代码二次封装-xUtils（android） _android

少年恃险若平地，独倚长剑凌清秋。这篇文章主要讲述代码二次封装-xUtils（android）相关的知识，希望能为你提供帮助。
通常我们会引用很多lib
而且会出现lib 与我们的功能仅仅差一点点这种情况我们最好不要去改动源代码而是进行二次封装
举例我使用 xUtils的二次封装此处说明我是搞ios的这个是android今天mac 机子没网蛋疼
使用到pulltorefresh 和 xUtils

网络封装
因为此处是没有文件处理所以我把參数转换里面file给去掉了假设须要自行加上就可以

public class ApiHttpUtil { final public static String base_url_api = Constants.base_url_api; private String api_url; HttpApiCallBack callBack; Map< String, String> paramsMap; CacheEntity cacheEntity; Long timeOut = 0L; public ApiHttpUtil() { }public ApiHttpUtil(HttpApiCallBack callBack) { this.callBack = callBack; this.cacheEntity = new CacheEntity(); }public ApiHttpUtil(String url, HttpApiCallBack callBack) { this.api_url = url; this.callBack = callBack; this.cacheEntity = new CacheEntity(); }public String getApiUrl() { if (StringUtils.isEmpty(api_url)) { return base_url_api + "?"; } if (api_url.startsWith("http")) { return api_url; } return base_url_api + "/" + api_url; }public String strValue(Object obj) { if (obj instanceof String) { return (String) obj; } else if (obj instanceof Integer) { return Integer.toString((Integer) obj); } else if (obj instanceof Double) { return Double.toString((Double) obj); } else { // TODO 其它 object 类转换 http string } return String.valueOf(obj); }public void getObjs(Object... objs) { Map< String, Object> map = getMap(objs); get(map); }public void postObjs(Object... objs) { Map< String, Object> map = getMap(objs); post(map); }/* * key --- String Integer Double value -- +File */ public Map< String, Object> getMap(Object[] objs) { Map< String, Object> map = new HashMap< String, Object> (); if (objs.length % 2 == 0) { for (int i = 0; i < objs.length; i += 2) { try { String key = (String) strValue(objs[i]); Object value = https://www.songbingjia.com/android/null; if (objs.length > i + 1) { Object objs2 = objs[i + 1]; value = strValue(objs2); } if (value instanceof String) { if (!StringUtils.isEmpty((String) value) & & !StringUtils.isEmpty(key)) { map.put(key, value); } } else if (value instanceof File) { map.put(key, value); } } catch (Exception e) { } } } return map; }public void get() { get(null); }public void post() { post(null); }public ApiHttpUtil setTimeOut(int second) { this.timeOut = second * 1000L; return this; }public void post(Map< String, Object> map) { RequestParams params = new RequestParams(); if (map != null) { for (Entry< String, Object> entry : map.entrySet()) { if (entry.getValue() instanceof String) { params.addBodyParameter(entry.getKey(), (String) entry.getValue()); } else { params.addBodyParameter(entry.getKey(), strValue(entry.getValue())); } } }if (timeOut < = 0 & & !useCache(map)) { send(HttpRequest.HttpMethod.POST, params); } }public void get(Map< String, Object> map) {RequestParams params = new RequestParams(); if (map != null) { for (Entry< String, Object> entry : map.entrySet()) { if (entry.getValue() instanceof String) { params.addQueryStringParameter(entry.getKey(), (String) entry.getValue()); } else { params.addQueryStringParameter(entry.getKey(), strValue(entry.getValue())); } } } if (timeOut < = 0 & & !useCache(map)) { send(HttpRequest.HttpMethod.GET, params); } }public boolean useCache(Map< String, Object> map) { this.cacheEntity.setKey(getApiUrl() + map.toString()); if (AppContext.mInstance != null) { if (!StringUtils.isEmpty(this.cacheEntity.getValue())) { if (!AppUtils.isNetworkAvailable(AppContext.mInstance)) { AppUtils.openNetworkSettings(AppContext.mInstance); onSuccess(this.cacheEntity.getCacheValue()); return true; } } String result = this.cacheEntity.getValue(timeOut); if (!StringUtils.isEmpty(result)) { onSuccess(result); return true; } } return false; }public void send(HttpRequest.HttpMethod method, RequestParams params) { HttpUtils http = new HttpUtils(); http.send(method, getApiUrl(), params, new RequestCallBack< String> () { @Override public void onStart() { callBack.onStart(); }@Override public void onLoading(long total, long current, boolean isUploading) { callBack.onLoading(total, current, isUploading); }@Override public void onCancelled() { callBack.onCancelled(); }@Override public void onSuccess(ResponseInfo< String> responseInfo) { ApiHttpUtil.this.onSuccess(responseInfo.result); }@Override public void onFailure(HttpException error, String msg) { callBack.onFailure(error, msg); } }); }public boolean handleError(String result) { // TODO return false; }public void onSuccess(String result) { if (handleError(result)) { return; } if (callBack.onSuccess(result)) { cacheEntity.setValue(result); return; } try { JSONObject jsonResults = new JSONObject(result); callBack.onSuccess(jsonResults); cacheEntity.setValue(result); } catch (Exception e) { callBack.onFailure(e,"JSONObject 解析错误"); e.printStackTrace(); } } }

