Android-拍照

2019-11-08 00:36:34

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Activity文件<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"><SurfaceView android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/i_iv_SurfaceView" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="拍照" android:onClick="takePtho" /></RelativeLayout>Class文件package com.example.g150825_android27;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 0022. */public class Cameraa extends AppCompatActivity{ PRivate SurfaceView i_iv_surfaceView; private Camera cameraa; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_camera); i_iv_surfaceView = (SurfaceView) findViewById(R.id.i_iv_SurfaceView); i_iv_surfaceView.getHolder().addCallback(new SurfaceHolder.Callback() { @Override public void surfaceCreated(SurfaceHolder holder) { //打开摄像头 cameraa = Camera.open(); // 给摄像头设置参数 Camera.Parameters parameters =cameraa.getParameters(); // 设置照片的输出格式 parameters.setPictureFormat(PixelFormat.JPEG); // 设置照片的质量 parameters.set("jpeg-quality",85); // 给照相机设置参数 cameraa.setParameters(parameters); //将摄像头的画面显示到SurfaceView控件上 try { cameraa.setPreviewDisplay(i_iv_surfaceView.getHolder()); //开启预览 cameraa.startPreview(); } catch (IOException e) { e.printStackTrace(); } } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } @Override public void surfaceDestroyed(SurfaceHolder holder) { } }); } public void takePtho(View View){ cameraa.takePicture(null,null, new Camera.PictureCallback() { @Override public void onPictureTaken(byte[] bytes, Camera camera) { //将字节数组转成图片 //实例化输出流对象，将bytes写入即可 //压缩 //将字节数组转成图片 Bitmap bitmap =BitmapFactory.decodeByteArray(bytes,0,bytes.length); try { FileOutputStream fs=new FileOutputStream("/mnt/sdcard/DCIM/Camera/G150825_"+System.currentTimeMillis()+".png"); bitmap.compress(Bitmap.CompressFormat.PNG,85,fs); cameraa.stopPreview();; cameraa.startPreview(); } catch (FileNotFoundException e) { e.printStackTrace(); } } }); }}

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