Android学习11-----多媒体技术(5) 媒体录制
在Android中通过android.media.MeidaRecoder类实现音频和视频文件的录制操作。
MediaRecorder 的生命周期包括以下几种状态：
1、 Initial 状态 ：当用户通过 MediaRecorder 类的构造方法实例化 MediaRecorder 类对象时将处于初始化状态，即便此时没有任何操作， MediaRecorder 也会占用系统资源，而所有的状态都可以通过 reset() 方法返回到此状态。
2、 Initialized 状态 ：当用户使用 setAudioSource() 或 setVideoSource() 方法后将进入音频录制或视频录制状态，并可以指定一些音频或视频的文件属性，设置完成之后将进入 DataSourceConfigured 状态。
3、 Prepared 状态 ：就绪状态，当用户使用 MediaRecorder 类中的 prepare() 方法时进入就绪状态，表示录制前的状态已经准备就绪。
4、 Recoding 状态 ：但用户使用 MediaRecorder 类中的 start() 方法时，将进入录制状态，并且一直持续到录音或录像操作完毕。
下面使用 MediaRecorder 完成一个音频录制以及音频文件列表
列表显示布局 --recordaudios.xml
<?xml version="1.0" encoding="utf-8"?> <TableLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TableRow> <ImageView android:id="@+id/icon" android:layout_width="fill_parent" android:layout_height="wrap_content" android:src="@drawable/audio_icon" /> <TextView android:id="@+id/filename" android:textSize="16px" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </TableRow> </TableLayout>
audiomain.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content"> <ImageButton android:id="@+id/record" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/record" /> <ImageButton android:id="@+id/stop" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/stop" /> </LinearLayout> <TextView android:id="@+id/info" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="文字提示信息..." /> <ListView android:id="@+id/reclist" android:layout_width="fill_parent" android:layout_height="wrap_content" /> </LinearLayout>
AudioRecorderActivity.java
package com.iflytek.demo;
import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.content.Intent;
import android.media.MediaRecorder;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
public class AudioRecorderActivity extends Activity {
private ImageButton recordBtn = null;
private ImageButton stopBtn = null;
private TextView infoTxt = null;// 提示信息
private ListView reclist = null;// 定义列表视图
private SimpleAdapter recordSimpleAdapter = null;// 用于定义ListView组件的适配器
private MediaRecorder mediaRecorder = null;// MediaRecorder对象
private boolean sdcardExists = false; // 判断sd卡是否存在
private File recordAudioSaveFileDir = null; // 保存所有音频文件的文件夹
private File recordAudioSaveFile = null; // 每次保存音频文件的名称
private String recordAudioSaveFileName = null; // 每次保存音频文件的名称
private String recDir = "xdwangAudio"; // 文件保存的目录路径
private boolean isRecord = false; // 判断是否正在录音
private List<Map<String, Object>> recordFiles = null;// 保存所有的List数据
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.setContentView(R.layout.audiomain);
this.recordBtn = (ImageButton) super.findViewById(R.id.record);
this.stopBtn = (ImageButton) super.findViewById(R.id.stop);
this.infoTxt = (TextView) super.findViewById(R.id.info);
this.reclist = (ListView) super.findViewById(R.id.reclist);
// 如果存在则将状态给了sdcardExists属性
if ((this.sdcardExists = Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED))) { // 判断sd卡是否存在
this.recordAudioSaveFileDir = new File(Environment
.getExternalStorageDirectory().toString()
+ File.separator
+ AudioRecorderActivity.this.recDir + File.separator);// 保存录音目录
if (!this.recordAudioSaveFileDir.exists()) { // 文件夹不存在
this.recordAudioSaveFileDir.mkdirs(); // 创建新的文件夹
}
}
this.stopBtn.setEnabled(false); // 暂停按钮暂时不可用
this.getRecordFiles();// 取得全部的文件列表
this.recordBtn.setOnClickListener(new RecordOnClickListenerImpl());
this.stopBtn.setOnClickListener(new StopOnClickListenerImpl());
this.reclist.setOnItemClickListener(new OnItemClickListenerImpl());
}
/**
*
* @author xdwang
*
* @create 2012-11-15 下午8:10:37
*
* @email:[email protected]
*
* @description 音频录制，默认格式为.3gp
*
*/
private class RecordOnClickListenerImpl implements OnClickListener {
@Override
public void onClick(View v) {
if (AudioRecorderActivity.this.sdcardExists) { // 如果sd卡存在
AudioRecorderActivity.this.recordAudioSaveFileName = AudioRecorderActivity.this.recordAudioSaveFileDir
.toString()
