安卓使用Camera实现拍照并保存到内存卡中

实现效果图：

-------》运行截图

-------》拍照效果图：

安卓使用Camera实现拍照，使用了SurfaceView回调函数，FileOutputStream流将图片保存至内存卡中

Activity代码：

package com.example.android_vedioplayer_camera_recorder;

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

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

/**
 * Created by Administrator on 2017/2/22.
 */
public class CameraActivity extends AppCompatActivity {
    private SurfaceView sv_camera_surfaceview;
    private Camera camera;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_camera);
        sv_camera_surfaceview = (SurfaceView) findViewById(R.id.sv_camera_surfaceview);
        sv_camera_surfaceview.getHolder().addCallback(new SurfaceHolder.Callback() {
            @Override
            public void surfaceCreated(SurfaceHolder holder) {
                //打开照相机
                camera = Camera.open();
                //给照相机设置参数
                Camera.Parameters parameters=camera.getParameters();
                //设置保存格式
                parameters.setPictureFormat(PixelFormat.JPEG);
                //设置质量
                parameters.set("jpeg-quality",85);
                //给照相机设置参数
                camera.setParameters(parameters);
                //将照相机捕捉的画面展示到SurfaceView
                try {
                    camera.setPreviewDisplay(sv_camera_surfaceview.getHolder());
                    //开启预览
                    camera.startPreview();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

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

            }
            @Override
            public void surfaceDestroyed(SurfaceHolder holder) {

            }
        });
    }

    //拍照
    public void takePhoto(View view){
        camera.takePicture(null, null, new Camera.PictureCallback() {
            @Override
            public void onPictureTaken(byte[] data, Camera camera) {
                //将字节数组
                Bitmap bitmap= BitmapFactory.decodeByteArray(data,0,data.length);
                //输出流保存数据
                try {
                    FileOutputStream fileOutputStream=new FileOutputStream("/mnt/sdcard/DCIM/camera/LuoMei\"+System.currentTimeMillis()+\".png");
                    bitmap.compress(Bitmap.CompressFormat.PNG,85,fileOutputStream);
                    camera.stopPreview();
                    camera.startPreview();
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                }
            }
        });
    }


}

layout.xml代码：

xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <SurfaceView
        android:layout_width="match_parent"
        android:layout_height="430dp"
        android:id="@+id/sv_camera_surfaceview"
        />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:text="拍照"
        android:layout_marginLeft="150dp"
        android:onClick="takePhoto"
        />

RelativeLayout>