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Android 中使用MediaRecorder进行录像详解(视频录制)

测试DEMO,里面注释很详细。简单的视频录制功能.package com.video;import java.io.IOException;import android.app.Activity;import android.content.pm.ActivityInfo;import android.graphics.PixelForma......

测试DEMO,里面注释很详细。简单的视频录制功能.
 
package com.video;
 
import java.io.IOException;
 
import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.graphics.PixelFormat;
import android.media.MediaRecorder;
import android.os.Bundle;
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;
 
/**
 * class name:TestBasicVideo<BR>
 * class description:一个简单的录制视频例子<BR>
 * PS:实现基本的录制保存文件 <BR>
 * 
 * @version 1.00 2011/09/21
 * @author CODYY)peijiangping
 */
public class TestBasicVideo extends Activity implements SurfaceHolder.Callback {
private Button start;// 开始录制按钮
private Button stop;// 停止录制按钮
private MediaRecorder mediarecorder;// 录制视频的类
private SurfaceView surfaceview;// 显示视频的控件
// 用来显示视频的一个接口,我靠不用还不行,也就是说用mediarecorder录制视频还得给个界面看
// 想偷偷录视频的同学可以考虑别的办法。。嗯需要实现这个接口的Callback接口
private SurfaceHolder surfaceHolder;
 
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);// 去掉标题栏
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);// 设置全屏
// 设置横屏显示
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
// 选择支持半透明模式,在有surfaceview的activity中使用。
getWindow().setFormat(PixelFormat.TRANSLUCENT);
setContentView(R.layout.main);
init();
}
 
private void init() {
start = (Button) this.findViewById(R.id.start);
stop = (Button) this.findViewById(R.id.stop);
start.setOnClickListener(new TestVideoListener());
stop.setOnClickListener(new TestVideoListener());
surfaceview = (SurfaceView) this.findViewById(R.id.surfaceview);
SurfaceHolder holder = surfaceview.getHolder();// 取得holder
holder.addCallback(this); // holder加入回调接口
// setType必须设置,要不出错.
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
 
class TestVideoListener implements OnClickListener {
 
@Override
public void onClick(View v) {
if (v == start) {
mediarecorder = new MediaRecorder();// 创建mediarecorder对象
// 设置录制视频源为Camera(相机)
mediarecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
// 设置录制完成后视频的封装格式THREE_GPP为3gp.MPEG_4为mp4
mediarecorder
.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
// 设置录制的视频编码h263 h264
mediarecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
// 设置视频录制的分辨率。必须放在设置编码和格式的后面,否则报错
mediarecorder.setVideoSize(176, 144);
// 设置录制的视频帧率。必须放在设置编码和格式的后面,否则报错
mediarecorder.setVideoFrameRate(20);
mediarecorder.setPreviewDisplay(surfaceHolder.getSurface());
// 设置视频文件输出的路径
mediarecorder.setOutputFile("/sdcard/love.3gp");
try {
// 准备录制
mediarecorder.prepare();
// 开始录制
mediarecorder.start();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (v == stop) {
if (mediarecorder != null) {
// 停止录制
mediarecorder.stop();
// 释放资源
mediarecorder.release();
mediarecorder = null;
}
}
 
}
 
}
 
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
// 将holder,这个holder为开始在oncreat里面取得的holder,将它赋给surfaceHolder
surfaceHolder = holder;
}
 
@Override
public void surfaceCreated(SurfaceHolder holder) {
// 将holder,这个holder为开始在oncreat里面取得的holder,将它赋给surfaceHolder
surfaceHolder = holder;
}
 
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// surfaceDestroyed的时候同时对象设置为null
surfaceview = null;
surfaceHolder = null;
mediarecorder = null;
}
}
 
 
main.xml
 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="horizontal" >
 
    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_weight="1" >
 
        <SurfaceView
            android:id="@+id/surfaceview"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent" />
    </LinearLayout>
 
    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_weight="4"
        android:gravity="center"
        android:orientation="vertical" >
 
        <Button
            android:id="@+id/start"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="Start" />
 
        <Button
            android:id="@+id/stop"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="Stop" />
    </LinearLayout>
 
</LinearLayout>
 
 
AndroidManifest.xml
 
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.video"
    android:versionCode="1"
    android:versionName="1.0" >
 
    <application
        android:icon="@drawable/icon"
        android:label="@string/app_name" >
        <activity
            android:label="@string/app_name"
            android:name=".TestBasicVideo" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />
 
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
 
    <uses-sdk android:minSdkVersion="8" />
 
    <uses-permission android:name="android.permission.CAMERA" >
    </uses-permission>
    <uses-permission android:name="android.permission.RECORD_AUDIO" >
    </uses-permission>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" >
    </uses-permission>
 
</manifest>