一站式解决,Android 拍照图库的各种问题

　　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

嘿嘿..开代码:

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;
    }
}