android录制视屏（预览，倒计时）

　　android用mediarecord录制视屏，可以设置视屏格式，大小，还有拍摄前预览，倒计时功能要自己用hander做。

　　1,CameraPreview.java

//预览class

public class CameraPreview extends SurfaceView implements Callback { 

private static final String TAG = "TAG-CameraPreview"; 

private SurfaceHolder mHolder; 
private Camera mCamera; 

public CameraPreview(Context context, Camera camera) { 
super(context); 
mCamera = camera; 

// 安装一个SurfaceHolder.Callback 
mHolder = getHolder(); 
mHolder.addCallback(this); 

// 针对低于3.0的Android 
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 
} 

public void surfaceCreated(SurfaceHolder holder) { 
// 把预览画面的位置通知摄像头 
try { 
mCamera.setPreviewDisplay(holder); 
mCamera.startPreview(); 
} catch (IOException e) { 
Log.d(TAG, "Error setting camera preview: " + e.getMessage()); 
} 
} 

public void surfaceDestroyed(SurfaceHolder holder) { 
// TODO 
} 

public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { 

if (mHolder.getSurface() == null){ 
// 预览surface不存在 
return; 
} 

// 更改时停止预览 
try { 
mCamera.stopPreview(); 
} catch (Exception e){ 

} 

// 在此进行缩放、旋转和重新组织格式 
// 以新的设置启动预览 
try { 
mCamera.setPreviewDisplay(mHolder); 
mCamera.startPreview(); 
} catch (Exception e){ 
Log.d(TAG, "Error starting camera preview: " + e.getMessage()); 
} 
} 

}

　　2,RecordMp4.java

public class RecordMp4 extends Activity implements SurfaceHolder.Callback {

private Button mStopButton;

// private SurfaceView mSurfaceView;

private SurfaceHolder mSurfaceHolder;

private MediaRecorder mMediaRecorder;

private String path, pid, uid;

private CheckBox playOrStop;

private Camera mCamera;

private CameraPreview mSurfaceView;

private TextView recor_mp4_left_time;

private int second = 20;

Handler handler;

 

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

// 去掉标题栏

requestWindowFeature(Window.FEATURE_NO_TITLE);

// 设置全屏

getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,

WindowManager.LayoutParams.FLAG_FULLSCREEN);

// 设置横屏显示

setContentView(R.layout.record_mp4);

handler = new Handler();

pid = getIntent().getStringExtra("pid");

uid = getIntent().getStringExtra("uid");

 

init();

}

 

private void init() {

playOrStop = (CheckBox) findViewById(R.id.etsound_playstop);

playOrStop.setOnClickListener(new ClickListenerImpl());

recor_mp4_left_time = (TextView) findViewById(R.id.recor_mp4_left_time);

 

mCamera = getCameraInstance();

// 创建Preview view并将其设为activity中的内容

mSurfaceView = new CameraPreview(this, mCamera);

FrameLayout preview = (FrameLayout) findViewById(R.id.camera_preview);

preview.addView(mSurfaceView);

mSurfaceHolder = mSurfaceView.getHolder();

mSurfaceHolder.addCallback(this);

mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

}

 

Runnable runnable = new Runnable() {

@Override

public void run() {

second--;

if (second <= 0) {

handler.removeCallbacks(this);

} else {

recor_mp4_left_time.setText("还剩" + second + "s");

handler.postDelayed(this, 1000);

}

}

};

 

private Camera getCameraInstance() {

Camera c = null;

 

try {

// 获取Camera实例

c = Camera.open();

c.setDisplayOrientation(90);

} catch (Exception e) {

// 摄像头不可用（正被占用或不存在）

}

// 不可用则返回null

return c;

}

 

@SuppressLint("NewApi")

private void initMediaRecorder() {

// next codes is right for 2.3 and 4.0

mMediaRecorder = new MediaRecorder();

// mCamera = Camera.open();

// mCamera.setDisplayOrientation(90);

 

mCamera.unlock();

mMediaRecorder.setCamera(mCamera);

// 设置视频源

mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);

mMediaRecorder.setOrientationHint(90);// 视频旋转90度

// 设置音频源

mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);

// 设置文件输出格式

mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);

// 设置视频编码方式

mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);

// 设置音频编码方式

mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);

// 设置视频高和宽,注意文档的说明:

// Must be called after setVideoSource().

// Call this after setOutFormat() but before prepare().

// 设置录制的视频帧率,注意文档的说明:

// Must be called after setVideoSource().