在此贴出部分上面用到的代码

/* * 是否有网 */ public static boolean isNetworkAvailable(Context context) { ConnectivityManager connectivity = (ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE); if (connectivity == null) { Log.i("NetWorkState", "Unavailabel"); return false; } else { NetworkInfo[] info = connectivity.getAllNetworkInfo(); if (info != null) { for (int i = 0; i < info.length; i++) { if (info[i].getState() == NetworkInfo.State.CONNECTED) { Log.i("NetWorkState", "Availabel"); return true; } } } } return false; }/* * 打开网络设置界面请求 */ public static AlertDialog dialog_networkSettings; public static void openNetworkSettings(final Context content) { if (dialog_networkSettings == null) { dialog_networkSettings = new AlertDialog.Builder(content) .setTitle("开启网络服务") .setMessage("本软件须要使用网络资源，是否开启网络？") .setPositiveButton("确定", new DialogInterface.OnClickListener() {@Override public void onClick(DialogInterface dialog, int which) { // Go to the activity of settings of wireless if (android.os.Build.VERSION.SDK_INT > 13) { content.startActivity(new Intent( android.provider.Settings.ACTION_SETTINGS)); } else { content.startActivity(new Intent( android.provider.Settings.ACTION_WIRELESS_SETTINGS)); } dialog.cancel(); } }) .setNegativeButton("否", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.cancel(); } }).show(); }else{ if (!dialog_networkSettings.isShowing()) { dialog_networkSettings.show(); } } }

意义就在于对自身的项目需求做出特殊的代码比方我碰到的之前一个项目他后台是thinkphp的所以參数都是：网址+/？a=** 特殊情况做出处理
还有就是比方用户信息请求得同一时候能够在自己写的二次封装方法中写很多其它的针对这一个api的操作比方 db操作甚至关系的推断等
我封装的一个 BaseAdapter

