--------------------------------------------AndroidManifest.xml----------------------------------
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.ch19"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="10"
android:targetSdkVersion="15" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/title_activity_main" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
--------------------------------------------activity_main.xml-------------------------------------
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:weightSum="1"
android:orientation="vertical" >
<SurfaceView
android:id="@+id/surfaceVIew"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="0.15"
tools:context=".MainActivity" />
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="0.85">
<Button
android:id="@+id/btn1"
android:text="开唱"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Button
android:id="@+id/btn2"
android:text="暂停"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Button
android:id="@+id/btn3"
android:text="停止"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Button
android:id="@+id/btn4"
android:text="调低音量"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Button
android:id="@+id/btn5"
android:text="调高音量"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
</LinearLayout>
--------------------------------------------MainActivity.java--------------------------------------
package com.ch19;
import java.io.File;
import java.io.IOException;
import android.app.Activity;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
/**
*
* 项目名称:com.ch19
* 类名称:MainActivity
* 类描述:播放、暂停、停止、增加音量、减少音量
* 创建人:方勇
* 创建时间:2012-11-29 下午1:36:47
* Copyright (c) 方勇-版权所有
*/
public class MainActivity extends Activity {
private Button btn_play, btn_pause, btn_stop, btn_low, btn_height;
private SurfaceView mSurfaceView;
/* 播放视频对象 */
private MediaPlayer mediaPlayer;
/* 系统声音 */
private AudioManager audioManager;
/* 播放位置 */
private int position;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setWindow();
setContentView(R.layout.activity_main);
findViews();
setListeners();
mediaPlayer = new MediaPlayer();
setSurfaceView();
}
// 横竖屏切换时的处理
@Override
protected void onSaveInstanceState(Bundle outState) {
if (mediaPlayer != null && mediaPlayer.isPlaying()) {
outState.putInt("position", mediaPlayer.getCurrentPosition());
}
super.onSaveInstanceState(outState);
}
// 横竖屏切换后的处理
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
if (savedInstanceState.containsKey("position")) {
position = savedInstanceState.getInt("position");
}
super.onRestoreInstanceState(savedInstanceState);
}
/* 实例化UI */
private void findViews() {
btn_play = (Button) findViewById(R.id.btn1);
btn_pause = (Button) findViewById(R.id.btn2);
btn_stop = (Button) findViewById(R.id.btn3);
btn_low = (Button) findViewById(R.id.btn4);
btn_height = (Button) findViewById(R.id.btn5);
mSurfaceView = (SurfaceView) findViewById(R.id.surfaceVIew);
audioManager = (AudioManager) getSystemService(AUDIO_SERVICE);
}
/* 为5个按钮设置监听 */
private void setListeners() {
btn_play.setOnClickListener(onClickListener);
btn_pause.setOnClickListener(onClickListener);
btn_stop.setOnClickListener(onClickListener);
btn_low.setOnClickListener(onClickListener);
btn_height.setOnClickListener(onClickListener);
}
/* 屏幕为全屏、无标题 */
private void setWindow() {
requestWindowFeature(Window.FEATURE_NO_TITLE);// 无标题
// // 设置窗体始终点亮
// getWindow().setFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON,
// WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
// // 设置窗体背景模糊
// getWindow().setFlags(WindowManager.LayoutParams.FLAG_BLUR_BEHIND, WindowManager.LayoutParams.FLAG_BLUR_BEHIND);
// 设置窗体全屏
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
}
/* 播放视频 */
private void playMedia() {
/* 初始化状态 */
mediaPlayer.reset();
/* 设置声音流类型 */
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
/* 设置mp3\mp4加载路径 */
File file = new File(Environment.getExternalStorageDirectory(), "sv.3gp");
try {
mediaPlayer.setDataSource(file.getAbsolutePath());
// 缓冲
mediaPlayer.prepare();
// 开始播放
mediaPlayer.start();
// 具体位置
Log.i("position", position + "------");
mediaPlayer.seekTo(position);
// 视频输出到View
mediaPlayer.setDisplay(mSurfaceView.getHolder());
// 重置位置为0
position = 0;
} 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();
}
}
/* 设置surfaceView视图 */
private void setSurfaceView() {
// creates a "push" surface
mSurfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
// 设置事件,回调函数
mSurfaceView.getHolder().addCallback(new SurfaceHolder.Callback() {
/* SurfaceView创建时 */
@Override
public void surfaceCreated(SurfaceHolder holder) {
if (position > 0) {
playMedia();
position = 0;
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
// TODO Auto-generated method stub
}
/* SurfaceView销毁视图 */
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
if (mediaPlayer.isPlaying()) {
mediaPlayer.stop();
}
/* Activity销毁时停止播放,释放资源。不做这个操作,即使退出,还是能听到视频的声音 */
mediaPlayer.release();
}
});
}
// 设置5个按钮的监听事件
private OnClickListener onClickListener = new OnClickListener() {
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btn1:// 播放
if (mediaPlayer != null && mediaPlayer.isPlaying()) {
return;
} else {
playMedia();
}
break;
case R.id.btn2:// 暂停
if (mediaPlayer != null && mediaPlayer.isPlaying()) {
position = mediaPlayer.getCurrentPosition();
mediaPlayer.pause();
} else {
return;
}
break;
case R.id.btn3:// 停止
if (mediaPlayer != null && mediaPlayer.isPlaying()) {
mediaPlayer.stop();
position = 0;
} else {
return;
}
break;
case R.id.btn4:// 调小音量
// 获取当前的音乐音量
int volume = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
Log.v("Volume", "volume" + volume);
// 音量>0
if (volume > 0) {
audioManager.adjustStreamVolume(AudioManager.STREAM_MUSIC, AudioManager.ADJUST_LOWER, 0);
} else {
return;
}
break;
case R.id.btn5:// 调大音量
volume = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
// 音量<100
if (volume < audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC)) {
audioManager.adjustStreamVolume(AudioManager.STREAM_MUSIC, AudioManager.ADJUST_RAISE, 0);
} else {
return;
}
break;
}
}
};
}
--------------------------------------------效果----------------------------------------------------
<!--EndFragment-->