android 设置录制视频的时长与大小限制，超时、超大小时自动停止

项目中要用到录制视频，需要对视频的大小、录制时长做限制。所以开发了此demo。

1、原理很简单，对于超时控制：做个定时器，到时间自动停止。

2、对于文件大小控制：还是使用定时器，每个一定时间检测文件大小，超过设置大小自动停止。

本demo时长、文件大小设置使用的是SharedPreferences

 

package com.lbl;import java.io.File;import java.io.IOException;import java.util.List;import java.util.Timer;import java.util.TimerTask;import android.app.Activity;import android.app.AlertDialog;import android.content.DialogInterface;import android.content.DialogInterface.OnShowListener;import android.content.SharedPreferences;import android.content.SharedPreferences.Editor;import android.hardware.Camera;import android.hardware.Camera.Parameters;import android.hardware.Camera.Size;import android.media.MediaRecorder;import android.media.MediaRecorder.OnInfoListener;import android.os.Bundle;import android.os.Environment;import android.os.Handler;import android.os.Message;import android.view.SurfaceView;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.LinearLayout;import android.widget.SeekBar;import android.widget.SeekBar.OnSeekBarChangeListener;import android.widget.TextView;import android.widget.Toast;import com.example.myandroiddemo.R;public class RecordVideo extends Activity{// 程序中的两个按钮private Button record , stop;TextView currentTimeLengthTextView, currentFileSizeTextView;// 系统的视频文件private File videoFile ;private MediaRecorder mRecorder;// 显示视频预览的SurfaceView    SurfaceView sView;    // 记录是否正在进行录制    private boolean isRecording = false;    private Handler handler;        //控制时长seekBar    private SeekBar timeLengthSeekBar;    //控制文件大小seekBar    private SeekBar fileSizeSeekBar;        SharedPreferences sharedPreferences;    private Camera camera;            //控制时长定时器    private Timer timer_timeLength;    //控制文件大小定时器    private Timer timer_fileSize;    @Overridepublic void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.media_recorder);record = (Button) findViewById(R.id.record);stop = (Button) findViewById(R.id.stop);// 让stop按钮不可用。stop.setEnabled(false);// 为两个按钮的单击事件绑定监听器record.setOnClickListener(new OnButtonClick());stop.setOnClickListener(new OnButtonClick());// 获取程序界面中的SurfaceViewsView = (SurfaceView) this.findViewById(R.id.sView);/** * 出现这些问题基本上都是以下两个方法参数导致的，每个手机的分辨率和预览大小支持都不一样，设置错误就会报错。 *///        sView.getHolder().setFixedSize(320, 280);        // 设置该组件让屏幕不会自动关闭        sView.getHolder().setKeepScreenOn(true);                sharedPreferences = getSharedPreferences("settings", MODE_PRIVATE);                handler = new Handler(){        @Override        public void handleMessage(Message msg) {        if(msg.what == 0x123){        stop();        Toast.makeText(RecordVideo.this, "录制视频由于已超过最长时间，自动停止！", 200).show();        }else if(msg.what == 0x124){        stop();        Toast.makeText(RecordVideo.this, "录制视频由于已超过设置的最大文件大小，自动停止！", 200).show();        }        }        };}        class OnButtonClick implements OnClickListener{@Overridepublic void onClick(View v) {switch (v.getId()){// 单击录制按钮case R.id.record:if (!Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)){Toast.makeText(RecordVideo.this, "SD卡不存在，请插入SD卡！", Toast.LENGTH_SHORT).show();return;}init();start();//启动停止录制的定时器timer_timeLength = new Timer();System.out.println();System.out.println(sharedPreferences.getInt("maxTimeLength", 0) * 1000);timer_timeLength.schedule(new EndTimerThread(), sharedPreferences.getInt("maxTimeLength", 0) * 1000);//每个1秒输出视频大小//timer_fileSize = new Timer();//timer_fileSize.schedule(new CheckFileSizeThread(), new Date(), 500);break;// 单击停止按钮case R.id.stop:// 如果正在进行录制stop();break;}}        }    class OnSeekBarChange implements OnSeekBarChangeListener{@Overridepublic