+ File.separator
+ "NoteRecord_"
+ System.currentTimeMillis() + ".3gp"; // 每次的录音文件名称都不一样
AudioRecorderActivity.this.recordAudioSaveFile = new File(
AudioRecorderActivity.this.recordAudioSaveFileName);
AudioRecorderActivity.this.mediaRecorder = new MediaRecorder(); // 实例化对象
// 在进行录制之前必须配置若干个参数
AudioRecorderActivity.this.mediaRecorder
.setAudioSource(MediaRecorder.AudioSource.MIC); // 音频来源是MIC
AudioRecorderActivity.this.mediaRecorder
.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);// 定义输出格式
AudioRecorderActivity.this.mediaRecorder
.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT); // 定义音频编码
AudioRecorderActivity.this.mediaRecorder
.setOutputFile(AudioRecorderActivity.this.recordAudioSaveFileName);// 定义输出文件
try { // 进入到就绪状态
AudioRecorderActivity.this.mediaRecorder.prepare();// 准备录音
} catch (Exception e) {
// Log.i("VideoRecorder", e.toString()) ;
}
AudioRecorderActivity.this.mediaRecorder.start(); // 开始录音
AudioRecorderActivity.this.infoTxt.setText("正在录音中...");
AudioRecorderActivity.this.stopBtn.setEnabled(true); // 停止录音按钮可以使用了
AudioRecorderActivity.this.recordBtn.setEnabled(false);// 录音按钮禁用
AudioRecorderActivity.this.isRecord = true; // 正在录音
}
}
}
/**
*
* @author xdwang
*
* @create 2012-11-15 下午8:48:15
*
* @email:[email protected]
*
* @description 暂停录音
*
*/
private class StopOnClickListenerImpl implements OnClickListener {
@Override
public void onClick(View v) {
if (AudioRecorderActivity.this.isRecord) { // 正在录音
AudioRecorderActivity.this.mediaRecorder.stop(); // 停止
AudioRecorderActivity.this.mediaRecorder.release(); // 释放资源
AudioRecorderActivity.this.recordBtn.setEnabled(true);// 录音按钮启用
AudioRecorderActivity.this.stopBtn.setEnabled(false);// 停止录音按钮禁用
AudioRecorderActivity.this.infoTxt.setText("录音结束，文件路径为："
+ AudioRecorderActivity.this.recordAudioSaveFileName);
AudioRecorderActivity.this.getRecordFiles();// 重新加载列表
}
}
}
/**
* @descrption 取得全部录音文件
* @author xdwang
* @create 2012-11-15下午7:39:04
*/
private void getRecordFiles() { // 将一个文件夹之中的全部文件列出
this.recordFiles = new ArrayList<Map<String, Object>>();
if (this.sdcardExists) { // 如果sd卡存在
File files[] = this.recordAudioSaveFileDir.listFiles(); // 列出目录中的文件
for (int x = 0; x < files.length; x++) {
Map<String, Object> fileInfo = new HashMap<String, Object>();
fileInfo.put("filename", files[x].getName());// 增加显示内容
this.recordFiles.add(fileInfo);// 保存数据
}
this.recordSimpleAdapter = new SimpleAdapter(this,
this.recordFiles, R.layout.recordaudios,
new String[] { "filename" }, new int[] { R.id.filename });// 实例化适配器
this.reclist.setAdapter(this.recordSimpleAdapter);// 定义列表视图
}
}
/**
*
* @author xdwang
*
* @create 2012-11-15 下午9:02:33
*
* @email:[email protected]
*
* @description 指定音频文件播放的操作
*
*/
private class OnItemClickListenerImpl implements OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {// 选项单击
if (AudioRecorderActivity.this.recordSimpleAdapter
.getItem(position) instanceof Map) {// 判断是否是Map实例
Map<?, ?> map = (Map<?, ?>) AudioRecorderActivity.this.recordSimpleAdapter
.getItem(position);// 取出指定位置的内容
Uri uri = Uri.fromFile(new File(
AudioRecorderActivity.this.recordAudioSaveFileDir
.toString()
+ File.separator
+ map.get("filename")));// 定义操作的Uri
Intent intent = new Intent(Intent.ACTION_VIEW);// 指定Action
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);// 增加标记
intent.setDataAndType(uri, "audio/mp3");// 设置数据播放的MIME
AudioRecorderActivity.this.startActivity(intent);// 启动Activity
}
}
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.iflytek.demo"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".AudioRecorderActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
录制视频与录制音频文件的功能类似，唯一的区别就是在视频录制中需要定义一个额外的SurfaceView组件，以捕获摄像头采集到的数据。
范例：视频录制、列表显示、视频播放
