Android Media(拍照)

来源：互联网发布：树莓派 gpio 编程编辑：程序博客网时间：2024/06/02 07:00
代码实现：
package com.zking.administrator.g160628_android28_playvideo;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 java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.util.Calendar;public class CameraActivity extends AppCompatActivity {    private SurfaceView sv_camera_surface;    private Camera camera;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_camera);        sv_camera_surface = (SurfaceView) findViewById(R.id.sv_camera_surface);        sv_camera_surface.getHolder().addCallback(new SurfaceHolder.Callback() {            @Override            public void surfaceCreated(SurfaceHolder holder) {                  //打开摄像头                camera = Camera.open();                //设置摄像参数                Camera.Parameters parameters= camera.getParameters();                parameters.setPictureFormat(PixelFormat.JPEG);                parameters.set("jpeg-quality",100);                camera.setParameters(parameters);                //开启预览效果                camera.startPreview();                //将画面展示到surfaceView                try {                    camera.setPreviewDisplay(sv_camera_surface.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();                camera.release();            }        });    }    public void takePhoto(View view){        camera.takePicture(null, null, new Camera.PictureCallback() {            @Override            public void onPictureTaken(byte[] data, Camera camera) {                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 fos=new FileOutputStream("/mnt/sdcard/dcim/camera/G160628_"+year+(month+1)+day+"_"+System.currentTimeMillis()+".jpg");                    //压缩                    bitmap.compress(Bitmap.CompressFormat.JPEG,85,fos);                    camera.stopPreview();                    camera.startPreview();                } catch (FileNotFoundException e) {                    e.printStackTrace();                }            }        });    }}
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