void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {if(seekBar.getId() == R.id.timeLengthSeekBar){currentTimeLengthTextView.setText("" + progress);}else{currentFileSizeTextView.setText("" + progress);}}@Overridepublic void onStartTrackingTouch(SeekBar seekBar) {}@Overridepublic void onStopTrackingTouch(SeekBar seekBar) {}    }/** * 初始化MediaRecoder * 参数设置顺序很重要，否则出错 * @throws IOException  */private void init(){// 创建保存录制视频的视频文件try {videoFile = new File(Environment.getExternalStorageDirectory().getCanonicalFile() + "/myvideo.mp4");} catch (IOException e) {e.printStackTrace();}// 创建MediaPlayer对象mRecorder = new MediaRecorder();mRecorder.reset();camera = Camera.open();camera.setDisplayOrientation(90);        Parameters parameters = camera.getParameters();//        List<Size> supportedPictureSizes = parameters.getSupportedPictureSizes();//        System.out.println("supportedPictureSizes================");//        for (Size size : supportedPictureSizes) {//System.out.println( "width: " + size.width + ";height:" + size.height);//}//        List<Size> supportedPreviewSizes = parameters.getSupportedPreviewSizes();//        System.out.println("supportedPreviewSizes================");//        for (Size size : supportedPreviewSizes) {//System.out.println( "width: " + size.width + ";height:" + size.height);//}//        List<Size> supportedVideoSizes = parameters.getSupportedVideoSizes();//        System.out.println("supportedVideoSizes================");//        for (Size size : supportedVideoSizes) {//System.out.println( "width: " + size.width + ";height:" + size.height);//}                        camera.unlock();        mRecorder.setCamera(camera);        // 设置从麦克风采集声音mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);// 设置从摄像头采集图像mRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);// 设置视频文件的输出格式// 必须在设置声音编码格式、图像编码格式之前设置mRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);//构造CamcorderProfile，使用高质量视频录制//CamcorderProfile camcorderProfile = CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH);//mRecorder.setProfile(camcorderProfile);// 设置声音编码的格式mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);// 设置图像编码的格式mRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);/** *设置视频录制的分辨率。必须放在设置编码和格式的后面，否则报错 *且这里的分辨率必须是该camera支持的 */        List<Size> supportedVideoSizes = parameters.getSupportedVideoSizes();        long maxFileSize = Long.parseLong(200 * 1024 + "");//如果获取不到视频分辨率信息则默认设置个100k                if(null != supportedVideoSizes && supportedVideoSizes.size() > 0){        mRecorder.setVideoSize(supportedVideoSizes.get(0).width, supportedVideoSizes.get(0).height);        maxFileSize = Long.parseLong(sharedPreferences.getInt("maxFileSize", 0) * 1024 * 1024 + "");        }else{        Toast.makeText(RecordVideo.this, "无法获取视频分辨率信息，此处默认最大200K。", 200).show();        }        // 每秒 4帧。。设置录制的视频帧率。必须放在设置编码和格式的后面，否则报错mRecorder.setVideoFrameRate(15);System.out.println("maxFileSize:"+maxFileSize);mRecorder.setMaxFileSize(maxFileSize);mRecorder.setOnInfoListener(new OnInfoListener() {@Overridepublic void onInfo(MediaRecorder mr, int what, int extra) {if(what == MediaRecorder.MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED){stop();        Toast.makeText(RecordVideo.this, "录制视频由于已超过设置的最大文件大小，自动停止！", 200).show();}}});mRecorder.setOutputFile(videoFile.getAbsolutePath());// 指定使用SurfaceView来预览视频mRecorder.setPreviewDisplay(sView.getHolder().getSurface());}/** * 开始录制视频 * @throws IOException  * @throws IllegalStateException  */private void start(){if(!isRecording){try {mRecorder.prepare();} catch (IllegalStateException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}// 开始录制mRecorder.start();// 让record按钮不可用。record.setEnabled(false);// 让stop按钮可用。