package yangdc.common.fragment.base; import org.json.JSONException; import org.json.JSONObject; import yangdc.common.api.ApiCallBack; import yangdc.common.utils.BitmapUtil; import yangdc.common.utils.StringUtils; import yangdc.common.utils.ToastUtils; import com.handmark.pulltorefresh.library.PullToRefreshBase; import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode; import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener; import com.handmark.pulltorefresh.library.PullToRefreshListView; import com.lidroid.xutils.bitmap.PauseOnScrollListener; import android.content.Context; import android.content.SharedPreferences; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ArrayAdapter; import android.widget.ListView; public abstract class BaseAdapter< EntityT, ViewT> extends ArrayAdapter< EntityT> { public Context context; int resource; public ApiCallBack api; public int page = 0; ListView listView; public BitmapUtil bitmapUtil; boolean mHasRequestedMore; // 正在请求 public boolean isDropDown = true; // 是否是刷新 PullToRefreshListView pullToRefreshListView; public BaseAdapter(Context context,int resource,PullToRefreshListView pullToRefreshListView) { super(context, resource); this.pullToRefreshListView = pullToRefreshListView; init(context, resource); } public BaseAdapter(Context context, int resource, ListView listView) { super(context, resource); this.listView = listView; init(context, resource); } public void init(Context context, int resource){ this.context = context; this.resource = resource; initAdapter(); initbitmapUtil(); initListViewListener(); } public void initAdapter(){ if (listView != null) { listView.setAdapter(this); } else if (pullToRefreshListView != null) { pullToRefreshListView.setAdapter(this); } } public void initbitmapUtil() {bitmapUtil = new BitmapUtil(context); // 控制滑动和高速滑动过程中时候暂停载入图片 if (listView != null) { listView.setOnScrollListener(new PauseOnScrollListener(bitmapUtil,false, true)); listView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView< ? > parent, View view, int position, long id) { OnItemClick(getItem(position-1)); } }); } else if (pullToRefreshListView != null) { pullToRefreshListView.setOnScrollListener(new PauseOnScrollListener(bitmapUtil,false, true)); pullToRefreshListView.setOnItemClickListener(new OnItemClickListener() {@Override public void onItemClick(AdapterView< ?> parent, View view, int position, long id) { OnItemClick(getItem(position-1)); } }); } } public void OnItemClick(EntityT T){} public void initListViewListener() { if (pullToRefreshListView != null) { pullToRefreshListView.setMode(Mode.BOTH); pullToRefreshListView.setOnRefreshListener(new OnRefreshListener< ListView> () { @Override public void onRefresh(PullToRefreshBase< ListView> refreshView) { if (refreshView.isHeaderShown()) { isDropDown = true; } else { isDropDown = false; } onLoadMoreItems(); } }); } if (onLoadMoreImmediately()) { onLoadMoreItems(); } } public boolean onLoadMoreImmediately() { return true; } private void complete(){ mHasRequestedMore = false; if (pullToRefreshListView != null) { pullToRefreshListView.onRefreshComplete(); } } public void onLoadMoreItems() { if (mHasRequestedMore) { // 上次请求还未结束 ToastUtils.show(context, "正在努力载入中..."); } else { final int oldPage = page; if (isDropDown) { page = 1; } else { page++; } if (api == null) { api = new ApiCallBack() { @Override public void onSuccessJson(JSONObject jsonObject) { complete(); if (page == 1) { saveCache(jsonObject); clear(); //TODO 推断是否有新数据假设是仅仅新增则加入到头部其它情况加入到尾部 } BaseAdapter.this.onSuccessJson(jsonObject); } @Override public void onFailure(Exception e, String msg) { complete(); mHasRequestedMore = false; ToastUtils.show(context, msg); page = oldPage; } @Override public void onReady() { if (page==1) { JSONObject result = loadJSONCache(); if (result != null) { onSuccessJson(result); } } } }; } mHasRequestedMore = true; PostObjs(); } }public void onSuccess(String result){ try { onSuccessJson(new JSONObject(result)); } catch (JSONException e) { e.printStackTrace(); } } public abstract void onSuccessJson(JSONObject result); publicString URL(){ return null; }public String PostActionMark(){ return api.jsonAction; }public abstract void PostObjs(); public abstract ViewT initView(View convertView); public abstract void updateView(ViewT convertView, EntityT entity); public SharedPreferences getSharedPreferences(){ return context.getSharedPreferences( getClass().getName() , Context.MODE_PRIVATE); } public void saveCache(String cacheStr){ getSharedPreferences().edit().putString(PostActionMark(), cacheStr).commit(); } public void saveCache(JSONObject cacheJson){ saveCache(cacheJson.toString()); } public String loadCache(){ SharedPreferences preferences = getSharedPreferences(); return preferences.getString(PostActionMark(), ""); } public JSONObject loadJSONCache() { String jsonStr = loadCache(); JSONObject jsonObject = null; if (!StringUtils.isEmpty(jsonStr)) { try { jsonObject = new JSONObject(jsonStr); } catch (JSONException e) { e.printStackTrace(); } } return jsonObject; }@SuppressWarnings("unchecked") @Override public View getView(int position, View convertView, ViewGroup parent) { ViewT adapterView = null; if (convertView == null) { convertView = LayoutInflater.from(getContext()).inflate(resource, null); adapterView = initView(convertView); convertView.setTag(adapterView); } else { adapterView = (ViewT) convertView.getTag(); } updateView(adapterView, getItem(position)); return convertView; }}

