Activity继承BaseActivity的使用

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;
@Override
protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);
//		去掉系统的TitleBar
this.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inflater
LayoutInflater 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);
//		addview
llcontent.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inflater
LayoutInflater 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);
//		addview
llcontent.addView(view);
}
//  获得head_tv
public 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() {

@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.setClass(context, toClass);
startActivity(intent);
finish();
}
});
}

}

对应的base XML布局：

<?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>

2.MainActivity:

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() {

@Override
public 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() {

@Override
public void onClick(DialogInterface dialog, int which) {
finish();
System.exit(0);
}
}).setNegativeButton("N", new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
}).show();
}
});

firstbtn.setOnClickListener(new OnClickListener() {

@Override
public 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() {

@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.setClass(MainActivity.this, IntentActivity.class);
intent.putExtra("option",SECOND);
startActivity(intent);
finish();
}
});
}
}

activity_main XML布局：

<?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>

3.IntentActivity:

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;
@Override
protected 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;
}
}
}

对应的button,textview布局：

<?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>

<?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>