需要权限

<!-- 调用摄像头权限 -->
<uses-permission android:name="android.permission.RECORD_AUDIO" />
 <!-- 录制视频/音频权限 -->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 <!-- sd卡读写权限 -->
 <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
 <!-- 挂载sd卡使用现有应用程序的Android摄像头应用程序 -->

自定义代码

package com.example.record_video_text;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import android.app.Activity;
import android.hardware.Camera;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SurfaceView;
import android.view.View;

public class MainActivity extends Activity {
    SurfaceView SurfaceView_text;
    private MediaRecorder mediaRecorder;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        SurfaceView_text = (SurfaceView) findViewById(R.id.SurfaceView_text);
    }

    public void Record(View v) {
        // 1获取MediaRecorder对象
        mediaRecorder = new MediaRecorder();
        Camera open = Camera.open();
        open.setDisplayOrientation(90);
        open.unlock();//解锁
        mediaRecorder.setCamera(open);
        // 2重复
        mediaRecorder.reset();
        // 3设置音视频资源的来源
        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);//音频
        mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);//视频
        // 4设置录制视频的格式
        mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
        // 5配置
        mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);//设置音频的编码
        mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);//设置视频的编码格式
        // 6设置储存到手机文件
        File file = new File(Environment.getExternalStorageDirectory().getPath()+"/shiping");
        //创建目录
        if(!file.exists()){
            file.mkdirs();  
        }
        File file2 = new File(file.getPath()+"/"+System.currentTimeMillis()+".3gp");
        
        try {
            file2.createNewFile();
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        
        mediaRecorder.setOutputFile(file2.getPath());
        mediaRecorder.setVideoFrameRate(20);//设置每秒播放几帧
        // 7设置预览
        mediaRecorder.setPreviewDisplay(SurfaceView_text.getHolder().getSurface());
        // 8准备播放
        try {
            mediaRecorder.prepare();
            mediaRecorder.start();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    public void stop(View v) {
        if(mediaRecorder!=null){
            mediaRecorder.stop();
            mediaRecorder.release();
        }
    }
}

2系统录像

    Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
        file = new File(Environment.getExternalStorageDirectory(),
                System.currentTimeMillis() + ".3gp");
        intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
        startActivityForResult(intent, 110);

返回

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // TODO Auto-generated method stub
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == 110) {
            SurfaceView_text.setVideoPath(file.getPath());
            SurfaceView_text.setMediaController(new MediaController(this));
            SurfaceView_text.start();
        }

    }

设置视频清晰度
mediaRecorder.setVideoSize(640, 480);// 设置分辨率：
mediaRecorder.setVideoEncodingBitRate(510241024);// 设置帧频率，然后就清晰了