// Call this after setOutFormat() but before prepare().

mMediaRecorder.setVideoFrameRate(16);

// 设置预览画面

mMediaRecorder.setPreviewDisplay(mSurfaceHolder.getSurface());

// 设置输出路径

path =  this.getFilesDir().getAbsolutePath()+File.separator+System.currentTimeMillis()+".mp4";

 

mMediaRecorder.setOutputFile(path);

mMediaRecorder.setVideoSize(640, 480);

// 设置视频的最大持续时间

mMediaRecorder.setMaxDuration(20000);

// 为MediaRecorder设置监听

mMediaRecorder.setOnInfoListener(new OnInfoListener() {

public void onInfo(MediaRecorder mr, int what, int extra) {

if (what == MediaRecorder.MEDIA_RECORDER_INFO_MAX_DURATION_REACHED) {

TCommUtil.showToast(RecordMp4.this, "已经达到最长录制时间", true);

System.out.println("已经达到最长录制时间");

if (mMediaRecorder != null) {

mMediaRecorder.stop();

mMediaRecorder.release();

mMediaRecorder = null;

}

}

}

});

}

 

private class ClickListenerImpl implements OnClickListener {

public void onClick(View v) {

CheckBox checkBox = (CheckBox) v;

if (checkBox.getId() == R.id.etsound_playstop) {

if (mMediaRecorder == null) {

try {

initMediaRecorder();

mMediaRecorder.prepare();

mMediaRecorder.start();

handler.postDelayed(runnable, 0);

} catch (IllegalStateException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

} else {

if (mMediaRecorder != null) {

mMediaRecorder.stop();

releaseMediaRecorder();

mCamera.lock();

}

}

}

}

}

 

@Override

protected void onPause() {

super.onPause();

handler.removeCallbacks(runnable);

// 如果正在使用MediaRecorder，首先需要释放它。

releaseMediaRecorder();

// 在暂停事件中立即释放摄像头

releaseCamera();

}

 

private void releaseMediaRecorder() {

if (mMediaRecorder != null) {

// 清除recorder配置

handler.removeCallbacks(runnable);

mMediaRecorder.reset();

// 释放recorder对象

mMediaRecorder.release();

mMediaRecorder = null;

// 为后续使用锁定摄像头

mCamera.lock();

}

}

 

private void releaseCamera() {

if (mCamera != null) {

// 为其它应用释放摄像头

mCamera.release();

mCamera = null;

}

}

 

// SurfaceHolder.Callback接口

public void surfaceCreated(SurfaceHolder holder) {

try {

 

} catch (IllegalStateException e) {

e.printStackTrace();

}

}

//  在 surfaceChanged以后，才在 initMediaRecorder()方法里 MediaRecorder 变量设置参数，不然 会在

//mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); 出报错。

public void surfaceChanged(SurfaceHolder holder, int format, int width,

int height) {

System.out.println("SurfaceView---->Changed");

}

 

public void surfaceDestroyed(SurfaceHolder holder) {

System.out.println("SurfaceView---->Destroyed");

if (mMediaRecorder != null) {

mMediaRecorder.stop();

mMediaRecorder.release();

mMediaRecorder = null;

}

}

}

　　3,record_mp4.xml

<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:background="@color/solid_white" >

 

    <FrameLayout

        android:id="@+id/camera_preview"

        android:layout_width="match_parent"

        android:layout_height="match_parent" >

    </FrameLayout>

 

    <RelativeLayout

        android:id="@+id/etsound_rlcontent"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:layout_alignParentBottom="true"

        android:background="@color/transparent"

        android:clickable="true"

        android:focusable="true"

        android:focusableInTouchMode="true"

        android:visibility="visible" >

 

         <TextView

             android:id="@+id/recor_mp4_left_time"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_alignParentTop="true"

            android:layout_centerHorizontal="true"

            android:layout_marginTop="10dp"

            android:textColor="@color/titlebar_bg"

            android:text="20s"

            android:textSize="25sp" />

         

        <FrameLayout

            android:id="@+id/etsound_playstop_fl"

            android:layout_width="100dp"

            android:layout_height="100dp"

            android:layout_alignParentBottom="true"

            android:layout_centerHorizontal="true"

            android:background="@drawable/round_video" >

 

            <CheckBox

                android:id="@+id/etsound_playstop"

                android:layout_width="wrap_content"

                android:layout_height="wrap_content"

                android:layout_gravity="center"

                android:background="@drawable/play_video_stop_selector"

                android:button="@null"

                android:padding="10dp" />

        </FrameLayout>

 

       

    </RelativeLayout>

 

</RelativeLayout>

posted @ 2014-07-07 18:01 lsc183 阅读(2184) 评论(0) 收藏举报

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lsc183

android录制视屏（预览，倒计时）

android用mediarecord录制视屏，可以设置视屏格式，大小，还有拍摄前预览，倒计时功能要自己用hander做。

1,CameraPreview.java

2,RecordMp4.java

3,record_mp4.xml

公告

　　android用mediarecord录制视屏，可以设置视屏格式，大小，还有拍摄前预览，倒计时功能要自己用hander做。

　　1,CameraPreview.java

　　2,RecordMp4.java

　　3,record_mp4.xml