安卓使用Camera实现拍照并保存到内存卡中

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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>

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