recordvideo.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content"> <ImageButton android:id="@+id/record" android:layout_width="wrap_content" android:layout_height="fill_parent" android:src="@drawable/record"/> <ImageButton android:id="@+id/stop" android:layout_width="wrap_content" android:layout_height="fill_parent" android:src="@drawable/stop"/> <ImageButton android:id="@+id/browser" android:layout_width="wrap_content" android:layout_height="fill_parent" android:src="@drawable/browser"/> </LinearLayout> <TextView android:id="@+id/info" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="文字提示信息" /> <SurfaceView android:id="@+id/surface" android:layout_width="fill_parent" android:layout_height="fill_parent" /> </LinearLayout>
VideoRecorderActivity.java
package com.iflytek.demo;
import java.io.File;
import java.util.List;
import android.app.Activity;
import android.content.Intent;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.KeyEvent;
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.ImageButton;
import android.widget.TextView;
public class VideoRecorderActivity extends Activity {
private ImageButton recordBtn = null;
private ImageButton stopBtn = null;
private ImageButton browserBtn = null;
private TextView infoTxt = null;
private MediaRecorder mediaRecorder = null;
private File recordVideoSaveFile = null;// 文件保存目录路径
private File recordVideoSaveFileDir = null;// 文件保存目录
private String recordVideoSaveFileName = null;// 音频文件保存名称
private String recDir = "xdwangvideo";// 保存目录
private boolean sdcardExists = false; // SD卡存在的标记
private boolean isRecord = false;// 判断是否正在录音
private SurfaceView surfaceView = null;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.requestWindowFeature(Window.FEATURE_NO_TITLE); // 不显示标题
super.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);// 设置全屏
super.getWindow().addFlags(
WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); // 高亮的风格显示
super.setContentView(R.layout.recordvideo);
this.recordBtn = (ImageButton) super.findViewById(R.id.record);
this.stopBtn = (ImageButton) super.findViewById(R.id.stop);
this.browserBtn = (ImageButton) super.findViewById(R.id.browser);
this.infoTxt = (TextView) super.findViewById(R.id.info);
this.surfaceView = (SurfaceView) super.findViewById(R.id.surface);
this.surfaceView.getHolder().setType(
SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);//设置缓冲类型
this.surfaceView.getHolder().setFixedSize(480, 800);//设置分辨率
if ((this.sdcardExists = Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED))) {//判断sd卡是否存在
this.recordVideoSaveFileDir = new File(Environment
.getExternalStorageDirectory().toString()
+ File.separator
+ VideoRecorderActivity.this.recDir + File.separator); // 保存录音目录
if (!this.recordVideoSaveFileDir.exists()) {
this.recordVideoSaveFileDir.mkdirs(); // 创建新文件夹
}
}
this.recordBtn.setOnClickListener(new RecordOnClickListenerImpl());
this.stopBtn.setOnClickListener(new StopOnClickListenerImpl());
this.browserBtn
.setOnClickListener(new BrowserOnClickListenerImpl());
this.stopBtn.setEnabled(false); // 停止录象的按钮暂时不可用
}
/**
*
* @author xdwang
*
* @create 2012-11-15 下午09:25:32
*
* @email:[email protected]
*
* @description 视频录制
*
*/
private class RecordOnClickListenerImpl implements OnClickListener {
@Override
public void onClick(View v) {
if (VideoRecorderActivity.this.sdcardExists) { // sd卡存在
VideoRecorderActivity.this.recordVideoSaveFileName = VideoRecorderActivity.this.recordVideoSaveFileDir
.toString()
+ File.separator
+ "XdwangVideo_"
+ System.currentTimeMillis() + ".3gp";// 文件的路径名称
VideoRecorderActivity.this.recordVideoSaveFile = new File(
VideoRecorderActivity.this.recordVideoSaveFileName);// 文件路径
VideoRecorderActivity.this.mediaRecorder = new MediaRecorder();
VideoRecorderActivity.this.mediaRecorder.reset(); // 重置
VideoRecorderActivity.this.mediaRecorder
.setVideoSource(MediaRecorder.VideoSource.CAMERA);// 设置视频源，从摄像头来
VideoRecorderActivity.this.mediaRecorder
.setAudioSource(MediaRecorder.AudioSource.MIC);// 设置音频源，表示从麦克风进来
VideoRecorderActivity.this.mediaRecorder
.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);// 设置录制完成后视频的封装格式THREE_GPP为3gp.MPEG_4为mp4
