标签：封装
通常我们会引用许多lib
并且会出现lib 与我们的功能只差一点点 这样的情况我们最好不要去修改源码 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
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 其他 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 = 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("本软件需要使用网络资源，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 做出特殊的代码比如 我碰到的之前一个项目 他后台是thinkPHP的所以参数都是：网址+/？a=** 特殊情况做出处理
还有就是比如用户信息 请求得同时可以在 自己写的二次封装方法中写 更多的针对这一个api的操作 比如 db操作甚至关系的判断等
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);
// 控制滑动和快速滑动过程中时候暂停加载图片
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, "正在努力加载中...");
} 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 判断是否 有新数据 如果是只新增则 添加到头部 其他情况添加到尾部
}
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);
public String 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;
}
}
继承后自需要实现几个方法即可
基本代码意思是
翻页、第一页的缓存、等通用的都让baseclass处理
继承后只需要实现
网络请求时需要的数据、view的初始化以及刷新的内容（会自动调用）、以及其他格外处理比如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.
*
* <p>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}.
*
* <p>When using FragmentPagerAdapter the host ViewPager must have a
* valid ID set.</p>
*
* <p>Subclasses only need to implement {@link #getItem(int)}
* and {@link #getCount()} to have a working adapter.
*
* <p>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}
*
* <p>The <code>R.layout.fragment_pager</code> resource of the top-level fragment is:
*
* {@sample development/samples/Support4Demos/res/layout/fragment_pager.xml
* complete}
*
* <p>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.
*
* <p>The default implementation returns the given position.
* Subclasses should override this method if the positions of items can change.</p>
*
* @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.
*
* <p>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.
*
* <p>When using FragmentPagerAdapter the host ViewPager must have a
* valid ID set.</p>
*
* <p>Subclasses only need to implement {@link #getItem(int)}
* and {@link #getCount()} to have a working adapter.
*
* <p>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}
*
* <p>The <code>R.layout.fragment_pager</code> resource of the top-level fragment is:
*
* {@sample development/samples/Support13Demos/res/layout/fragment_pager.xml
* complete}
*
* <p>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。。。。。
版权声明：本文为博主原创文章，未经博主允许不得转载。
标签：封装
原文地址：http://blog.csdn.net/ydc__/article/details/46891361
