Android学习11-----多媒体技术(5) 媒体录制
16lz
2021-01-26
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"?><TableLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="fill_parent"android:layout_height="fill_parent"><TableRow><ImageViewandroid:id="@+id/icon" android:layout_width="fill_parent"android:layout_height="wrap_content" android:src="@drawable/audio_icon" /><TextViewandroid: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"><ImageButtonandroid:id="@+id/record"android:layout_width="wrap_content"android:layout_height="wrap_content"android:src="@drawable/record" /><ImageButtonandroid: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..." /><ListViewandroid: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. */@Overridepublic 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:xdwangiflytek@gmail.com * * @description 音频录制，默认格式为.3gp * */private class RecordOnClickListenerImpl implements OnClickListener {@Overridepublic 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MICAudioRecorderActivity.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:xdwangiflytek@gmail.com * * @description 暂停录音 * */private class StopOnClickListenerImpl implements OnClickListener {@Overridepublic 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:xdwangiflytek@gmail.com * * @description 指定音频文件播放的操作 * */private class OnItemClickListenerImpl implements OnItemClickListener {@Overridepublic 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UriIntent intent = new Intent(Intent.ACTION_VIEW);// 指定Actionintent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);// 增加标记intent.setDataAndType(uri, "audio/mp3");// 设置数据播放的MIMEAudioRecorderActivity.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"><ImageButtonandroid:id="@+id/record"android:layout_width="wrap_content"android:layout_height="fill_parent" android:src="@drawable/record"/><ImageButtonandroid:id="@+id/stop"android:layout_width="wrap_content"android:layout_height="fill_parent" android:src="@drawable/stop"/><ImageButtonandroid: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" /><SurfaceViewandroid: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. */@Overridepublic 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:xdwangiflytek@gmail.com * * @description 视频录制 * */private class RecordOnClickListenerImpl implements OnClickListener {@Overridepublic 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mp4VideoRecorderActivity.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:xdwangiflytek@gmail.com * * @description 停止录制视频 * */private class StopOnClickListenerImpl implements OnClickListener {@Overridepublic 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:xdwangiflytek@gmail.com * * @description Activity跳转 * */private class BrowserOnClickListenerImpl implements OnClickListener {@Overridepublic void onClick(View v) {Intent intent = new Intent(VideoRecorderActivity.this,BroswerActivity.class);VideoRecorderActivity.this.startActivity(intent);}}@Overridepublic 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"?><TableLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="fill_parent"android:layout_height="fill_parent"><TableRow><ImageViewandroid:id="@+id/icon" android:layout_width="fill_parent"android:layout_height="wrap_content" android:src="@drawable/video_icon" /><TextViewandroid: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" /><ImageButtonandroid:id="@+id/back"android:layout_width="wrap_content"android:layout_height="wrap_content" android:src="@drawable/back"/></LinearLayout><ListViewandroid: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:xdwangiflytek@gmail.com * * @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@Overridepublic 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:xdwangiflytek@gmail.com * * @description 返回操作 * */private class BackOnClickListenerImpl implements OnClickListener {@Overridepublic 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:xdwangiflytek@gmail.com * * @description 单击视频选项进行播放 * */private class OnItemClickListenerImpl implements OnItemClickListener {@Overridepublic 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Intentintent.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"><ImageButtonandroid:id="@+id/play"android:layout_width="wrap_content"android:layout_height="fill_parent" android:src="@drawable/play"/><ImageButtonandroid:id="@+id/stop"android:layout_width="wrap_content"android:layout_height="fill_parent" android:src="@drawable/stop"/><ImageButtonandroid:id="@+id/back"android:layout_width="wrap_content"android:layout_height="fill_parent" android:src="@drawable/back"/></LinearLayout><SurfaceViewandroid: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:xdwangiflytek@gmail.com * * @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@Overridepublic 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:xdwangiflytek@gmail.com * * @description 视频播放 * */private class PlayOnClickListenerImpl implements OnClickListener {@Overridepublic 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:xdwangiflytek@gmail.com * * @description 暂停视频 * */private class StopOnClickListenerImpl implements OnClickListener {@Overridepublic void onClick(View v) {PlayVideoActivity.this.mediaPlayer.stop();// 停止播放}}/** * * @author xdwang * * @create 2012-11-15下午11:03:16 * * @email:xdwangiflytek@gmail.com * * @description 返回 * */private class BackOnClickListenerImpl implements OnClickListener {@Overridepublic void onClick(View v) {Intent it = new Intent(PlayVideoActivity.this,BroswerActivity.class);PlayVideoActivity.this.startActivity(it);}}@Overridepublic 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>
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