Android视频录制小例子

转于：http://blog.csdn.net/ouyang_peng/article/details/12068331

 

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下面就看看该小例子的代码吧。

文件1.该应用的布局文件，res/layout/main.xml

 

<!-- 帧布局 -->
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent" android:layout_height="fill_parent">

    <!-- 用来展示画面 -->
    <SurfaceView android:id="@+id/surfaceView"
        android:layout_width="fill_parent" android:layout_height="fill_parent" />

    <!-- 相对布局,该界面默认不显示出来，当触摸屏幕时候显示出来 -->
    <RelativeLayout android:layout_width="fill_parent"
        android:layout_height="fill_parent" android:visibility="gone"
        android:id="@+id/buttonlayout">
        <!-- 刻录按钮 -->
        <Button android:layout_width="wrap_content"
            android:layout_height="wrap_content" android:layout_alignParentRight="true"
            android:layout_alignParentBottom="true" android:layout_marginRight="10dp"
            android:text="@string/recoderbutton" android:onClick="recoder"
            android:id="@+id/recoderbutton" />
        <!-- 停止按钮 -->
        <Button android:layout_width="wrap_content"
            android:layout_height="wrap_content" android:layout_toLeftOf="@id/recoderbutton"
            android:layout_alignTop="@id/recoderbutton" android:layout_marginRight="30dp"
            android:text="@string/stopbutton" android:onClick="stop"
            android:id="@+id/stopbutton"
            android:enabled="false"/>
    </RelativeLayout>
</FrameLayout>

文件2:布局文件所用到的资源文件，res/values/string.xml

 

 

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="hello">Hello World, RecoderActivity!</string>
    <string name="app_name">视频刻录小例子</string>
    <string name="recoderbutton">刻录</string>
    <string name="stopbutton">停止</string>
    <string name="noSDcard">检测到手机没有存储卡！请插入手机存储卡再开启本应用</string>
    <string name="maxDuration">已经达到最长录制时间</string>
</resources>

 文件3:该应用的主程序，RecoderActivity.java

 

 

package cn.oyp.recoder;

import java.io.File;

import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.media.MediaRecorder;
import android.media.MediaRecorder.OnInfoListener;
import android.os.Bundle;
import android.os.Environment;
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;
import android.widget.RelativeLayout;
import android.widget.Toast;

public class RecoderActivity extends Activity {
    // 用来显示图片
    private SurfaceView surfaceView;
    // 刻录和停止按钮布局
    private RelativeLayout buttonlayout;
    // 刻录按钮
    private Button recoderbutton;
    // 停止按钮
    private Button stopbutton;
    // 媒体刻录对象
    private MediaRecorder mediaRecorder;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // 窗口特效为无标题
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        // 设置窗口全屏
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        // 设定屏幕显示为横向
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
        setContentView(R.layout.main);

        buttonlayout = (RelativeLayout) this.findViewById(R.id.buttonlayout);
        recoderbutton = (Button) this.findViewById(R.id.recoderbutton);
        stopbutton = (Button) this.findViewById(R.id.stopbutton);

        surfaceView = (SurfaceView) this.findViewById(R.id.surfaceView);
        // 获取的画面直接输出到屏幕上
        surfaceView.getHolder()
                .setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        // 画面分辨率
        surfaceView.getHolder().setFixedSize(176, 144);
        // 保持屏幕高亮
        surfaceView.getHolder().setKeepScreenOn(true);
    }

    // 点击刻录按钮处理方法
    public void recoder(View v) {
        try {
            // 判断是否存在SD卡
            if (Environment.getExternalStorageState().equals(
                    Environment.MEDIA_MOUNTED)) {
                // 将刻录的视频保存到SD卡中
                File videoFile = new File(
                        Environment.getExternalStorageDirectory(),
                        System.currentTimeMillis() + ".3gp");
                mediaRecorder = new MediaRecorder();
                // 设置声音采集来源于麦克风
                mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
                // 设置视频采集来源于摄像头
                mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
                // 设置输出格式为3gp
                mediaRecorder
                        .setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
                // 设置视频尺寸
                mediaRecorder.setVideoSize(surfaceView.getWidth(),
                        surfaceView.getHeight());
                // 设置每秒钟捕捉画面个数为5帧
                mediaRecorder.setVideoFrameRate(5);
                // 设置声音编码
                mediaRecorder
                        .setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
                // 设置视频编码
                mediaRecorder.setAudioEncoder(MediaRecorder.VideoEncoder.H264);
                // 设置视频的最大持续时间
                mediaRecorder.setMaxDuration(10000);
                mediaRecorder.setOnInfoListener(new OnInfoListener() {
                    @Override
                    public void onInfo(MediaRecorder mr, int what, int extra) {
                        if (what == MediaRecorder.MEDIA_RECORDER_INFO_MAX_DURATION_REACHED) {
                            Toast.makeText(getApplicationContext(),
                                    R.string.maxDuration, Toast.LENGTH_LONG)
                                    .show();
                            if (mediaRecorder != null) {
                                mediaRecorder.stop();
                                mediaRecorder.release();
                                mediaRecorder = null;
                            }
                        }
                    }
                });
                // 设置刻录的视频保存路径
                mediaRecorder.setOutputFile(videoFile.getAbsolutePath());
                // 设置预览显示
                mediaRecorder.setPreviewDisplay(surfaceView.getHolder()
                        .getSurface());
                // 预期准备
                mediaRecorder.prepare();
                // 开始刻录
                mediaRecorder.start();
            } else {
                Toast.makeText(getApplicationContext(), R.string.noSDcard,
                        Toast.LENGTH_LONG).show();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        // 刻录按钮不可点击
        recoderbutton.setEnabled(false);
        // 停止按钮可点击
        stopbutton.setEnabled(true);
    }

    // 点击停止按钮处理方法
    public void stop(View v) {
        // 停止刻录,并释放资源
        if (mediaRecorder != null) {
            mediaRecorder.stop();
            mediaRecorder.release();
            mediaRecorder = null;
        }
        // 刻录按钮可点击
        recoderbutton.setEnabled(true);
        // 停止按钮不可点击
        stopbutton.setEnabled(false);
    }

    /** 当触摸屏幕的时候，将对焦和拍照按钮布局显示出来 */
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_DOWN) {
            buttonlayout.setVisibility(ViewGroup.VISIBLE);
            return true;
        }
        return super.onTouchEvent(event);
    }

}

文件4:该应用的描述文件 ，AndroidManifest.xml

 

 

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="cn.oyp.recoder" android:versionCode="1" android:versionName="1.0">
    <uses-sdk android:minSdkVersion="8" />

    <!-- 摄像头权限 -->
    <uses-permission android:name="android.permission.CAMERA" />
    <!-- 录制音频权限 -->
    <uses-permission android:name="android.permission.RECORD_AUDIO"/>
    <!-- 在SD卡中创建和删除文件权限 -->
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
    <!-- 往SD卡中写入数据的权限 -->
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />


    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".RecoderActivity" 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>
</manifest>