android中的代码重用 [英] Code reuse in android
问题描述
我在命名的first_activity和second_activity中有2个布局...
first_activity有一个按钮button1，我已经应用了onclick监听器来制作一个简单的toast，我已经使用了这个first_activity FirstActivity ...
second_activity只有一个按钮，我在second_activity中包含了first_activity，所以second_activity有2个按钮......
现在已经编码了使用FirstActivity运行应用程序有主要活动，我正在获得第一个按钮的totlick ...
现在，SecondActivity将FirstActivity扩展到它自己的按钮2点击事件......
现在我已经将启动活动更改为SecondActivity并且在运行之后我得到的第二个按钮的点击事件不是第一个按钮..
所以我在哪里犯错..
我的目的是使代码重用，例如我有一个应用程序，其中有30个布局，所有布局都有共同的菜单，包含在每个布局中，所以我只想为该菜单编码一次，并在所有其他布局中重用该代码...
这里是我的应用程序的代码。 ...
first_activity：
< relativelayout xmlns：android =http://schemas.android.com/apk/res/android>
xmlns：tools =http://schemas.android.com/tools
android：layout_width =match_parent
android：layout_height = 200dip
android：paddingBottom =@ dimen / activity_vertical_margin
android：paddingLeft =@ dimen / activity_horizontal_margin
android：paddingRight = @ dimen / activity_horizontal_margin
android：paddingTop =@ dimen / activity_vertical_margin
tools：context =。FirstActivity>
<按钮
android：id =@ + id / button1
android：layout_width =wrap_content
android：layout_height =wrap_content
android：t ext =第一个按钮/>
second_activity ：
< relativelayout xmlns：android =http://schemas.android.com/apk/res/android>
xmlns：tools =http： //schemas.android.com/tools
android：layout_width =match_parent
android：layout_height =match_parent
android： paddingBottom =@ dimen / activity_vertical_margin
android：paddingLeft =@ dimen / activity_horizontal_margin
android：paddingRight =@ dimen / activity_horizontal_margin
android：paddingTop =@ dimen / activity_vertical_margin
工具：context =。FirstActivity>
< include layout =@ layout / first_activity>
android：id =@ + id / layout/>
< Button
android：id =@ + id / button2
android：layout_width =wrap_content
android：layout_height =wr ap_content
android：layout_below =@ id / layout
android：text =2nd Button/>
FirstActivity：
package com.example.codereuse;
导入android.os.Bundle;
导入android.app.Activity;
导入android.view.Menu;
导入android.view.View;
导入android.view.View.OnClickListener;
导入android.widget.Button;
import android.widget.Toast;
公共类FirstActivity扩展活动{
Button b1;
@Override
protected void onCreate（Bundle savedInstanceState）{
super.onCreate（savedInstanceState） ;
setContentView（R.layout.first_activity）;
b1 =（按钮）findViewById（R.id.button1）;
b1.setOnClickListener（new OnClickListener（）{
@Override
public void onClick（查看v）{
// TODO自动生成方法存根
Toast.makeText（getApplicationContext （），按钮1单击，Toast.LENGTH_LONG）。show（）;
}
}）;
}
@Override
public boolean onCreateOptionsMenu（菜单菜单）{
//给菜单充气;如果它存在，这会将项目添加到操作栏。
getMenuInflater（）。inflate（R.menu.main，menu）;
返回true;
}
}
SecondActivity：
包com.example.codereuse;
导入android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android。 view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
公共类SecondActivity扩展FirstActivity {
按钮b2;
@Override
protected void onCreate（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）;
setContentView（R.layout.second_activity）;
b2 =（按钮）findViewById（R.id.button2）;
b2.setOnCli ckListener（新的OnClickListener（）{
@Override
public void onClick（查看v）{
/ / TODO自动生成的方法存根
Toast.makeText（getApplicationContext（），按钮2单击，Toast.LENGTH_LONG）。show（）;
}
}）;
}
@Override
public boolean onCreateOptionsMenu（菜单菜单） {
//给菜单充气;如果它存在，这会将项目添加到操作栏。
getMenuInflater（）。inflate（R.menu.main，menu）;
返回true;
}
}
AndroidMenifest：
< manifest xmlns：android =http://schemas.android.com/apk/res/android>
package = com.example.codereuse
android：versionCode =1
android：versionName =1.0>
< uses-sdk>
android：minSdkVersion =8
android：targetSdkVersion =17/>
< application>
android：allowBackup =true
android：icon =@ drawable / ic_launcher
android：label =@ string / app_name
android：theme =@ style / AppTheme>
< activity>
android：name =com.example.codereuse.SecondActivity
androi d：label =@ string / app_name>
< intent-filter>
< action android：name =android.intent.action.MAIN >
< category android：name =android.intent.category.LAUNCHER>
< activity>
android：name =com.example.codereuse.FirstActivity
android：label =@ string / app_name>
读者很快回复...
I have 2 layouts in named first_activity and second_activity...
the first_activity has a single button button1 on which i have applied onclick listener to make a simple toast and i have used this first_activity in the FirstActivity...
the second_activity has a single button along with that i have included the first_activity in the second_activity so the second_activity has 2 buttons...
now have coded and run the application using FirstActivity has the main activity and the i am getting the toast onclick of 1st button...
Now the SecondActivity extends FirstActivity along its own button 2 click event...
now i have changed the start activity as SecondActivity and after running i am getting the click event of only 2nd button not of 1st button..
so where i am making mistake..
my intention is to make code reuse for example i have an app in which there are 30 layout and all the layout have common menu which is included in each layout so i just want to code for that menu once and reuse that code in all the other layout...
here are the code of my app....
first_activity:
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android">
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="200dip"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".FirstActivity" >
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="1st Button" />
second_activity:
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android">
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".FirstActivity" >
<include layout="@layout/first_activity">
android:id="@+id/layout"/>
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/layout"
android:text="2nd Button" />
FirstActivity:
package com.example.codereuse;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class FirstActivity extends Activity {
Button b1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.first_activity);
b1 = (Button) findViewById(R.id.button1);
b1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), "Button 1 Clicked", Toast.LENGTH_LONG).show();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
SecondActivity:
package com.example.codereuse;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class SecondActivity extends FirstActivity {
Button b2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.second_activity);
b2 = (Button) findViewById(R.id.button2);
b2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), "Button 2 Clicked", Toast.LENGTH_LONG).show();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
AndroidMenifest:
<manifest xmlns:android="http://schemas.android.com/apk/res/android">
package="com.example.codereuse"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk>
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application>
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity>
android:name="com.example.codereuse.SecondActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN">
<category android:name="android.intent.category.LAUNCHER">
<activity>
android:name="com.example.codereuse.FirstActivity"
android:label="@string/app_name" >
Readers Reply very soon...
推荐答案
你好Ganeshcse ..
thanx回复..
i很遗憾地说，但你提供的链接对我不起作用..
你能给我更精确的解决方案..
我想要的是我有一个带有5个按钮的通用菜单所以我想制作一个单独的活动代码以便我可以使用所有其他活动中的代码，以便我不必一次又一次地重复该公共代码......
hello Ganeshcse..
thanx for reply..
i am sorry to say but the link that you have provided is not working for me..
can you give me more precise solution..
what i want is i have a common menu with 5 buttons so i want to make a separate activity code so that i can use that code in all other activity so that i dont have to repeat that common code again and again...
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