android 拍照，图库，相册，上传

在android开发中, 在一些编辑个人信息的时候,经常会有头像这么一个东西,就两个方面,调用系统相机拍照,调用系统图库获取图片.但是往往会遇到各种问题:

1.oom

2.图片方向不对

3.activity result 的时候data == null

4.调用图库的时候没找到软件

首先是调用系统拍照,和图库的代码

package com.chzh.fitter.util;import java.io.File;import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.provider.MediaStore;
import android.widget.Toast;//在onActivityResult方法中根据requestCode和resultCode来获取当前拍照的图片地址。
//注意：这里有个问题，在有些机型当中（如SamsungI939、note2等）遇见了当拍照并存储之后，intent当中得到的data为空：
/*** data = null 的情况主要是由于拍照的时候横屏了,导致重新create, 普通的解决方法可以在sharedpreference里面保存拍照文件的路径(onSaveInstance保存),* 在onRestoreSaveInstance里面在获取出来.* 最简单的可以用fileUtil 里面的一个静态变量保存起来..* */public class CameraUtil {private static final String IMAGE_TYPE = "image/*";private Context mContext;public CameraUtil(Context context) {mContext = context;}/*** 打开照相机* @param activity 当前的activity* @param requestCode 拍照成功时activity forResult 的时候的requestCode* @param photoFile 拍照完毕时,图片保存的位置*/public void openCamera(Activity activity, int requestCode, File photoFile) {Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));activity.startActivityForResult(intent, requestCode);}/*** 本地照片调用* @param activity* @param requestCode*/public void openPhotos(Activity activity, int requestCode) {if (openPhotosNormal(activity, requestCode) && openPhotosBrowser(activity, requestCode) && openPhotosFinally());}/*** PopupMenu打开本地相册.*/private boolean openPhotosNormal(Activity activity, int actResultCode) {Intent intent = new Intent(Intent.ACTION_PICK, null);intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,IMAGE_TYPE);try {activity.startActivityForResult(intent, actResultCode);} catch (android.content.ActivityNotFoundException e) {return true;}return false;}/*** 打开其他的一文件浏览器,如果没有本地相册的话*/private boolean openPhotosBrowser(Activity activity, int requestCode) {Toast.makeText(mContext, "没有相册软件，运行文件浏览器", Toast.LENGTH_LONG).show();Intent intent = new Intent(Intent.ACTION_GET_CONTENT); // "android.intent.action.GET_CONTENT"intent.setType(IMAGE_TYPE); // 查看类型 String IMAGE_UNSPECIFIED =// "image/*";Intent wrapperIntent = Intent.createChooser(intent, null);try {activity.startActivityForResult(wrapperIntent, requestCode);} catch (android.content.ActivityNotFoundException e1) {return true;}return false;}/*** 这个是找不到相关的图片浏览器,或者相册*/private boolean openPhotosFinally() {Toast.makeText(mContext, "您的系统没有文件浏览器或则相册支持,请安装！", Toast.LENGTH_LONG).show();return false;}/*** 获取从本地图库返回来的时候的URI解析出来的文件路径* @return*/public static String getPhotoPathByLocalUri(Context context, Intent data) {Uri selectedImage = data.getData();String[] filePathColumn = { MediaStore.Images.Media.DATA };Cursor cursor = context.getContentResolver().query(selectedImage,filePathColumn, null, null, null);cursor.moveToFirst();int columnIndex = cursor.getColumnIndex(filePathColumn[0]);String picturePath = cursor.getString(columnIndex);cursor.close();return picturePath;}}

