<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

tools:context

<EditText

android:id="@+id/et_path"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:hint="請輸入要播放檔案的路徑" />

<LinearLayout

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:orientation="horizontal" >

<Button

android:id

android:onClick="play"

android:layout_width="0dip"

android:layout_height="wrap_content"

android:layout_weight="1"

android:text="播放" />

<Button

android:id="@+id/bt_pause"

android:onClick="pause"

android:layout_width="0dip"

android:layout_height="wrap_content"

android:layout_weight="1"

android:text

<Button

android:id="@+id/bt_stop"

android:onClick="stop"

android:layout_width="0dip"

android:layout_height="wrap_content"

android:layout_weight="1"

android:text="停止" />

<Button

android:id="@+id/bt_replay"

android:onClick="replay"

android:layout_width="0dip"

android:layout_height="wrap_content"

android:layout_weight="1"

android:text="重播" />

</LinearLayout>

</LinearLayout>

package com.itheima.musicplayer;

import java.io.File;

import java.io.IOException;

import android.app.Activity;

import android.media.AudioManager;

import android.media.MediaPlayer;

import android.media.MediaPlayer.OnCompletionListener;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

publicclass MainActivity extends Activity {

private EditText et_path;

private MediaPlayer mediaPlayer;

private Button bt_play,bt_pause,bt_stop,bt_replay;

@Override

protectedvoid onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

et_path = (EditText) findViewById(R.id.et_path);

bt_play = (Button) findViewById(R.id.bt_play);

bt_pause = (Button) findViewById(R.id.bt_pause);

bt_stop = (Button) findViewById(R.id.bt_stop);

bt_replay = (Button) findViewById(R.id.bt_replay);

}

/**

* 播放

* @param view

*/

publicvoid play(View view) {

String filepath = et_path.getText().toString().trim();

File file = new File(filepath);

if(file.exists()){

try {

mediaPlayer = new MediaPlayer();

mediaPlayer.setDataSource(filepath);//設定播放的資料來源。

mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

mediaPlayer.prepare();//準備開始播放播放的邏輯是c程式碼在新的執行緒裡面執行。

mediaPlayer.start();

bt_play.setEnabled(false);

mediaPlayer.setOnCompletionListener(new OnCompletionListener() {

@Override

publicvoid onCompletion(MediaPlayer mp) {

bt_play.setEnabled(true);

}

});

} catch (Exception e) {

e.printStackTrace();

Toast.makeText(this, "播放失敗", 0).show();

}

}else{

Toast.makeText(this, "檔案不存在，請檢查檔案的路徑", 0).show();

}

}

/**

* 暫停

* @param view

*/

publicvoid pause(View view) {

if("繼續".equals(bt_pause.getText().toString())){

mediaPlayer.start();

bt_pause.setText("暫停");

return;

}

if(mediaPlayer!=null&&mediaPlayer.isPlaying()){

//這裡表示的是暫停功能

mediaPlayer.pause();

bt_pause.setText("繼續");

}

}

/**

* 停止

* @param view

*/

publicvoid stop(View view) {

if(mediaPlayer!=null&&mediaPlayer.isPlaying()){

//通過stop方法停止播放音樂

mediaPlayer.stop();

mediaPlayer.release();

mediaPlayer = null;

}

bt_pause.setText("暫停");

bt_play.setEnabled(true);

}

/**

* 重播

* @param