继承后自须要实现几个方法就可以

文章图片

基本代码意思是
翻页、第一页的缓存、等通用的都让baseclass处理
继承后仅仅须要实现
网络请求时须要的数据、view的初始化以及刷新的内容（会自己主动调用）、以及其它格外处理比方Item点击事件
能用Fragment 的使用Fragment 碎片化谁让老板常改需求呢你懂得
不使用v4包内的fragment 而想使用 v4包的ViewPager
FragmentStatePagerAdapter

/* * Copyright (C) 2011 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * *http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */package yangdc.common.fragment.base; import android.app.Fragment; import android.app.FragmentManager; import android.app.FragmentTransaction; import android.os.Parcelable; import android.support.v4.view.PagerAdapter; import android.util.Log; import android.view.View; import android.view.ViewGroup; /** * Implementation of {@link android.support.v4.view.PagerAdapter} that * represents each page as a {@link Fragment} that is persistently * kept in the fragment manager as long as the user can return to the page. * * This version of the pager is best for use when there are a handful of * typically more static fragments to be paged through, such as a set of tabs. * The fragment of each page the user visits will be kept in memory, though its * view hierarchy may be destroyed when not visible.This can result in using * a significant amount of memory since fragment instances can hold on to an * arbitrary amount of state.For larger sets of pages, consider * {@link FragmentStatePagerAdapter}. * * When using FragmentPagerAdapter the host ViewPager must have a * valid ID set. * * Subclasses only need to implement {@link #getItem(int)} * and {@link #getCount()} to have a working adapter. * * Here is an example implementation of a pager containing fragments of * lists: * * {@sample development/samples/Support4Demos/src/com/example/android/supportv4/app/FragmentPagerSupport.java *complete} * * The < code> R.layout.fragment_pager< /code> resource of the top-level fragment is: * * {@sample development/samples/Support4Demos/res/layout/fragment_pager.xml *complete} * * The < code> R.layout.fragment_pager_list< /code> resource containing each * individual fragment‘s layout is: * * {@sample development/samples/Support4Demos/res/layout/fragment_pager_list.xml *complete} */ public abstract class FragmentPagerAdapter extends PagerAdapter { private static final String TAG = "FragmentPagerAdapter"; private static final boolean DEBUG = false; private final FragmentManager mFragmentManager; private FragmentTransaction mCurTransaction = null; private Fragment mCurrentPrimaryItem = null; public FragmentPagerAdapter(FragmentManager fm) { mFragmentManager = fm; }/** * Return the Fragment associated with a specified position. */ public abstract Fragment getItem(int position); @Override public void startUpdate(ViewGroup container) { }@Override public Object instantiateItem(ViewGroup container, int position) { if (mCurTransaction == null) { mCurTransaction = mFragmentManager.beginTransaction(); }final long itemId = getItemId(position); // Do we already have this fragment? String name = makeFragmentName(container.getId(), itemId); Fragment fragment = mFragmentManager.findFragmentByTag(name); if (fragment != null) { if (DEBUG) Log.v(TAG, "Attaching item #" + itemId + ": f=" + fragment); mCurTransaction.attach(fragment); } else { fragment = getItem(position); if (DEBUG) Log.v(TAG, "Adding item #" + itemId + ": f=" + fragment); mCurTransaction.add(container.getId(), fragment, makeFragmentName(container.getId(), itemId)); } if (fragment != mCurrentPrimaryItem) { fragment.setMenuVisibility(false); fragment.setUserVisibleHint(false); }return fragment; }@Override public void destroyItem(ViewGroup container, int position, Object object) { if (mCurTransaction == null) { mCurTransaction = mFragmentManager.beginTransaction(); } if (DEBUG) Log.v(TAG, "Detaching item #" + getItemId(position) + ": f=" + object + " v=" + ((Fragment)object).getView()); mCurTransaction.detach((Fragment)object); }@Override public void setPrimaryItem(ViewGroup container, int position, Object object) { Fragment fragment = (Fragment)object; if (fragment != mCurrentPrimaryItem) { if (mCurrentPrimaryItem != null) { mCurrentPrimaryItem.setMenuVisibility(false); mCurrentPrimaryItem.setUserVisibleHint(false); } if (fragment != null) { fragment.setMenuVisibility(true); fragment.setUserVisibleHint(true); } mCurrentPrimaryItem = fragment; } }@Override public void finishUpdate(ViewGroup container) { if (mCurTransaction != null) { mCurTransaction.commitAllowingStateLoss(); mCurTransaction = null; mFragmentManager.executePendingTransactions(); } }@Override public boolean isViewFromObject(View view, Object object) { return ((Fragment)object).getView() == view; }@Override public Parcelable saveState() { return null; }@Override public void restoreState(Parcelable state, ClassLoader loader) { }/** * Return a unique identifier for the item at the given position. * * The default implementation returns the given position. * Subclasses should override this method if the positions of items can change. * * @param position Position within this adapter * @return Unique identifier for the item at position */ public long getItemId(int position) { return position; }private static String makeFragmentName(int viewId, long id) { return "android:switcher:" + viewId + ":" + id; } } /* * Copyright (C) 2011 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * *http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */package yangdc.common.fragment.base; import java.util.ArrayList; import android.app.Fragment; import android.app.FragmentManager; import android.app.FragmentTransaction; import android.os.Bundle; import android.os.Parcelable; import android.support.v4.view.PagerAdapter; import android.util.Log; import android.view.View; import android.view.ViewGroup; /** * Implementation