android录制和播放视频

来源：互联网发布：云计算开发工程师面试编辑：程序博客网时间：2024/04/29 23:31

java代码：

package com.example.shipinlz;

import java.io.File;
import java.io.IOException;
import java.util.ResourceBundle.Control;

import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.media.RemoteControlClient.MetadataEditor;
import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.content.Context;
import android.content.DialogInterface;
import android.graphics.Camera;
import android.view.Menu;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.MediaController.MediaPlayerControl;
import android.widget.MediaController;
import android.widget.Toast;
import android.widget.VideoView;

public class MainActivity extends Activity implements OnClickListener{

   private Button starts,stops,plays;
   //显示视频预览的控件
   private SurfaceView surfaceview;

   private MediaRecorder mediarecoder;
   //视频文件
   private File videofiles;
   private boolean isRecording=false;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);
        starts=(Button)findViewById(R.id.starts);
        plays=(Button)findViewById(R.id.plays);
        stops=(Button)findViewById(R.id.stops);
        surfaceview=(SurfaceView)findViewById(R.id.shipin);
        stops.setEnabled(false);
        starts.setOnClickListener(this);
        stops.setOnClickListener(this);
        plays.setOnClickListener(this);
        //设置surfaceView不需要自己维护缓冲区
        surfaceview.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        //设置分辨率
        surfaceview.getHolder().setFixedSize(320, 280);
        //设置组件不会让屏幕自动关闭
        surfaceview.getHolder().setKeepScreenOn(true);
   }
   @Override
   public void onClick(View view) {
       // TODO Auto-generated method stub
       switch (view.getId()) {
       //单击录制按钮
       case R.id.starts:

           if(!Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)){
               Toast.makeText(this, "请插入能存卡", 0).show();
               return;
           }
           //创建录制视频的文件夹
           String path=Environment.getExternalStorageDirectory()+"/video";
           File file=new File(path);
           if(!file.exists()){
               file.mkdirs();
           }
           //录制视频的视频文件
           videofiles=new File(file.getPath()+"/shipin.mp4");
           //创建MediaRecorder对象
           mediarecoder=new MediaRecorder();
           mediarecoder.reset();
           //设置从麦克风采集声音
           mediarecoder.setAudioSource(MediaRecorder.AudioSource.MIC);
           //设置从摄像头采集图像
           mediarecoder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
           //设置视频文件的输出格式（必须设置在编码格式之前）
           mediarecoder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
           //设置音频编码格式
           mediarecoder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
           //设置图像编码格式
           mediarecoder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);

       //   mediarecoder.setVideoSize(320,320);
       //设置每秒4帧
       //   mediarecoder.setVideoFrameRate(4);
           //输出视频文件
           mediarecoder.setOutputFile(videofiles.getAbsolutePath());
           //指定surfaceview预览视频
           mediarecoder.setPreviewDisplay(surfaceview.getHolder().getSurface());
           try {

               mediarecoder.prepare();
               //开始录制
               mediarecoder.start();
               starts.setEnabled(false);
               stops.setEnabled(true);
               isRecording=true;
           } catch (IllegalStateException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
           } catch (Exception e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
           }


           break;

       case R.id.stops:
           if(isRecording){
               mediarecoder.stop();
               //释放资源
               mediarecoder.release();
               mediarecoder=null;
               starts.setEnabled(true);
               stops.setEnabled(false);
           }
           break;
       case R.id.plays:
       MediaPlayer mediaplayer=new MediaPlayer();
       mediaplayer.reset();
       mediaplayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
           try {
               mediaplayer.setDataSource(videofiles.getAbsolutePath());
               mediaplayer.setDisplay(surfaceview.getHolder());
               mediaplayer.prepare();
               mediaplayer.start();
           } catch (IllegalArgumentException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
           } catch (SecurityException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
           } catch (IllegalStateException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
           } catch (IOException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
           }

           break;
       }

   }

}

布局文件：

<LinearLayout 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:orientation="vertical"
        >

<LinearLayout
    android:orientation="horizontal"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    >
    <Button
        android:id="@+id/starts"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="开始录制"
        />
    <Button
        android:id="@+id/stops"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="停止录制"
        />
    <Button
        android:id="@+id/plays"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="播放视频"
        />
</LinearLayout>

    <SurfaceView
    android:id="@+id/shipin"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"

    />

</LinearLayout>

权限设置：

<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"/>

不知道为什么录制的图像是倒着的，如果有知道的指点一下

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