平时写项目总会遇到上传图片，都有写调用相机相册，很烦很累，所以这里封装好了 只需调用此类，就可以实现相机相册，并且返回图像对其做处理，可以返回bitmap 或者转成String去上传服务器。
PhotoUtil.CAMRA_SETRESULT_CODE：相册返回
PhotoUtil.PHOTO_SETRESULT_CODE：拍照返回
photoUtil.getCameraPath(Intent data):获取相册图片路径
photoUtil.getPhotoPath():获取拍照后图片路径
photoUtil.readBitmapAutoSize(String path);将图片转换成bitmap
photoUtil.bitmaptoString(bitmap);将bitmap转换成字符串
DeMO下载地址
MainActivity调用PhoUtil
package com.example.photodemo;import android.support.v7.app.ActionBarActivity;import android.content.Intent;import android.graphics.Bitmap;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.ImageView;public class MainActivity extends ActionBarActivity {private Button btn;private ImageView img;private PhotoUtil photoUtil;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);btn=(Button) findViewById(R.id.btn);img=(ImageView) findViewById(R.id.img);btn.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubphotoUtil=new PhotoUtil(MainActivity.this);}});}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {// TODO Auto-generated method stubsuper.onActivityResult(requestCode, resultCode, data);//相册返回if(PhotoUtil.CAMRA_SETRESULT_CODE==requestCode){if(resultCode==RESULT_OK) {//相册选中图片路径String cameraPath = photoUtil.getCameraPath(data);Bitmap bitmap = photoUtil.readBitmapAutoSize(cameraPath);img.setImageBitmap(bitmap);String str=photoUtil.bitmaptoString(bitmap);}}//相机返回else if(PhotoUtil.PHOTO_SETRESULT_CODE==requestCode){if(resultCode==RESULT_OK){String photoPath=photoUtil.getPhotoPath();Bitmap bitmap=photoUtil.readBitmapAutoSize(photoPath);String str=photoUtil.bitmaptoString(bitmap);img.setImageBitmap(bitmap);}}}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}@Overridepublic boolean onOptionsItemSelected(MenuItem item) {// Handle action bar item clicks here. The action bar will// automatically handle clicks on the Home/Up button, so long// as you specify a parent activity in AndroidManifest.xml.int id = item.getItemId();if (id == R.id.action_settings) {return true;}return super.onOptionsItemSelected(item);}}封装好的PhtoUtilpackage com.example.photodemo;import android.annotation.SuppressLint;import android.app.Activity;import android.app.AlertDialog;import android.content.Context;import android.content.Intent;import android.database.Cursor;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.drawable.ColorDrawable;import android.graphics.drawable.Drawable;import android.graphics.drawable.StateListDrawable;import android.net.Uri;import android.os.Environment;import android.provider.MediaStore;import android.util.Base64;import android.view.Gravity;import android.view.View;import android.widget.LinearLayout;import android.widget.TextView;import android.widget.Toast;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.IOException;import java.text.SimpleDateFormat;import java.util.Date;/** * Created by CarrayDraw on 2015/8/12. */public class PhotoUtil {//相册，拍照，取消private TextView camera,photo,back;private AlertDialog dialog;private Context context;// 创建一个以当前时间为名称的文件public static final int CAMRA_SETRESULT_CODE=0;//相册返回码public static final int PHOTO_SETRESULT_CODE=1;//拍照返回码public PhotoUtil(Context context) {this.context=context;if (android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)) {View view=initView();dialog=new AlertDialog.Builder(context).setTitle("图片来源").setView(view).create();dialog.show();addListener();}else{Toast.makeText(context,"请插入内存卡",Toast.LENGTH_SHORT).show();}} //设置点击背景private StateListDrawable getBackGroundColor() {Drawable press=new ColorDrawable(0xffd7d7d7);Drawable normal=new ColorDrawable(0xffffffff);StateListDrawable drawable = new StateListDrawable();drawable.addState(new int[]{android.R.attr.state_pressed}, press);drawable.addState(new int[]{-android.R.attr.state_pressed},normal);return drawable;}private void addListener() {back.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {dialog.dismiss();}});camera.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {Intent intent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);((Activity) context).startActivityForResult(intent, CAMRA_SETRESULT_CODE);dialog.dismiss();}});photo.