of {@link android.support.v4.view.PagerAdapter} that * uses a {@link Fragment} to manage each page. This class also handles * saving and restoring of fragment‘s state. * * This version of the pager is more useful when there are a large number * of pages, working more like a list view.When pages are not visible to * the user, their entire fragment may be destroyed, only keeping the saved * state of that fragment.This allows the pager to hold on to much less * memory associated with each visited page as compared to * {@link FragmentPagerAdapter} at the cost of potentially more overhead when * switching between pages. * * When using FragmentPagerAdapter the host ViewPager must have a * valid ID set. * * Subclasses only need to implement {@link #getItem(int)} * and {@link #getCount()} to have a working adapter. * * Here is an example implementation of a pager containing fragments of * lists: * * {@sample development/samples/Support13Demos/src/com/example/android/supportv13/app/FragmentStatePagerSupport.java *complete} * * The < code> R.layout.fragment_pager< /code> resource of the top-level fragment is: * * {@sample development/samples/Support13Demos/res/layout/fragment_pager.xml *complete} * * The < code> R.layout.fragment_pager_list< /code> resource containing each * individual fragment‘s layout is: * * {@sample development/samples/Support13Demos/res/layout/fragment_pager_list.xml *complete} */ public abstract class FragmentStatePagerAdapter extends PagerAdapter { private static final String TAG = "FragmentStatePagerAdapter"; private static final boolean DEBUG = false; private final FragmentManager mFragmentManager; private FragmentTransaction mCurTransaction = null; private ArrayList< Fragment.SavedState> mSavedState = new ArrayList< Fragment.SavedState> (); private ArrayList< Fragment> mFragments = new ArrayList< Fragment> (); private Fragment mCurrentPrimaryItem = null; public FragmentStatePagerAdapter(FragmentManager fm) { mFragmentManager = fm; }/** * Return the Fragment associated with a specified position. */ public abstract Fragment getItem(int position); @Override public void startUpdate(ViewGroup container) { }@Override public Object instantiateItem(ViewGroup container, int position) { // If we already have this item instantiated, there is nothing // to do.This can happen when we are restoring the entire pager // from its saved state, where the fragment manager has already // taken care of restoring the fragments we previously had instantiated. if (mFragments.size() > position) { Fragment f = mFragments.get(position); if (f != null) { return f; } }if (mCurTransaction == null) { mCurTransaction = mFragmentManager.beginTransaction(); }Fragment fragment = getItem(position); if (DEBUG) Log.v(TAG, "Adding item #" + position + ": f=" + fragment); if (mSavedState.size() > position) { Fragment.SavedState fss = mSavedState.get(position); if (fss != null) { fragment.setInitialSavedState(fss); } } while (mFragments.size() < = position) { mFragments.add(null); } fragment.setMenuVisibility(false); fragment.setUserVisibleHint(false); mFragments.set(position, fragment); mCurTransaction.add(container.getId(), fragment); return fragment; }@Override public void destroyItem(ViewGroup container, int position, Object object) { Fragment fragment = (Fragment)object; if (mCurTransaction == null) { mCurTransaction = mFragmentManager.beginTransaction(); } if (DEBUG) Log.v(TAG, "Removing item #" + position + ": f=" + object + " v=" + ((Fragment)object).getView()); while (mSavedState.size() < = position) { mSavedState.add(null); } mSavedState.set(position, mFragmentManager.saveFragmentInstanceState(fragment)); mFragments.set(position, null); mCurTransaction.remove(fragment); }@Override public void setPrimaryItem(ViewGroup container, int position, Object object) { Fragment fragment = (Fragment)object; if (fragment != mCurrentPrimaryItem) { if (mCurrentPrimaryItem != null) { mCurrentPrimaryItem.setMenuVisibility(false); mCurrentPrimaryItem.setUserVisibleHint(false); } if (fragment != null) { fragment.setMenuVisibility(true); fragment.setUserVisibleHint(true); } mCurrentPrimaryItem = fragment; } }@Override public void finishUpdate(ViewGroup container) { if (mCurTransaction != null) { mCurTransaction.commitAllowingStateLoss(); mCurTransaction = null; mFragmentManager.executePendingTransactions(); } }@Override public boolean isViewFromObject(View view, Object object) { return ((Fragment)object).getView() == view; }@Override public Parcelable saveState() { Bundle state = null; if (mSavedState.size() > 0) { state = new Bundle(); Fragment.SavedState[] fss = new Fragment.SavedState[mSavedState.size()]; mSavedState.toArray(fss); state.putParcelableArray("states", fss); } for (int i=0; i< mFragments.size(); i++) { Fragment f = mFragments.get(i); if (f != null) { if (state == null) { state = new Bundle(); } String key = "f" + i; mFragmentManager.putFragment(state, key, f); } } return state; }@Override public void restoreState(Parcelable state, ClassLoader loader) { if (state != null) { Bundle bundle = (Bundle)state; bundle.setClassLoader(loader); Parcelable[] fss = bundle.getParcelableArray("states"); mSavedState.clear(); mFragments.clear(); if (fss != null) { for (int i=0; i< fss.length; i++) { mSavedState.add((Fragment.SavedState)fss[i]); } } Iterable< String> keys = bundle.keySet(); for (String key: keys) { if (key.startsWith("f")) { int index = Integer.parseInt(key.substring(1)); Fragment f = mFragmentManager.getFragment(bundle, key); if (f != null) { while (mFragments.size() < = index) { mFragments.add(null); } f.setMenuVisibility(false); mFragments.set(index, f); } else { Log.w(TAG, "Bad fragment at key " + key); } } } } } }

