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>