VideoView与SurfaceView

1.VideoView 播放视频，SurfaceView展示视频，或是照片

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="com.zking.video">
    <!--读取内存条的权限-->
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
    <!--设置照相机的权限-->
    <uses-permission android:name="android.permission.CAMERA"></uses-permission>
    <!--创建文件的权限-->
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"></uses-permission>
    <!--写到内存条的权限-->
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
        </activity>
        <activity android:name=".PhoneActivity"
            android:screenOrientation="landscape">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>

                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>

</manifest>

播放视频：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.zking.video.MainActivity">

    <VideoView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/main_videoView"/>



</LinearLayout>

package com.zking.video;

import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.MediaController;
import android.widget.VideoView;

public class MainActivity extends AppCompatActivity {

    private VideoView main_videoView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        main_videoView = (VideoView) findViewById(R.id.main_videoView);
        //设置播放源
        main_videoView.setVideoURI(Uri.parse("file://mnt/sdcard/DCIM/Camera/VID20170720090922.mp4"));
        //播放
        MediaController mediaController=new MediaController(this);
        mediaController.setMediaPlayer(main_videoView);
        main_videoView.setMediaController(mediaController);
    }
}

拍照
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.zking.video.PhoneActivity">

    <SurfaceView
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:id="@+id/main_surfaceView"/>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/main_button"
        android:text="拍照"/>
</LinearLayout>


package com.zking.video;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;

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

public class PhoneActivity extends AppCompatActivity {

    private SurfaceView main_surfaceView;
    private Camera camera;
    private Button main_button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_phone);
        //捕捉镜头
        main_surfaceView = (SurfaceView) findViewById(R.id.main_surfaceView);
        //照相
        main_button = (Button) findViewById(R.id.main_button);
        //回调函数
        main_surfaceView.getHolder().addCallback(new SurfaceHolder.Callback() {
            @Override
            public void surfaceCreated(SurfaceHolder holder) {
                //打开摄像头
                //打开后置
                camera = Camera.open();
                //设置参数
                Camera.Parameters parameters= camera.getParameters();
                //设置照片的格式
                parameters.setPictureFormat(PixelFormat.JPEG);
                //设置照片的质量
                parameters.set("jpeg_quality",100);

                camera.setParameters(parameters);
                //开启预览效果
                camera.startPreview();
                try {
                    camera.setPreviewDisplay(main_surfaceView.getHolder());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

            @Override
            public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

            }

            @Override
            public void surfaceDestroyed(SurfaceHolder holder) {
                camera.stopPreview();
                //释放内存
                camera.release();
            }
        });



        //拍照
        main_button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                camera.takePicture(null, null, new Camera.PictureCallback() {
                    @Override
                    public void onPictureTaken(byte[] data, Camera camera) {
                        //图片压缩
                        Bitmap bitmap=BitmapFactory.decodeByteArray(data,0,data.length);
                        //时间戳
                        Calendar calendar=Calendar.getInstance();
                        int year=calendar.get(Calendar.YEAR);
                        int month=calendar.get(Calendar.MONTH);
                        int day=calendar.get(Calendar.DAY_OF_MONTH);
                        try {
                            FileOutputStream fileOutputStream=new FileOutputStream("/mnt/sdcard/DCIM/Camera/G160628_"+year+month+day+"_"+System.currentTimeMillis()+".jpg");
                            bitmap.compress(Bitmap.CompressFormat.JPEG,85,fileOutputStream);
                            camera.stopPreview();
                            camera.startPreview();
                        } catch (FileNotFoundException e) {
                            e.printStackTrace();
                        }
                    }
                });
            }
        });

    }



}