1. 程式人生 > >Android 中使用MediaRecorder進行錄影詳解(視訊錄製)

Android 中使用MediaRecorder進行錄影詳解(視訊錄製)

在這裡給出自己的一個測試DEMO,裡面註釋很詳細。簡單的視訊錄製功能.

package com.demo;

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:一個簡單的錄製視訊例子<BR>

 * PS:實現基本的錄製儲存檔案 <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;// 停止錄製按鈕 private MediaRecorder mediarecorder;// 錄製視訊的類 private SurfaceView surfaceview;// 顯示視訊的控制元件 // 用來顯示視訊的一個介面,我靠不用還不行,也就是說用mediarecorder錄製視訊還得給個介面看 // 想偷偷錄視訊的同學可以考慮別的辦法。。嗯需要實現這個介面的Callback介面
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);// 設定全屏 // 設定橫屏顯示
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); // 選擇支援半透明模式,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加入回撥介面 // setType必須設定,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物件 // 設定錄製視訊源為Camera(相機) mediarecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); // 設定錄製完成後視訊的封裝格式THREE_GPP為3gp.MPEG_4為mp4 mediarecorder .setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); // 設定錄製的視訊編碼h263 h264 mediarecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264); // 設定視訊錄製的解析度。必須放在設定編碼和格式的後面,否則報錯 mediarecorder.setVideoSize(176, 144); // 設定錄製的視訊幀率。必須放在設定編碼和格式的後面,否則報錯 mediarecorder.setVideoFrameRate(20); mediarecorder.setPreviewDisplay(surfaceHolder.getSurface()); // 設定視訊檔案輸出的路徑 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) { // 停止錄製 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為開始在oncreat裡面取得的holder,將它賦給surfaceHolder surfaceHolder = holder; } @Override public void surfaceCreated(SurfaceHolder holder) { // 將holder,這個holder為開始在oncreat裡面取得的holder,將它賦給surfaceHolder surfaceHolder = holder; } @Override public void surfaceDestroyed(SurfaceHolder holder) { // surfaceDestroyed的時候同時物件設定為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.demo" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" /> <application android:icon="@drawable/ic_launcher" android:label="@string/app_name" > <activity android:name=".TestBasicVideo" > <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.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>