Android 实现录像机功能

实现步骤：
<1>将视频动画显示到SurfaceView控件上
<2>使用MediaRecorder类进行视频的录制

布局文件
<?xml version="1.0" encoding="utf-8"?>
<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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    >

    <SurfaceView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/sv_main_surfaceview"
        />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

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

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


</RelativeLayout>

Activity：

package com.example.prcture;

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

public class MainActivity extends AppCompatActivity {

    private SurfaceView sv_main_surfaceview;
    private MediaRecorder mediaRecorder;

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

        mediaRecorder = new MediaRecorder();
    }

    public void stopgo(View view){
        mediaRecorder.stop();//停止刻录
    }
    public void openkai(View view){
        //重置
        mediaRecorder.reset();
        //设置视频Video和音频Audio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);
        //每秒3帧
        mediaRecorder.setVideoFrameRate(3);
        //设置保存的路径
        mediaRecorder.setOutputFile("mnt/sdcard/170223_"+System.currentTimeMillis()+".mp4");
        //将画面展示到SurfaceView
        mediaRecorder.setPreviewDisplay(sv_main_surfaceview.getHolder().getSurface());
        try {
            //预期准备
            mediaRecorder.prepare();
            //开始刻录
            mediaRecorder.start();

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

需要添加的权限：

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