Activity继承BaseActivity的使用（使用相同布局）

相信在android应用开发中有不少的相同布局，这时候当然你可以对于每个Activity去设置不同的xml，可是有相同的xml布局怎么办呢，再写一遍其不是很浪费时间，这时候我们可以写一个基类用来处理相同的布局部分！详见如下：

1.BaseActivity代码部分：

package com.example.com.test.test1;import android.app.Activity;import android.content.Context;import android.content.Intent;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.view.Window;import android.widget.Button;import android.widget.ImageButton;import android.widget.LinearLayout;import android.widget.TextView;public class BaseActivity extends Activity {//共用的声明部分private TextView head_tv;private ImageButton imageButton_exit;//声明分配布局的layoutID,如果分配的是RelativeLayout,也可以，根据自己需求来换private LinearLayout llcontent;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);//去掉系统的TitleBarthis.getWindow().requestFeature(Window.FEATURE_NO_TITLE);setContentView(R.layout.base);}//初始化public void BaseInit(){head_tv =(TextView)findViewById(R.id.header_tv);imageButton_exit = (ImageButton)findViewById(R.id.imageButton_exit);}//  设置要显示的布局方法public void BaseSetContentView(int layoutID){llcontent = (LinearLayout)findViewById(R.id.llcontent);//获得inflaterLayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);//把继承该BaseAcitivyt的layoutID放进来 显示View view = inflater.inflate(layoutID, null);//addviewllcontent.addView(view);}//  设置要下一个显示的布局public void BaseSetContentView_other(int layoutID){llcontent = (LinearLayout)findViewById(R.id.llcontent_other);//获得inflaterLayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);//把继承该BaseAcitivyt的layoutID放进来 显示View view = inflater.inflate(layoutID, null);//addviewllcontent.addView(view);}//  获得head_tvpublic TextView getHead_tv(){return head_tv;}//设置TitleBar的textview-----public void setHead_tv(String text){head_tv.setText(text);}//获得exit按钮public ImageButton getExit(){return imageButton_exit;}//返回上一个Activity的方法public void backIntent(final Context context,final Class<?> toClass){imageButton_exit.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {Intent intent = new Intent();intent.setClass(context, toClass);startActivity(intent);finish();}});}}

对应的base XML布局：

<pre name="code" class="html"><?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:background="#FFFFFF"    android:orientation="horizontal" >    <RelativeLayout        android:id="@+id/frameLayout1"        android:layout_width="fill_parent"        android:layout_height="40dp"        android:background="@drawable/top_bar_bg"        android:gravity="center_vertical"        android:orientation="horizontal" >             <ImageButton            android:id="@+id/imageButton_exit"            android:layout_width="30dp"            android:layout_height="40dp"            android:layout_alignParentRight="true"            android:layout_alignParentTop="true"            android:layout_margin="5dp"            android:background="@drawable/closed_press"           />        <TextView            android:id="@+id/header_tv"            android:layout_width="fill_parent"            android:layout_height="40dp"            android:layout_alignParentTop="true"            android:layout_marginRight="45dp"            android:layout_toRightOf="@+id/imageButton_mainMenu"            android:gravity="center"            android:textColor="#008AE0"            android:textSize="15dp"             android:text="共用的TitleBar"/>        <View            android:id="@+id/view1"            android:layout_width="1dp"            android:layout_height="40dp"            android:layout_alignParentTop="true"            android:layout_toLeftOf="@+id/imageButton_exit"            android:background="#000000" />        </RelativeLayout>        <!-- 为下个布局分配空间 -->        <LinearLayout             android:id="@+id/llcontent"            android:layout_width="fill_parent"            android:layout_height="wrap_content"            android:layout_centerInParent="true"            android:gravity="center_horizontal"            >        </LinearLayout>        <!-- 为下个不同分布的布局分配空间，可以满足你不同的布局需求 -->        <LinearLayout             android:id="@+id/llcontent_other"            android:layout_width="fill_parent"            android:layout_height="wrap_content"            android:layout_marginTop="100dp"            ></LinearLayout>        </RelativeLayout></pre><br><pre></pre><p>2.MainActivity:</p><p></p><pre name="code" class="java">package com.example.com.test.test1;import android.app.AlertDialog;import android.content.DialogInterface;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.view.Window;import android.widget.Button;public class MainActivity extends BaseActivity {//声明activity_main XML中的控件private Button firstbtn,secondbtn;private final int FIRST = 0;private final int SECOND = 1;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);      //      调用父类方法显示view        BaseSetContentView(R.layout.activity_main);        LocalInit();    }//  初始化    private void LocalInit(){    BaseInit();    firstbtn = (Button)findViewById(R.id.first_btn);    secondbtn = (Button)findViewById(R.id.second_btn);//    调用基类的sethead_tv和exit()    setHead_tv("这是MainActivity！");//    获得基类按钮并监听        getExit().setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {AlertDialog.Builder dialog = new AlertDialog.Builder(MainActivity.this);dialog.setTitle("提示：");dialog.setMessage("退出程序？");dialog.setCancelable(false);dialog.setPositiveButton("Y", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {finish();System.exit(0);}}).setNegativeButton("N", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.cancel();}}).show();}});        firstbtn.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {Intent intent = new Intent();intent.setClass(MainActivity.this, IntentActivity.class);intent.putExtra("option",FIRST);startActivity(intent);finish();}});        secondbtn.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {Intent intent = new Intent();intent.setClass(MainActivity.this, IntentActivity.class);intent.putExtra("option",SECOND);startActivity(intent);finish();}});    }}</pre>activity_main XML布局：<p></p><p></p><pre name="code" class="html"><?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical"    >    <Button android:id="@+id/first_btn"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="跳转ButtonActivity"/><Button android:id="@+id/second_btn"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="跳转TextViewActivity"/></LinearLayout></pre><br>3.IntentActivity:<p></p><p></p><pre name="code" class="java">package com.example.com.test.test1;import android.os.Bundle;public class IntentActivity extends BaseActivity {//  接收MainActivity的传值private int option;private final int FIRST = 0;private final int SECOND = 1;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);getActivity();}// 初始化private void LocalInit(){BaseInit();//调用BaseActivity中exit按钮返回的方法backIntent(IntentActivity.this, MainActivity.class);}private void getActivity(){//接收传值Bundle bundle = getIntent().getExtras();option = bundle.getInt("option");switch(option){case FIRST://显示一种布局BaseSetContentView_other(R.layout.button);LocalInit();setHead_tv("显示ButtonActivity！");break;case SECOND://显示令一种布局BaseSetContentView_other(R.layout.textview);LocalInit();setHead_tv("显示TextViewActivity!");break;}}}</pre><br>对应的button,textview布局：<p></p><p></p><pre name="code" class="html"><?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical"    >    <Button android:id="@+id/first_btn"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="我是按钮Acitivity"/><Button android:id="@+id/second_btn"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="返回请点击TitleBar返回按钮"/><Button android:id="@+id/three_btn"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="我是按钮Acitivity"/><Button android:id="@+id/four_btn"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="返回请点击TitleBar返回按钮"/></LinearLayout></pre><br><pre name="code" class="html"><?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:orientation="vertical" >    <TextView android:id="@+id/textview"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="TextViewActivity,返回请点击TitleBar返回按钮!同时对比下各Activity的布局情况"    android:textSize="15sp"    android:textColor="#008ae0"/><Button android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="注意体会布局"/></LinearLayout></pre><pre></pre><pre></pre>