stop.setEnabled(true);isRecording = true;}else{Toast.makeText(RecordVideo.this, "您正在录制，请先停止录制视频！", 200).show();}}/** * 停止录制视频 */private void stop(){if (isRecording){// 停止录制mRecorder.stop();// 释放资源mRecorder.release();mRecorder = null;camera.stopPreview();camera.release();camera = null;// 让record按钮可用。record.setEnabled(true);// 让stop按钮不可用。stop.setEnabled(false);isRecording = false;}else{//Toast.makeText(RecordVideo.this, "对不起，您还没有开始录制视频！", 200).show();}if(null != timer_timeLength){timer_timeLength.cancel();}if(null != timer_fileSize){timer_fileSize.cancel();}}/** * 停止录像定时器 */ class EndTimerThread extends TimerTask {@Override  public void run() {  handler.sendEmptyMessage(0x123);this.cancel(); } }///**// * 检测文件大小，超过设置的最大值时停止录制// */ //class CheckFileSizeThread extends TimerTask {//@Override  //public void run() {  //System.out.println("videoFile.length(): "+videoFile.length() + "; sharedPreferences.maxFileSize: " + sharedPreferences.getInt("maxFileSize", 0));//System.out.println(videoFile.length()/1024/1024);////if(videoFile.length()/1024/1024 >= sharedPreferences.getInt("maxFileSize", 0)){//handler.sendEmptyMessage(0x124);//this.cancel();//}//} //}/** * 设置按钮单机事件 * @param v */public void setting(View v){LinearLayout linearLayout = (LinearLayout)getLayoutInflater().inflate(R.layout.setting, null);AlertDialog alertDialog = new AlertDialog.Builder(RecordVideo.this).setTitle("设置").setIcon(R.drawable.ic_launcher).setView(linearLayout).setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {//保存数据到SharedPreferences中Editor editor = sharedPreferences.edit();editor.putInt("maxTimeLength", timeLengthSeekBar.getProgress());editor.putInt("maxFileSize", fileSizeSeekBar.getProgress());//提交数据editor.commit();}}).create();//弹出设置对话框时初始化保存的试着信息alertDialog.setOnShowListener(new OnShowListener() {@Overridepublic void onShow(DialogInterface dialog) {currentTimeLengthTextView.setText(sharedPreferences.getInt("maxTimeLength", 0) + "");currentFileSizeTextView.setText(sharedPreferences.getInt("maxFileSize", 0) + "");timeLengthSeekBar.setProgress(sharedPreferences.getInt("maxTimeLength", 0));fileSizeSeekBar.setProgress(sharedPreferences.getInt("maxFileSize", 0));}});alertDialog.show();//获取设置界面的元素timeLengthSeekBar = (SeekBar)linearLayout.findViewById(R.id.timeLengthSeekBar);fileSizeSeekBar = (SeekBar)linearLayout.findViewById(R.id.fileSizeSeekBar);currentTimeLengthTextView = (TextView) linearLayout.findViewById(R.id.currentTimeLength);currentFileSizeTextView = (TextView) linearLayout.findViewById(R.id.currentFileSize);//给seekBar添加监听器timeLengthSeekBar.setOnSeekBarChangeListener(new OnSeekBarChange());fileSizeSeekBar.setOnSeekBarChangeListener(new OnSeekBarChange());}}

 

media_recorder.xml文件：

 

<?xml version="1.0" encoding="utf-8"?><RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical"android:layout_width="match_parent"android:layout_height="match_parent"><!-- 显示视频预览的SurfaceView --><SurfaceViewandroid:id="@+id/sView"android:layout_width="match_parent"android:layout_height="match_parent" /><LinearLayoutandroid:orientation="horizontal"android:layout_width="wrap_content"android:layout_height="wrap_content"android:gravity="center_horizontal"android:layout_alignParentBottom="true"android:layout_centerHorizontal="true"><Button     android:id="@+id/settintg"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="设置"    android:onClick="setting"    /><Buttonandroid:id="@+id/record"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="开始"/><Buttonandroid:id="@+id/stop"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="结束"/></LinearLayout></RelativeLayout>

 

AndroidManifest.xml文件中别忘了加权限哦：

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