Android 中使用MediaRecorder進行錄像詳解（視頻錄製）

在這裏給出本身的一個測試DEMO，裏面註釋很詳細。簡單的視頻錄製功能.

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：一個簡單的錄製視頻例子<BR>
 * PS：實現基本的錄製保存文件 <BR>
 * 
 * @version 1.00 2011/09/21
 * @author CODYY)peijiangping
 */
public class TestBasicVideo extends Activity implements SurfaceHolder.Callback {
    private Button start;// 開始錄製按鈕
    private Button stop;// 中止錄製按鈕
    private MediaRecorder mediarecorder;// 錄製視頻的類
    private SurfaceView surfaceview;// 顯示視頻的控件
    // 用來顯示視頻的一個接口，我靠不用還不行，也就是說用mediarecorder錄製視頻還得給個界面看
    // 想偷偷錄視頻的同窗能夠考慮別的辦法。。嗯須要實現這個接口的Callback接口
    private SurfaceHolder surfaceHolder;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);// 去掉標題欄
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);// 設置全屏
        // 設置橫屏顯示
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
        // 選擇支持半透明模式,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加入回調接口
        // setType必須設置，要不出錯.
        holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
    }

    class TestVideoListener implements OnClickListener {

        @Override
        public void onClick(View v) {
            if (v == start) {
                mediarecorder = new MediaRecorder();// 建立mediarecorder對象
                // 設置錄製視頻源爲Camera(相機)
                mediarecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
                // 設置錄製完成後視頻的封裝格式THREE_GPP爲3gp.MPEG_4爲mp4
                mediarecorder
                        .setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
                // 設置錄製的視頻編碼h263 h264
                mediarecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
                // 設置視頻錄製的分辨率。必須放在設置編碼和格式的後面，不然報錯
                mediarecorder.setVideoSize(176, 144);
                // 設置錄製的視頻幀率。必須放在設置編碼和格式的後面，不然報錯
                mediarecorder.setVideoFrameRate(20);
                mediarecorder.setPreviewDisplay(surfaceHolder.getSurface());
                // 設置視頻文件輸出的路徑
                mediarecorder.setOutputFile("/sdcard/love.3gp");
                try {
                    // 準備錄製
                    mediarecorder.prepare();
                    // 開始錄製
                    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) {
                    // 中止錄製
                    mediarecorder.stop();
                    // 釋放資源
                    mediarecorder.release();
                    mediarecorder = null;
                }
            }

        }

    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width,
            int height) {
        // 將holder，這個holder爲開始在oncreat裏面取得的holder，將它賦給surfaceHolder
        surfaceHolder = holder;
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        // 將holder，這個holder爲開始在oncreat裏面取得的holder，將它賦給surfaceHolder
        surfaceHolder = holder;
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        // surfaceDestroyed的時候同時對象設置爲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>