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(getPhotoPath())));((Activity) context).startActivityForResult(intent, PHOTO_SETRESULT_CODE);dialog.dismiss();}});}@SuppressLint("NewApi") private View initView() {LinearLayout layout=new LinearLayout(context);LinearLayout.LayoutParams params=new LinearLayout.LayoutParams( LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.MATCH_PARENT);layout.setLayoutParams(params);layout.setOrientation(LinearLayout.VERTICAL);layout.setBackgroundColor(0xffffffff);camera=new TextView(context);LinearLayout.LayoutParams textViewParams=new LinearLayout.LayoutParams( LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.WRAP_CONTENT);camera.setLayoutParams(textViewParams);camera.setPadding(20, 20, 0, 20);camera.setText("相册");camera.setTextSize(20);camera.setBackground(getBackGroundColor());TextView blod1=new TextView(context);LinearLayout.LayoutParams blodViewParams=new LinearLayout.LayoutParams( LinearLayout.LayoutParams.MATCH_PARENT,1);blod1.setLayoutParams(blodViewParams);blod1.setBackgroundColor(0xffd7d7d7);TextView blod2=new TextView(context);blod2.setLayoutParams(blodViewParams);blod2.setBackgroundColor(0xffd7d7d7);photo=new TextView(context);LinearLayout.LayoutParams photoParams=new LinearLayout.LayoutParams( LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.WRAP_CONTENT);photo.setLayoutParams(photoParams);photo.setPadding(20, 20, 0, 20);photo.setText("拍照");photo.setBackground(getBackGroundColor());photo.setTextSize(20);back=new TextView(context);LinearLayout.LayoutParams backParams=new LinearLayout.LayoutParams( LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.WRAP_CONTENT);back.setLayoutParams(backParams);back.setGravity(Gravity.CENTER);back.setPadding(0, 25, 0, 25);back.setText("取消");back.setTextSize(14);back.setBackground(getBackGroundColor());layout.addView(camera);layout.addView(blod1);layout.addView(photo);layout.addView(blod2);layout.addView(back);return layout;}// 拍照使用系统当前日期加以调整作为照片的名称private static String getPhotoFileName() {Date date = new Date(System.currentTimeMillis());SimpleDateFormat dateFormat = new SimpleDateFormat("'IMG'_yyyyMMdd_HHmmss");return dateFormat.format(date) + ".jpg";}//拍照路径public String getPhotoPath(){File file=new File(Environment.getExternalStorageDirectory(),"/imgs");if(!file.exists()){file.mkdirs();}String path=file.getPath()+"photo.jpg";return path;}//file转换成BitMappublic static Bitmap readBitmapAutoSize(String filePath) {// outWidth和outHeight是目标图片的最大宽度和高度，用作限制Bitmap bm = null;try {BitmapFactory.Options opt = new BitmapFactory.Options();opt.inJustDecodeBounds = true;// 设置只是解码图片的边距，此操作目的是度量图片的实际宽度和高度BitmapFactory.decodeFile(filePath, opt);opt.inDither = false;opt.inPreferredConfig = Bitmap.Config.RGB_565;// 设置加载图片的颜色数为16bit，默认是RGB_8888，表示24bit颜色和透明通道，但一般用不上// opt.inSampleSize = 1;opt.inSampleSize = computeSampleSize(opt, -1, 900 * 900);opt.inJustDecodeBounds = false;bm = BitmapFactory.decodeFile(filePath, opt);} catch (Exception e) {e.printStackTrace();}return bm;}public static int computeSampleSize(BitmapFactory.Options options,int minSideLength, int maxNumOfPixels) {int initialSize = computeInitialSampleSize(options, minSideLength,maxNumOfPixels);int roundedSize;if (initialSize <= 8) {roundedSize = 1;while (roundedSize < initialSize) {roundedSize <<= 1;}} else {roundedSize = (initialSize + 7) / 8 * 8;}return roundedSize;}private static int computeInitialSampleSize(BitmapFactory.Options options,int minSideLength, int maxNumOfPixels) {double w = options.outWidth;double h = options.outHeight;int lowerBound = (maxNumOfPixels == -1) ? 1 : (int) Math.ceil(Math.sqrt(w * h / maxNumOfPixels));int upperBound = (minSideLength == -1) ? 128 : (int) Math.min(Math.floor(w / minSideLength), Math.floor(h / minSideLength));if (upperBound < lowerBound) {return lowerBound;}if ((maxNumOfPixels == -1) && (minSideLength == -1)) {return 1;} else if (minSideLength == -1) {return lowerBound;} else {return upperBound;}}//bitmap转换成字节流public static String bitmaptoString(Bitmap bitmap) {// 将Bitmap转换成字符串String result = "";ByteArrayOutputStream bStream = new ByteArrayOutputStream();bitmap.compress(Bitmap.CompressFormat.JPEG, 100, bStream);byte[] bytes = bStream.toByteArray();byte[] bb = Base64.encode(bytes,Base64.DEFAULT);try {result = new String(bb, "UTF-8").replace("+", "%2B");} catch (IOException e) {e.printStackTrace();} finally {}return result;}//得到相册路径public String getCameraPath(Intent data){Uri originalUri = data.getData();String[] proj = {MediaStore.Images.Media.DATA};//好像是android多媒体数据库的封装接口，，具体的看Android文档Cursor cursor = ((Activity)context).managedQuery(originalUri, proj, null, null, null);//按我个人理解 这个是获得用户选择的图片的索引值int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);//将光标移至开头 ，这个很重要，不小心很容易引起越界cursor.moveToFirst();//最后根据索引值获取图片路径String path = cursor.getString(column_index);return path;}}
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带着我的相机和电脑，远离繁华，走向空旷。
