Android学习笔记_27_多媒体之视频刻录

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一、配置文件：

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.videorecord"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="17" />    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name="com.example.videorecord.MainActivity"            android:label="@string/app_name" android:screenOrientation="landscape" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application><uses-permission android:name="android.permission.RECORD_AUDIO"/> <uses-permission android:name="android.permission.CAMERA"/><uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/></manifest>

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　　布局文件：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity" >    <SurfaceView        android:id="@+id/surfaceView"        android:layout_width="match_parent"        android:layout_height="match_parent" />    <RelativeLayout        android:id="@+id/buttonlayout"        android:layout_width="match_parent"        android:layout_height="match_parent"         >        <Button            android:id="@+id/videostop"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignParentBottom="true"            android:layout_alignParentRight="true"            android:layout_marginRight="5dp"            android:layout_toLeftOf="@+id/videorecord"            android:onClick="record"            android:enabled="false"            android:text="@string/stop" />        <Button            android:id="@+id/videorecord"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignParentBottom="true"            android:layout_alignParentRight="true"            android:layout_marginRight="59dp"            android:onClick="record"            android:text="@string/record" />    </RelativeLayout></RelativeLayout>

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二、代码实现：

package com.example.videorecord;import android.app.Activity;import android.media.MediaRecorder;import android.os.Bundle;import android.view.Menu;import android.view.MotionEvent;import android.view.SurfaceHolder;import android.view.SurfaceView;import android.view.View;import android.view.ViewGroup;import android.view.Window;import android.view.WindowManager;import android.widget.Button;/** * 视频采集刻录 * @author Administrator * */public class MainActivity extends Activity {    private View layout;    private SurfaceView surfaceView;    private Button recordButton;    private Button stopButton;    private MediaRecorder recorder;    private boolean record=false;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        //设置窗口没有标题        requestWindowFeature(Window.FEATURE_NO_TITLE);        //全屏显示        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,                 WindowManager.LayoutParams.FLAG_FULLSCREEN);                setContentView(R.layout.activity_main);        layout= this.findViewById(R.id.buttonlayout);        recordButton= (Button) this.findViewById(R.id.videorecord);        stopButton= (Button) this.findViewById(R.id.videostop);        //确定surfaceView什么时候被时间        surfaceView = (SurfaceView) this.findViewById(R.id.surfaceView);        /*下面设置Surface不维护自己的缓冲区，而是等待屏幕的渲染引擎将内容推送到用户面前*/        surfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);        surfaceView.getHolder().setFixedSize(176, 144);    //设置分辨率        surfaceView.getHolder().setKeepScreenOn(true);//设置高亮            }    public void record(View v){        try {            switch (v.getId()) {            case R.id.videorecord:                recorder = new MediaRecorder();                recorder.reset();                                    recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); //从照相机采集视频                    recorder.setAudioSource(MediaRecorder.AudioSource.MIC); //麦克风                            recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);//输出格式3gp                recorder.setVideoSize(320, 240);//视频大小                recorder.setVideoFrameRate(3); //每秒3帧，每秒从摄像头捕获多少画面                        recorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264); //设置视频编码方式                    recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);//设置声音编码                        recorder.setOutputFile("/storage/sdcard0/360/"+System.currentTimeMillis()+".3gp");//文件输出位置                    //设置预览显示                recorder.setPreviewDisplay(surfaceView.getHolder().getSurface());                recorder.prepare();//预期准备                recorder.start();//开始刻录                record = true;                recordButton.setEnabled(false);                stopButton.setEnabled(true);                break;            case R.id.videostop:                if(record){                    recorder.stop();//停止刻录                    record = false;                    recorder.release();                    recorder=null;                }                            recordButton.setEnabled(true);                stopButton.setEnabled(false);                break;            }        } catch (Exception e) {            e.printStackTrace();        }    }        //触摸事件    public boolean onTouchEvent(MotionEvent event) {        //手指按下屏幕        if(event.getAction()==MotionEvent.ACTION_DOWN){            layout.setVisibility(ViewGroup.VISIBLE);//显示布局            return true;        }        return super.onTouchEvent(event);    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        getMenuInflater().inflate(R.menu.main, menu);        return true;    }}

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