Fragment基类,Activity基类

这两天看了黑马程序员“新闻”项目，觉得BaseFragment写法不错。所以来贴代码的。

BaseFragment.java

<span style="font-size:14px;">package com.heima.news.base;import android.content.Context;import android.os.Bundle;import android.support.v4.app.Fragment;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import com.heima.news.MainActivity;import com.jeremyfeinstein.slidingmenu.lib.SlidingMenu;public abstract class BaseFragment extends Fragment {public View view;public Context ct;public SlidingMenu sm;@Overridepublic void onActivityCreated(Bundle savedInstanceState) {super.onActivityCreated(savedInstanceState);initData(savedInstanceState);}@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);ct = getActivity();sm = ((MainActivity) getActivity()).getSlidingMenu();}/** * setContentView; */@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {view = initView(inflater);return view;}public View getRootView() {return view;}/** * 初始化view */public abstract View initView(LayoutInflater inflater);/** * 初始化数据 */public abstract void initData(Bundle savedInstanceState);}</span>

子类：

<span style="font-size:14px;">package com.heima.news.fragment;public class HomeFragment extends BaseFragment {@Overridepublic View initView(LayoutInflater inflater) {view = inflater.inflate(R.layout.frag_home2, null);<span style="white-space:pre"></span>.......return view;}List<BasePage> list = new ArrayList<BasePage>();;@Overridepublic void initData(Bundle savedInstanceState) {.......}}</span>

