录像操作

recoder.set的时候 已经要注意顺序否则有可能会导致初始化失败  下面直接上代码了

AndroidManifest.xml

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

    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

    <uses-sdk android:minSdkVersion="4" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".DemoActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="start"
        android:text="开始录像" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="stop"
        android:text="停止录像" />
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="recodeBySystem"
        android:text="调用系统的录像机 录像" />
    <SurfaceView
        android:id="@+id/sv"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />

</LinearLayout>

Activity文件

package cn.itcast.videorecoder;

import java.io.File;
import java.io.IOException;

import android.app.Activity;
import android.content.Intent;
import android.media.MediaRecorder;
import android.media.MediaRecorder.AudioEncoder;
import android.media.MediaRecorder.AudioSource;
import android.media.MediaRecorder.OutputFormat;
import android.media.MediaRecorder.VideoEncoder;
import android.media.MediaRecorder.VideoSource;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Toast;

public class DemoActivity extends Activity {
    private MediaRecorder recoder;
    private SurfaceView sv;
    private SurfaceHolder holder;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        sv = (SurfaceView) findViewById(R.id.sv);
        holder = sv.getHolder();
        holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

    }

    public void start(View view) {
        try {
            recoder = new MediaRecorder();
            recoder.setAudioSource(AudioSource.MIC);
            recoder.setVideoSource(VideoSource.CAMERA);
            recoder.setOutputFormat(OutputFormat.THREE_GPP);
            recoder.setAudioEncoder(AudioEncoder.DEFAULT);
            recoder.setVideoEncoder(VideoEncoder.H264);
            recoder.setOutputFile("/sdcard/a.3gp");
            recoder.setVideoSize(640, 480);
            recoder.setVideoFrameRate(5);
            //指定预览界面
            recoder.setPreviewDisplay(holder.getSurface());
            recoder.prepare();
            recoder.start();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void stop(View view) {
        if (recoder != null) {
            recoder.stop();
            recoder.release();
            recoder = null;
        }
    }
    
    public void recodeBySystem(View  view){
      /*  <intent-filter>
        <action android:name="android.media.action.VIDEO_CAPTURE" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>*/
        Intent intent = new Intent();
        intent.setAction("android.media.action.VIDEO_CAPTURE");
        intent.addCategory("android.intent.category.DEFAULT");
//        Bundle extras = new Bundle();
        File file = new File("/sdcard/aaa"+System.currentTimeMillis()+".3gp");
//        extras.putParcelable(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
//        intent.putExtras(extras);
        intent.putExtra(MediaStore.EXTRA_OUTPUT,Uri.fromFile(file));
        startActivityForResult(intent, 0);
    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        Toast.makeText(this, "录制完成", 0).show();
    }
}

基础day07/videorecoder