　　接下来是解决oom的

package com.chzh.fitter.util;import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.IOException;import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.BitmapFactory;
import android.graphics.BitmapFactory.Options;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.media.ExifInterface;
import android.net.Uri;
import android.util.Log;
import android.widget.ImageView;import com.androidquery.util.AQUtility;/*** @author jarrahwu**/
public class ImageUtil {/*** Utility method for downsampling images.** @param path*            the file path* @param data*            if file path is null, provide the image data directly* @param target*            the target dimension* @param isWidth*            use width as target, otherwise use the higher value of height*            or width* @param round*            corner radius* @return the resized image*/public static Bitmap getResizedImage(String path, byte[] data, int target,boolean isWidth, int round) {Options options = null;if (target > 0) {Options info = new Options();info.inJustDecodeBounds = true;//设置这两个属性可以减少内存损耗info.inInputShareable = true;info.inPurgeable = true;decode(path, data, info);int dim = info.outWidth;if (!isWidth)dim = Math.max(dim, info.outHeight);int ssize = sampleSize(dim, target);options = new Options();options.inSampleSize = ssize;}Bitmap bm = null;try {bm = decode(path, data, options);} catch (OutOfMemoryError e) {L.red(e.toString());e.printStackTrace();}if (round > 0) {bm = getRoundedCornerBitmap(bm, round);}return bm;}private static Bitmap decode(String path, byte[] data,BitmapFactory.Options options) {Bitmap result = null;if (path != null) {result = decodeFile(path, options);} else if (data != null) {// AQUtility.debug("decoding byte[]");result = BitmapFactory.decodeByteArray(data, 0, data.length,options);}if (result == null && options != null && !options.inJustDecodeBounds) {AQUtility.debug("decode image failed", path);}return result;}private static Bitmap decodeFile(String path, BitmapFactory.Options options) {Bitmap result = null;if (options == null) {options = new Options();}options.inInputShareable = true;options.inPurgeable = true;FileInputStream fis = null;try {fis = new FileInputStream(path);FileDescriptor fd = fis.getFD();// AQUtility.debug("decoding file");// AQUtility.time("decode file");result = BitmapFactory.decodeFileDescriptor(fd, null, options);// AQUtility.timeEnd("decode file", 0);} catch (IOException e) {Log.error("TAG",e.toString())} finally {fis.close()}return result;}private static int sampleSize(int width, int target) {int result = 1;for (int i = 0; i < 10; i++) {if (width < target * 2) {break;}width = width / 2;result = result * 2;}return result;}/*** 获取圆角的bitmap* @param bitmap* @param pixels* @return*/private static Bitmap getRoundedCornerBitmap(Bitmap bitmap, int pixels) {Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),bitmap.getHeight(), Config.ARGB_8888);Canvas canvas = new Canvas(output);final int color = 0xff424242;final Paint paint = new Paint();final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());final RectF rectF = new RectF(rect);final float roundPx = pixels;paint.setAntiAlias(true);canvas.drawARGB(0, 0, 0, 0);paint.setColor(color);canvas.drawRoundRect(rectF, roundPx, roundPx, paint);paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));canvas.drawBitmap(bitmap, rect, rect, paint);return output;}/*** auto fix the imageOrientation* @param bm source* @param iv imageView  if set invloke it's setImageBitmap() otherwise do nothing* @param uri image Uri if null user path* @param path image path if null use uri*/public static Bitmap autoFixOrientation(Bitmap bm, ImageView iv, Uri uri,String path) {int deg = 0;try {ExifInterface exif = null;if (uri == null) {exif = new ExifInterface(path);}else if (path == null) {exif = new ExifInterface(uri.getPath());}if (exif == null) {Log.error("TAG","exif is null check your uri or path");return bm;}String rotate = exif.getAttribute(ExifInterface.TAG_ORIENTATION);int rotateValue = Integer.parseInt(rotate);System.out.println("orientetion : " + rotateValue);switch (rotateValue) {case ExifInterface.ORIENTATION_ROTATE_90:deg = 90;break;case ExifInterface.ORIENTATION_ROTATE_180:deg = 180;break;case ExifInterface.ORIENTATION_ROTATE_270:deg = 270;break;default:deg = 0;break;}} catch (Exception ee) {Log.d("catch img error", "return");if(iv != null)iv.setImageBitmap(bm);return bm;}Matrix m = new Matrix();m.preRotate(deg);bm = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(), bm.getHeight(), m, true);//bm = Compress(bm, 75);if(iv != null)iv.setImageBitmap(bm);return bm;}
}

另外对于图片处理：目前比较不错的框架我推荐 facebook 的 fresco 地址介绍 http://www.fresco-cn.org/

另外 android 开发的小伙伴们可以加我们的qq群交流问题： android 开发经验交流群：454430053

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