Android(安卓)创建复合控件

Android 创建复合控件

①自定义复合控件的布局：

clearable_edit_text.xml:

<? xmlversion="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 ="horizontal" >
< EditText
android:id ="@+id/editText"
android:layout_width ="200dp"
android:layout_height ="wrap_content"
/>
< Button
android:id ="@+id/clearButton"
android:layout_width ="100dp"
android:layout_height ="wrap_content"
android:text ="Clear"
/>
</ LinearLayout >

很简单，不废话

②选择适合放置子控件的布局类，并将其扩展

package com.yinger;

import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;

public class MyClearableEditText extends LinearLayout{

EditTexteditText;
ButtonclearButton;

public MyClearableEditText(Contextcontext,AttributeSetattrs){
super (context,attrs);
// TODOAuto-generatedconstructorstub
init();
hookupButton();
}

public MyClearableEditText(Contextcontext){
super (context);
init();
hookupButton();
}

private void init(){
StringinfService = Context.LAYOUT_INFLATER_SERVICE;
LayoutInflaterli;
li = (LayoutInflater)getContext().getSystemService(infService);
li.inflate(R.layout.clearable_edit_text, this , true );
editText = (EditText)findViewById(R.id.editText);
clearButton = (Button)findViewById(R.id.clearButton);
}

// privatevoidinit2(){
// setOrientation(LinearLayout.VERTICAL);
// editText=newEditText(getContext());
// clearButton=newButton(getContext());
// clearButton.setText("Clear");
// intlHeight=LayoutParams.WRAP_CONTENT;
// intlWidth=LayoutParams.FILL_PARENT;
//
// addView(editText,newLinearLayout.LayoutParams(lWidth,lHeight));
// addView(clearButton,newLinearLayout.LayoutParams(lWidth,lHeight));
// }

private void hookupButton(){
clearButton.setOnClickListener( new Button.OnClickListener(){

public void onClick(Viewv){
// TODOAuto-generatedmethodstub
editText.setText( "" );
}
});
}
}

③引用

<? xmlversion="1.0"encoding="utf-8" ?>
< LinearLayout xmlns:android ="http://schemas.android.com/apk/res/android"
android:orientation ="vertical"
android:layout_width ="fill_parent"
android:layout_height ="fill_parent"
>
< TextView
android:layout_width ="fill_parent"
android:layout_height ="wrap_content"
android:text ="@string/hello"
/>
< com .yinger.MyClearableEditText
android:layout_width ="fill_parent"
android:layout_height ="wrap_content"
/>
</ LinearLayout >

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