BitmapUtils 二次封装主要是有部分url 没有http部分做少许处理

package yangdc.common.utils; import yangdc.common.AppContext; import yangdc.common.Constants; import yangdc.common.R; import android.content.Context; import android.widget.ImageView; import com.lidroid.xutils.BitmapUtils; import com.lidroid.xutils.bitmap.BitmapDisplayConfig; import com.lidroid.xutils.bitmap.core.BitmapSize; public class BitmapUtil extends BitmapUtils{static BitmapDisplayConfig bitmapDisplayConfig = getBitmapDisplayConfig(); public BitmapUtil(Context context) { this(context, null); } public static BitmapDisplayConfig getBitmapDisplayConfig() { if (bitmapDisplayConfig == null) { bitmapDisplayConfig = new BitmapDisplayConfig(); bitmapDisplayConfig.setLoadingDrawable(AppContext.getContext().getResources().getDrawable(R.drawable.image_loading)); bitmapDisplayConfig.setLoadFailedDrawable(AppContext.getContext().getResources().getDrawable(R.drawable.image_fail)); } return bitmapDisplayConfig; } public BitmapUtil(Context context, String diskCachePath) { super(context, diskCachePath); } public void display(ImageView imageView,String url){ imageView.setImageResource(R.drawable.empty_photo); if (StringUtils.isEmpty(url)) { return; } if (!url.startsWith("http")) { url = Constants.image_url +"/"+ url; } //BitmapSize bitmapSize = new BitmapSize(imageView.getLayoutParams().width, imageView.getLayoutParams().height); //bitmapDisplayConfig.setBitmapMaxSize(bitmapSize); super.display(imageView, url ,bitmapDisplayConfig); } }

好了去吃中午饭了。。。。
【代码二次封装-xUtils（android）】。