使用MediaRecorder+SurfaceView实现录像

实现录像的前提是必须获取的手机的摄像头，这里我只获取了后置摄像头
这些都需要早在清单文件中

 <!-- 添加使用摄像头的权限 -->
    <uses-permission android:name="android.permission.CAMERA" />

    <!-- 创建文件的权限 -->
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
    <!-- 写文件的权限 -->
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

    <!--视屏权限-->
    <uses-permission android:name="android.permission.RECORD_AUDIO"/>

activity_view_.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_view_"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.example.g150825_photoandting.ViewActivity">
    <SurfaceView
        android:layout_width="match_parent"
        android:layout_height="336dp"
        android:id="@+id/mian_sfv_id"
        android:layout_weight="0.93" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        >
        <Button
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="开始"
            android:onClick="start"
            />

        <Button
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="停止"
            android:onClick="stop"
            />

    </LinearLayout>
</LinearLayout>

ViewActivity.java

package com.example.g150825_photoandting;

import android.media.MediaRecorder;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.SurfaceView;
import android.view.View;

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

public class ViewActivity extends AppCompatActivity {

    private SurfaceView main_sfv_id;
    private MediaRecorder mediaRecorder;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_view_);
        main_sfv_id = (SurfaceView)findViewById(R.id.mian_sfv_id);
         //实例化媒体录制器
        mediaRecorder = new MediaRecorder();

    }

    public void start(View view){
        mediaRecorder.reset();
        //设置视频和音频的来源
        mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);

        //设置保存的格式
        mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);

        //设置编码格式
        mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H263);
        mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

        mediaRecorder.setVideoFrameRate(3);

        //设置保存的路径
        mediaRecorder.setOutputFile("mnt/sdcard/G150825_"+System.currentTimeMillis()+".mp4");
        Log.i("test",System.currentTimeMillis()+".mp4");

        //将画面展示到SurfaceView
        mediaRecorder.setPreviewDisplay(main_sfv_id.getHolder().getSurface());

        //准备
        try {
            mediaRecorder.prepare();

            mediaRecorder.start();

        } catch (IOException e) {
            e.printStackTrace();
        }


    }
    public void stop(View view){
        mediaRecorder.stop();
    }
}