VideoRecorderActivity.this.mediaRecorder
.setVideoEncoder(MediaRecorder.VideoEncoder.H264);// 设置录制的视频编码h263
// h264,注意这里如果写H263会出现错误
VideoRecorderActivity.this.mediaRecorder
.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);// 设置音频的编码
VideoRecorderActivity.this.mediaRecorder
.setOutputFile(VideoRecorderActivity.this.recordVideoSaveFileName);// 设置视频保存路径
Camera camera = Camera.open(0); // 取得第一个摄像头，可能存在多个，0表示后面的，1表示前置摄像头
Parameters parameters = camera.getParameters();
List<Camera.Size> previewSizes = parameters
.getSupportedPreviewSizes();
Camera.Size pictureSize = previewSizes.get(0);
VideoRecorderActivity.this.mediaRecorder.setVideoSize(
pictureSize.width, pictureSize.height);// 视频分辨率
// WindowManager wm = (WindowManager)
// getSystemService(Context.WINDOW_SERVICE);
// // 获取窗口服务
// Display display = wm.getDefaultDisplay();// 获取屏幕信息
// VideoRecorderActivity.this.mediaRecorder.setVideoSize(
// display.getWidth(), display.getHeight());// 视频分辨率
VideoRecorderActivity.this.mediaRecorder.setVideoFrameRate(10);// 设置每秒为10帧
// 必须放在设置编码和格式的后面，否则报错
VideoRecorderActivity.this.mediaRecorder
.setPreviewDisplay(VideoRecorderActivity.this.surfaceView
.getHolder().getSurface());// 定义视频显示
try {
VideoRecorderActivity.this.mediaRecorder.prepare();// 准备录像
} catch (Exception e) {
Log.i("VideoRecorderActivity", e.toString());
}
VideoRecorderActivity.this.mediaRecorder.start();// 开始录像
VideoRecorderActivity.this.infoTxt.setText("正在录象中...");
VideoRecorderActivity.this.stopBtn.setEnabled(true);
VideoRecorderActivity.this.recordBtn.setEnabled(false);
VideoRecorderActivity.this.isRecord = true;// 正在录像
}
}
}
/**
*
* @author xdwang
*
* @create 2012-11-15 下午09:30:23
*
* @email:[email protected]
*
* @description 停止录制视频
*
*/
private class StopOnClickListenerImpl implements OnClickListener {
@Override
public void onClick(View v) {
if (VideoRecorderActivity.this.isRecord) {
VideoRecorderActivity.this.mediaRecorder.stop();
VideoRecorderActivity.this.mediaRecorder.release();
VideoRecorderActivity.this.stopBtn.setEnabled(false);
VideoRecorderActivity.this.recordBtn.setEnabled(true);
VideoRecorderActivity.this.infoTxt.setText("录象结束，文件路径为："
+ VideoRecorderActivity.this.recordVideoSaveFile);
}
}
}
/**
*
* @author xdwang
*
* @create 2012-11-15 下午09:36:36
*
* @email:[email protected]
*
* @description Activity跳转
*
*/
private class BrowserOnClickListenerImpl implements OnClickListener {
@Override
public void onClick(View v) {
Intent intent = new Intent(VideoRecorderActivity.this,
BroswerActivity.class);
VideoRecorderActivity.this.startActivity(intent);
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
super.finish();
}
return false;
}
}
recordfiles.xml（BroswerActivity 程序进行ListView显示）
<?xml version="1.0" encoding="utf-8"?> <TableLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TableRow> <ImageView android:id="@+id/icon" android:layout_width="fill_parent" android:layout_height="wrap_content" android:src="@drawable/video_icon" /> <TextView android:id="@+id/filename" android:textSize="25px" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </TableRow> </TableLayout>
broswer.xml（BroswerActivity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="fill_parent" android:layout_height="fill_parent"> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center"> <TextView android:id="@+id/info" android:textSize="25px" android:gravity="center" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="视频文件列表" /> <ImageButton android:id="@+id/back" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/back"/> </LinearLayout> <ListView android:id="@+id/videolist" android:layout_width="fill_parent" android:layout_height="fill_parent" /> </LinearLayout>
BroswerActivity.java
