提前工作,往sd卡里放音乐文件
1、布局文件main.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="歌曲名:"/> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="blueflawer.mp3"/> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="播放" android:id="@+id/play_pause"/> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="重置" android:id="@+id/reset"/> <SeekBar android:layout_width="fill_parent" android:layout_height="wrap_content" android:id="@+id/seekbar"/> </LinearLayout>
2、activity类
package cn.csdn.activity; import java.io.File; import java.io.IOException; import java.util.Timer; import java.util.TimerTask; import android.app.Activity; import android.media.MediaPlayer; import android.os.Bundle; import android.os.Environment; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.SeekBar; import android.widget.SeekBar.OnSeekBarChangeListener; public class MyPlayerActivity extends Activity { private Button play_pause, reset; private SeekBar seekbar; private boolean ifplay = false; private MediaPlayer player = null; private String musicName = "blueflawer.mp3"; private boolean iffirst = false; private Timer mTimer; private TimerTask mTimerTask; private boolean isChanging=false;//互斥变量,防止定时器与SeekBar拖动时进度冲突 public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); player = new MediaPlayer(); findViews();// 各组件 } private void findViews() { play_pause = (Button) findViewById(R.id.play_pause); reset = (Button) findViewById(R.id.reset); play_pause.setOnClickListener(new MyClick()); reset.setOnClickListener(new MyClick()); seekbar = (SeekBar) findViewById(R.id.seekbar); seekbar.setOnSeekBarChangeListener(new MySeekbar()); } class MyClick implements OnClickListener { public void onClick(View v) { File file = new File(Environment.getExternalStorageDirectory(), musicName); // 判断有没有要播放的文件 if (file.exists()) { switch (v.getId()) { case R.id.play_pause: if (player != null && !ifplay) { play_pause.setText("暂停"); if (!iffirst) { player.reset(); try { player.setDataSource(file.getAbsolutePath()); player.prepare();// 准备 } catch (IllegalArgumentException e) { e.printStackTrace(); } catch (IllegalStateException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } seekbar.setMax(player.getDuration());//设置进度条 //----------定时器记录播放进度---------// mTimer = new Timer(); mTimerTask = new TimerTask() { @Override public void run() { if(isChanging==true) { return; } seekbar.setProgress(player.getCurrentPosition()); } }; mTimer.schedule(mTimerTask, 0, 10); iffirst=true; } player.start();// 开始 ifplay = true; } else if (ifplay) { play_pause.setText("继续"); player.pause(); ifplay = false; } break; case R.id.reset: if (ifplay) { player.seekTo(0); } else { player.reset(); try { player.setDataSource(file.getAbsolutePath()); player.prepare();// 准备 player.start();// 开始 } catch (IllegalArgumentException e) { e.printStackTrace(); } catch (IllegalStateException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } break; } } } } //进度条处理 class MySeekbar implements OnSeekBarChangeListener { public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { } public void onStartTrackingTouch(SeekBar seekBar) { isChanging=true; } public void onStopTrackingTouch(SeekBar seekBar) { player.seekTo(seekbar.getProgress()); isChanging=false; } } //来电处理 protected void onDestroy() { if(player != null){ if(player.isPlaying()){ player.stop(); } player.release(); } super.onDestroy(); } protected void onPause() { if(player != null){ if(player.isPlaying()){ player.pause(); } } super.onPause(); } protected void onResume() { if(player != null){ if(!player.isPlaying()){ player.start(); } } super.onResume(); } }
时间: 2024-10-13 00:15:42