子类实现了父类的抽象方法，省去了每次需要Override那几个生命周期方法，代码看起来更简洁。

新闻项目的下载链接：http://download.csdn.net/detail/yersterday/7900977

（需要说明的是代码只含有导航功能，没有具体模块的实现）。

下面Activity基类的代码是另一个项目的：

package com.immomo.momo.android;import java.util.ArrayList;import java.util.Iterator;import java.util.List;import android.app.AlertDialog;import android.content.DialogInterface;import android.content.Intent;import android.os.AsyncTask;import android.os.Bundle;import android.support.v4.app.FragmentActivity;import android.util.DisplayMetrics;import android.util.Log;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.widget.Toast;import com.immomo.momo.android.dialog.FlippingLoadingDialog;import com.immomo.momo.android.util.NetWorkUtils;import com.immomo.momo.android.view.HandyTextView;public abstract class BaseActivity extends FragmentActivity {//protected BaseApplication mApplication;//protected NetWorkUtils mNetWorkUtils;//protected FlippingLoadingDialog mLoadingDialog;/** * 屏幕的宽度、高度、密度 */protected int mScreenWidth;protected int mScreenHeight;protected float mDensity;protected List<AsyncTask<Void, Void, Boolean>> mAsyncTasks = new ArrayList<AsyncTask<Void, Void, Boolean>>();@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);//mApplication = (BaseApplication) getApplication();//mNetWorkUtils = new NetWorkUtils(this);//mLoadingDialog = new FlippingLoadingDialog(this, "请求提交中");DisplayMetrics metric = new DisplayMetrics();getWindowManager().getDefaultDisplay().getMetrics(metric);mScreenWidth = metric.widthPixels;mScreenHeight = metric.heightPixels;mDensity = metric.density;}@Overrideprotected void onDestroy() {clearAsyncTask();super.onDestroy();}/** 初始化视图 **/protected abstract void initViews();/** 初始化事件 **/protected abstract void initEvents();protected void putAsyncTask(AsyncTask<Void, Void, Boolean> asyncTask) {mAsyncTasks.add(asyncTask.execute());}protected void clearAsyncTask() {Iterator<AsyncTask<Void, Void, Boolean>> iterator = mAsyncTasks.iterator();while (iterator.hasNext()) {AsyncTask<Void, Void, Boolean> asyncTask = iterator.next();if (asyncTask != null && !asyncTask.isCancelled()) {asyncTask.cancel(true);}}mAsyncTasks.clear();}//protected void showLoadingDialog(String text) {//if (text != null) {//mLoadingDialog.setText(text);//}//mLoadingDialog.show();//}//protected void dismissLoadingDialog() {//if (mLoadingDialog.isShowing()) {//mLoadingDialog.dismiss();//}//}/** 短暂显示Toast提示(来自res) **/protected void showShortToast(int resId) {Toast.makeText(this, getString(resId), Toast.LENGTH_SHORT).show();}/** 短暂显示Toast提示(来自String) **/protected void showShortToast(String text) {Toast.makeText(this, text, Toast.LENGTH_SHORT).show();}/** 长时间显示Toast提示(来自res) **/protected void showLongToast(int resId) {Toast.makeText(this, getString(resId), Toast.LENGTH_LONG).show();}/** 长时间显示Toast提示(来自String) **/protected void showLongToast(String text) {Toast.makeText(this, text, Toast.LENGTH_LONG).show();}/** 显示自定义Toast提示(来自res) **/protected void showCustomToast(int resId) {View toastRoot = LayoutInflater.from(BaseActivity.this).inflate(R.layout.common_toast, null);((HandyTextView) toastRoot.findViewById(R.id.toast_text)).setText(getString(resId));Toast toast = new Toast(BaseActivity.this);toast.setGravity(Gravity.CENTER, 0, 0);toast.setDuration(Toast.LENGTH_SHORT);toast.setView(toastRoot);toast.show();}/** 显示自定义Toast提示(来自String) **/protected void showCustomToast(String text) {View toastRoot = LayoutInflater.from(BaseActivity.this).inflate(R.layout.common_toast, null);((HandyTextView) toastRoot.findViewById(R.id.toast_text)).setText(text);Toast toast = new Toast(BaseActivity.this);toast.setGravity(Gravity.CENTER, 0, 0);toast.setDuration(Toast.LENGTH_SHORT);toast.setView(toastRoot);toast.show();}/** Debug输出Log日志 **/protected void showLogDebug(String tag, String msg) {Log.d(tag, msg);}/** Error输出Log日志 **/protected void showLogError(String tag, String msg) {Log.e(tag, msg);}/** 通过Class跳转界面 **/protected void startActivity(Class<?> cls) {startActivity(cls, null);}/** 含有Bundle通过Class跳转界面 **/protected void startActivity(Class<?> cls, Bundle bundle) {Intent intent = new Intent();intent.setClass(this, cls);if (bundle != null) {intent.putExtras(bundle);}startActivity(intent);}/** 通过Action跳转界面 **/protected void startActivity(String action) {startActivity(action, null);}/** 含有Bundle通过Action跳转界面 **/protected void startActivity(String action, Bundle bundle) {Intent intent = new Intent();intent.setAction(action);if (bundle != null) {intent.putExtras(bundle);}startActivity(intent);}/** 含有标题和内容的对话框 **/protected AlertDialog showAlertDialog(String title, String message) {AlertDialog alertDialog = new AlertDialog.Builder(this).setTitle(title).setMessage(message).show();return alertDialog;}/** 含有标题、内容、两个按钮的对话框 **/protected AlertDialog showAlertDialog(String title, String message,String positiveText,DialogInterface.OnClickListener onPositiveClickListener,String negativeText,DialogInterface.OnClickListener onNegativeClickListener) {AlertDialog alertDialog = new AlertDialog.Builder(this).setTitle(title).setMessage(message).setPositiveButton(positiveText, onPositiveClickListener).setNegativeButton(negativeText, onNegativeClickListener).show();return alertDialog;}/** 含有标题、内容、图标、两个按钮的对话框 **/protected AlertDialog showAlertDialog(String title, String message,int icon, String positiveText,DialogInterface.OnClickListener onPositiveClickListener,String negativeText,DialogInterface.OnClickListener onNegativeClickListener) {AlertDialog alertDialog = new AlertDialog.Builder(this).setTitle(title).setMessage(message).setIcon(icon).setPositiveButton(positiveText, onPositiveClickListener).setNegativeButton(negativeText, onNegativeClickListener).show();return alertDialog;}/** 默认退出 **/protected void defaultFinish() {super.finish();}}