Android学习笔记_27_多媒体之视频刻录

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>

　　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>

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;
    }

}