package com.iflytek.demo; import java.io.File; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.os.Environment; import android.view.View; import android.view.View.OnClickListener; import android.view.Window; import android.view.WindowManager; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ImageButton; import android.widget.ListView; import android.widget.SimpleAdapter; /** * @author xdwang * * @create 2012-11-15 下午10:15:22 * * @email:[email protected] * * @description 视频文件浏览的Activity操作，提供ListView显示 * */ public class BroswerActivity extends Activity { private ImageButton backBtn = null; private ListView videolist = null;// 定义列表视图 private SimpleAdapter recordSimpleAdapter = null;// 适配器 private List<Map<String, Object>> recordFiles = null;// 保存所有的List数据 private String recDir = "xdwangvideo";// 保存目录 private File recordVideoSaveFileDir = null;// 文件保存目录 private boolean sdcardExists = false;// sd卡是否存在 @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); super.requestWindowFeature(Window.FEATURE_NO_TITLE); // 不显示标题 super.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); super.getWindow().addFlags( WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); // 高亮的风格显示 super.setContentView(R.layout.broswer); if ((this.sdcardExists = Environment.getExternalStorageState().equals( Environment.MEDIA_MOUNTED))) { this.recordVideoSaveFileDir = new File(Environment .getExternalStorageDirectory().toString() + File.separator + BroswerActivity.this.recDir + File.separator); if (!this.recordVideoSaveFileDir.exists()) { this.recordVideoSaveFileDir.mkdirs(); } } this.backBtn = (ImageButton) super.findViewById(R.id.back); this.videolist = (ListView) super.findViewById(R.id.videolist); this.getRecordFiles();// 取得全部的文件列表 this.videolist.setOnItemClickListener(new OnItemClickListenerImpl()); this.backBtn.setOnClickListener(new BackOnClickListenerImpl()); } /** * @descrption 加载给定目录中的全部文件 * @author xdwang * @create 2012-11-15下午10:26:55 */ private void getRecordFiles() {// 取得全部录音文件 this.recordFiles = new ArrayList<Map<String, Object>>(); if (this.sdcardExists) { File files[] = this.recordVideoSaveFileDir.listFiles(); for (int x = 0; x < files.length; x++) { Map<String, Object> fileInfo = new HashMap<String, Object>(); fileInfo.put("filename", files[x].getName());// 增加显示内容 this.recordFiles.add(fileInfo);// 保存数据 } this.recordSimpleAdapter = new SimpleAdapter(this, this.recordFiles, R.layout.recordfiles, new String[] { "filename" }, new int[] { R.id.filename });// 实例化适配器 this.videolist.setAdapter(this.recordSimpleAdapter);// 定义列表视图 } } /** * * @author xdwang * * @create 2012-11-15 下午10:37:23 * * @email:[email protected] * * @description 返回操作 * */ private class BackOnClickListenerImpl implements OnClickListener { @Override public void onClick(View v) { Intent it = new Intent(BroswerActivity.this, VideoRecorderActivity.class); BroswerActivity.this.startActivity(it); } } /** * * @author xdwang * * @create 2012-11-15 下午10:43:41 * * @email:[email protected] * * @description 单击视频选项进行播放 * */ private class OnItemClickListenerImpl implements OnItemClickListener { @Override public void onItemClick(AdapterView<?> adapter, View view, int position, long id) {// 选项单击 if (BroswerActivity.this.recordSimpleAdapter.getItem(position) instanceof Map) {// 判断是否是Map实例 Map<?, ?> map = (Map<?, ?>) BroswerActivity.this.recordSimpleAdapter .getItem(position);// 取得指定位置的内容 Intent intent = new Intent(BroswerActivity.this, PlayVideoActivity.class);// 指定Intent intent.putExtra("filepath", BroswerActivity.this.recordVideoSaveFileDir.toString() + File.separator + map.get("filename").toString()); BroswerActivity.this.startActivity(intent);// 启动Activity } } } }
play.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content"> <ImageButton android:id="@+id/play" android:layout_width="wrap_content" android:layout_height="fill_parent" android:src="@drawable/play"/> <ImageButton android:id="@+id/stop" android:layout_width="wrap_content" android:layout_height="fill_parent" android:src="@drawable/stop"/> <ImageButton android:id="@+id/back" android:layout_width="wrap_content" android:layout_height="fill_parent" android:src="@drawable/back"/> </LinearLayout> <SurfaceView android:id="@+id/surfaceView" android:layout_width="fill_parent" android:layout_height="fill_parent" /> </LinearLayout>
