UploadImageUtils.java
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package com.cnlive.goldenline.util;
import android.annotation.TargetApi;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.provider.DocumentsContract;
import android.provider.MediaStore;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.text.TextUtils;
import com.orhanobut.logger.Logger;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
/**
* Created by gujun on 2015/5/19.
*/
public class UploadImageUtils {
private static final String AVATAR_PATH = "/com.cnlive.goldenline/image/";
private static Bitmap getimage(Context context,String srcPath) {
BitmapFactory.Options newOpts = new BitmapFactory.Options();
//开始读入图片，此时把options.inJustDecodeBounds 设回true了
newOpts.inJustDecodeBounds = true;
Bitmap bitmap = BitmapFactory.decodeFile(srcPath,newOpts);//此时返回bm为空
newOpts.inJustDecodeBounds = false;
int scale = (int) (newOpts.outHeight / (float) 400);
if (scale <= 0)
scale = 1;
newOpts.inSampleSize = scale;//设置缩放比例
//重新读入图片，注意此时已经把options.inJustDecodeBounds 设回false了
bitmap = BitmapFactory.decodeFile(srcPath, newOpts);
return compressImage(bitmap);//压缩好比例大小后再进行质量压缩
}
private static Bitmap compressImage(@Nullable Bitmap image) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
if (image != null) {
image.compress(Bitmap.CompressFormat.JPEG, 80, baos);//质量压缩方法，这里100表示不压缩，把压缩后的数据存放到baos中
}
ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());//把压缩后的数据baos存放到ByteArrayInputStream中
Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null);//把ByteArrayInputStream数据生成图片
return bitmap;
}
// 写到sdcard中
@NonNull
public static String writeUriToSDcard(@NonNull Context context, @NonNull Uri uriPath) throws IOException {
Bitmap bitmap = getimage(context, getPath(context, uriPath));
return writhToSDcard(context,bitmap);
}
@NonNull
public static String writeStringToSDcard(Context context, String path) throws IOException {
Bitmap bitmap = getimage(context, path);
return writhToSDcard(context,bitmap);
}
@NonNull
private static String writhToSDcard(Context context, @Nullable Bitmap bitmap)throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
if (bitmap != null) {
bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos);//png类型
}
String path = getAvatarPath(context);
if(!TextUtils.isEmpty(path)){
FileOutputStream out=new FileOutputStream(new File(path));
out.write(baos.toByteArray());
try {
out.flush();
out.close();
}catch (Exception e){
}
}
return path;
}
@NonNull
public static String getAvatarPath(Context context){
String status = Environment.getExternalStorageState();
String path = "";
if (Environment.MEDIA_MOUNTED.equals(status)) {
String rootPath = Environment.getExternalStorageDirectory().getAbsolutePath() + AVATAR_PATH;
File file = new File(rootPath);
if(!file.exists()){
file.mkdirs();
}
path = rootPath+"avatar.png";
}else {
SystemTools.show_msg(context, "未插入SD卡");
}
return path;
}
@TargetApi(Build.VERSION_CODES.KITKAT)
private static String getPath(@NonNull final Context context, @NonNull final Uri uri) {
final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
// DocumentProvider
if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
// ExternalStorageProvider
if (isExternalStorageDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
if ("primary".equalsIgnoreCase(type)) {
return Environment.getExternalStorageDirectory() + "/" + split[1];
}
// TODO handle non-primary volumes
}
// DownloadsProvider
else if (isDownloadsDocument(uri)) {
final String id = DocumentsContract.getDocumentId(uri);
final Uri contentUri = ContentUris.withAppendedId(
Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
return getDataColumn(context, contentUri, null, null);
}
// MediaProvider
else if (isMediaDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
Uri contentUri = null;
if ("image".equals(type)) {
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(type)) {
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(type)) {
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}
final String selection = "_id=?";
final String[] selectionArgs = new String[]{
split[1]
};
return getDataColumn(context, contentUri, selection, selectionArgs);
}
}
// MediaStore (and general)
else if ("content".equalsIgnoreCase(uri.getScheme())) {
// Return the remote address
if (isGooglePhotosUri(uri))
return uri.getLastPathSegment();
return getDataColumn(context, uri, null, null);
}
// File
else if ("file".equalsIgnoreCase(uri.getScheme())) {
return uri.getPath();
}
return null;
}
/**
* Get the value of the data column for this Uri. This is useful for
* MediaStore Uris, and other file-based ContentProviders.
*
* @param context The context.
* @param uri The Uri to query.
* @param selection (Optional) Filter used in the query.
* @param selectionArgs (Optional) Selection arguments used in the query.
* @return The value of the _data column, which is typically a file path.
*/
public static String getDataColumn(@NonNull Context context, @NonNull Uri uri, String selection,
String[] selectionArgs) {
Cursor cursor = null;
final String column = "_data";
final String[] projection = {
column
};
try {
cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,
null);
if (cursor != null && cursor.moveToFirst()) {
final int index = cursor.getColumnIndexOrThrow(column);
return cursor.getString(index);
}
}catch(Exception e){
Logger.e("cursor error : " + e.getMessage());
} finally {
if (cursor != null)
cursor.close();
}
return null;
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is ExternalStorageProvider.
*/
public static boolean isExternalStorageDocument(@NonNull Uri uri) {
return "com.android.externalstorage.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is DownloadsProvider.
*/
public static boolean isDownloadsDocument(@NonNull Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is MediaProvider.
*/
public static boolean isMediaDocument(@NonNull Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is Google Photos.
*/
public static boolean isGooglePhotosUri(@NonNull Uri uri) {
return "com.google.android.apps.photos.content".equals(uri.getAuthority());
}
}