtn" style="@android:style/MediaButton.Next" />
</LinearLayout>
<TextView android:text="List:" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:textSize="20sp"></TextView>
<ImageView android:layout_width="fill_parent"
android:layout_height="wrap_content" android:src="@drawable/divider_horizontal_dark_opaque"></ImageView>
<ListView android:id="@+id/playerfileList"
android:layout_width="wrap_content" android:layout_height="wrap_content">
</ListView>
</LinearLayout>
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