Android技术15：自定义控件实现

 1 <LinearLayout
 2     xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="fill_parent" 
 4     android:layout_height="wrap_content"
 5     android:padding="10dip"
 6     android:orientation="horizontal">
 7     <ImageView 
 8         android:id="@+id/icon"
 9         android:layout_width="0dip"
10         android:layout_height="wrap_content"
11         android:layout_weight="1"
12         android:src="@drawable/icon"
13         android:layout_gravity="left|center_vertical"
14      />
15      <TextView 
16          android:id="@+id/text"
17          android:layout_width="0dip"
18          android:layout_height="wrap_content"
19          android:layout_weight="3"
20          android:layout_gravity="left|center_vertical"
21          android:textSize="18sp"
22          android:text="按钮文本"/>
23       <ImageView 
24         android:id="@+id/arrow"
25         android:layout_width="0dip"
26         android:layout_height="wrap_content"
27         android:layout_weight="1"
28         android:layout_gravity="center_vertical"
29         android:src="@drawable/arrow"
30      />
31 </LinearLayout>

 1 public class MyButton extends LinearLayout{
 2 
 3     private ImageView imgaeView;  //图标
 4     private TextView  textView;   //文字
 5     private ImageView arrow;      //箭头
 6     public MyButton(Context context) {
 7         super(context);
 8         
 9     }
10     public MyButton(Context context, AttributeSet attrs) {
11         super(context, attrs);
12         initView(context);
13     }
14     private void initView(Context context){
15         LayoutInflater inflater=(LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
16         LinearLayout linearLayout=(LinearLayout) inflater.inflate(R.layout.mybutton, this);
17         imgaeView=(ImageView)linearLayout.findViewById(R.id.icon);
18         textView=(TextView) linearLayout.findViewById(R.id.text);
19         arrow=(ImageView) linearLayout.findViewById(R.id.arrow);
20     }
21     //修改icon 
22     public void setImageViewResource(int resId){
23         imgaeView.setImageResource(resId);
24     }
25     //修改文本
26     public void setTextViewText(String text){
27         textView.setText(text);
28     }
29     
30     
31     
32 }

 <com.forsta.weight.MyButton 
        android:id="@+id/bt1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/bg"/>

1 <selector xmlns:android="http://schemas.android.com/apk/res/android">
2     <item android:state_pressed="true" android:drawable="@drawable/bg2"></item>
3     <item android:state_pressed="false" android:drawable="@drawable/bg1"></item>
4 </selector>

1 <shape xmlns:android="http://schemas.android.com/apk/res/android">
2     <gradient android:startColor="#FFFFFF"  android:endColor="#8DEEEE"/>
3 </shape>

1 <shape xmlns:android="http://schemas.android.com/apk/res/android">
2     <gradient android:startColor="#EEE685" android:endColor="#DDA0DD"></gradient>
3 </shape>