PlayVideoActivity.java
package com.iflytek.demo; import android.app.Activity; import android.content.Intent; import android.media.AudioManager; import android.media.MediaPlayer; import android.os.Bundle; import android.view.KeyEvent; 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.ImageButton; /** * @author xdwang * * @create 2012-11-15 下午10:50:57 * * @email:[email protected] * * @description 播放视频的Activity，使用Mediaplayer完成播放 * */ public class PlayVideoActivity extends Activity { private ImageButton playBtn = null; private ImageButton stopBtn = null; private ImageButton backBtn = null; private MediaPlayer mediaPlayer = null; private SurfaceView sufaceView = null; private SurfaceHolder surfaceHolder = null; private String filepath = null;// 播放文件路径 @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); super.requestWindowFeature(Window.FEATURE_NO_TITLE); // 不显示标题 super.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); super.getWindow().addFlags( WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); // 高亮的风格显示 super.setContentView(R.layout.play); this.filepath = super.getIntent().getStringExtra("filepath"); this.playBtn = (ImageButton) super.findViewById(R.id.play); this.stopBtn = (ImageButton) super.findViewById(R.id.stop); this.backBtn = (ImageButton) super.findViewById(R.id.back); this.sufaceView = (SurfaceView) super.findViewById(R.id.surfaceView); this.surfaceHolder = this.sufaceView.getHolder(); this.surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);// 设置SurfaceView类型 this.mediaPlayer = new MediaPlayer(); this.mediaPlayer.reset();// 重置操作 try { this.mediaPlayer.setDataSource(this.filepath);// 设置播放文件的路径 } catch (Exception e) { } this.playBtn.setOnClickListener(new PlayOnClickListenerImpl()); this.stopBtn.setOnClickListener(new StopOnClickListenerImpl()); this.backBtn.setOnClickListener(new BackOnClickListenerImpl()); } /** * * @author xdwang * * @create 2012-11-14 下午10:57:56 * * @email:[email protected] * * @description 视频播放 * */ private class PlayOnClickListenerImpl implements OnClickListener { @Override public void onClick(View v) { PlayVideoActivity.this.mediaPlayer .setAudioStreamType(AudioManager.STREAM_MUSIC);// 设置音频类型 PlayVideoActivity.this.mediaPlayer .setDisplay(PlayVideoActivity.this.surfaceHolder);// 设置显示区域 try { PlayVideoActivity.this.mediaPlayer.prepare();// 预备状态 PlayVideoActivity.this.mediaPlayer.start();// 播放视频 } catch (Exception e) { } } } /** * * @author xdwang * * @create 2012-11-15 下午10:59:06 * * @email:[email protected] * * @description 暂停视频 * */ private class StopOnClickListenerImpl implements OnClickListener { @Override public void onClick(View v) { PlayVideoActivity.this.mediaPlayer.stop();// 停止播放 } } /** * * @author xdwang * * @create 2012-11-15下午11:03:16 * * @email:[email protected] * * @description 返回 * */ private class BackOnClickListenerImpl implements OnClickListener { @Override public void onClick(View v) { Intent it = new Intent(PlayVideoActivity.this, BroswerActivity.class); PlayVideoActivity.this.startActivity(it); } } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK) { this.mediaPlayer.stop(); this.mediaPlayer.release(); super.finish(); } return false; } }
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.iflytek.demo"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
<uses-permission android:name="android.permission.CAMERA" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".VideoRecorderActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".BroswerActivity"
android:screenOrientation="landscape" />
<activity
android:name="PlayVideoActivity"
android:screenOrientation="landscape" />
</application>
</manifest>