【移动应用开发技术】Android 录制视频

【移动应用开发技术】Android录制视频

Activity代码：package

eoe.demo.Media;

import

java.io.File;

import

java.io.IOException;

import

android.app.Activity;

import

android.media.MediaRecorder;

import

android.os.Bundle;

import

android.os.Environment;

import

android.view.SurfaceHolder;

import

android.view.SurfaceView;

import

android.view.View;

import

android.view.View.OnClickListener;

import

android.widget.Button;public

class

VideoActivity

extends

Activity

{private

File

myRecAudioFile;private

SurfaceView

mSurfaceView;private

SurfaceHolder

mSurfaceHolder;private

Button

buttonStart;private

Button

buttonStop;private

File

dir;private

MediaRecorder

recorder;

@Overridepublic

void

onCreate(Bundle

savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.video);

mSurfaceView

=

(SurfaceView)

findViewById(R.id.videoView);

mSurfaceHolder

=

mSurfaceView.getHolder();

mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

buttonStart=(Button)findViewById(R.id.start);

buttonStop=(Button)findViewById(R.id.stop);

File

defaultDir

=

Environment.getExternalStorageDirectory();

String

path

=

defaultDir.getAbsolutePath()+File.separator+"V"+File.separator;//创建文件夹存放视频dir

=

new

File(path);

if(!dir.exists()){

dir.mkdir();

}

recorder

=

new

MediaRecorder();

buttonStart.setOnClickListener(new

OnClickListener()

{

@Override

public

void

onClick(View

v)

{

recorder();

}

});

buttonStop.setOnClickListener(new

OnClickListener()

{

@Override

public

void

onClick(View

v)

{

recorder.stop();

recorder.reset();

recorder.release();

recorder=null;

}

});

}public

void

recorder()

{try

{

myRecAudioFile

=

File.createTempFile("video",

".3gp",dir);//创建临时文件recorder.setPreviewDisplay(mSurfaceHolder.getSurface());//预览recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);//视频源recorder.setAudioSource(MediaRecorder.AudioSource.MIC);

//录音源为麦克风recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);//输出格式为3gprecorder.setVideoSize(800,

480);//视频尺寸recorder.setVideoFrameRate(15);//视频帧频率recorder.setVideoEncoder(MediaRecorder.VideoEncoder.H263);//视频编码recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);//音频编码recorder.setMaxDuration(10000);//最大期限recorder.setOutputFile(myRecAudioFile.getAbsolutePath());//保存路径recorder.prepare();

recorder.start();

}

catch

(IOException

e)

{

e.printStackTrace();

}

}

}布局代码：

<?xml

version="1.0"

encoding="utf-8"?>

<LinearLayout

xmlns:android="/apk/res/android"

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent">

<SurfaceView

android:id="@+id/videoView"

android:visibility="visible"

android:layout_width="320px"

android:layout_height="240px">

</SurfaceView>

<RelativeLayout

android:layout_width="fill_parent"

android:layout_height="wrap_content">

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="录制"

android:id="@+id/start"/>

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_toRightOf="@id/start"

android:text="停止"

android:id="@+id/stop"/>

</RelativeLayout>

</LinearLayout>AndroidManifest.xml:

<!--

授予该程序录制声音的权限

-->

<uses-permission

android:name="android.permission.RECORD_AUDIO"/>

<!--

授予该程序使用摄像头的权限

-->

<uses-permission

android:name="android.permission.CAMERA"/>

<