android自定義控件實例

               很多時候android常用的控件不能滿足我們的需求，那么我們就需要自定義一個控件了。今天做了一個自定義控件的實例，來分享下。

              首先定義一個layout實現按鈕內部布局：

<?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="horizontal" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:paddingBottom="5dip"
        android:paddingLeft="40dip"
        android:paddingTop="5dip"
        android:src="@drawable/right_icon" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:layout_marginLeft="8dip"
        android:text="確定"
        android:textColor="#000000" />

</LinearLayout>

public class ImageBtn extends LinearLayout {

    private ImageView imageView;
    private TextView  textView;

    public ImageBtn(Context context) {
        super(context);
        // TODO Auto-generated constructor stub
    }
    public ImageBtn(Context context, AttributeSet attrs) {
        super(context, attrs);
        // TODO Auto-generated constructor stub
        LayoutInflater inflater=(LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        inflater.inflate(R.layout.imagebtn, this);
        imageView=(ImageView) findViewById(R.id.imageView1);
        textView=(TextView)findViewById(R.id.textView1);
    }

    /** 
     * 設置圖片資源 
     */  
    public void setImageResource(int resId) {  
        imageView.setImageResource(resId);  
    }  

    /** 
     * 設置顯示的文字 
     */  
    public void setTextViewText(String text) {  
        textView.setText(text);  
    }  

}

<?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="horizontal" >

    <cn.com.karl.view.ImageBtn
        android:id="@+id/btn_right"
        android:layout_height="wrap_content"  
        android:layout_width="wrap_content"
        android:background="@drawable/btn"  
        />

    <cn.com.karl.view.ImageBtn
        android:id="@+id/btn_error"
        android:layout_marginLeft="5dp"
        android:layout_height="wrap_content"  
        android:layout_width="wrap_content"
        android:background="@drawable/btn"  
        />

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >

    <item android:state_focused="true" android:state_pressed="false" android:drawable="@drawable/btn_normal"></item>
    <item android:state_pressed="true" android:drawable="@drawable/btn_white"></item>
    <item android:state_checked="true" android:drawable="@drawable/btn_white"></item>
    <item android:state_focused="false" android:state_pressed="false" android:drawable="@drawable/btn_normal"></item>

</selector>

public class IdentifyButtonActivity extends Activity {
   private ImageBtn imageBtn1;
   private ImageBtn imageBtn2;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.identifybutton);

        imageBtn1=(ImageBtn) this.findViewById(R.id.btn_right);
        imageBtn2=(ImageBtn) this.findViewById(R.id.btn_error);
        imageBtn1.setTextViewText("確定");
        imageBtn2.setTextViewText("取消");
        imageBtn1.setImageResource(R.drawable.right_icon);
        imageBtn2.setImageResource(R.drawable.error_icon);

        imageBtn1.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub
                Toast.makeText(getApplicationContext(), "點擊的正確按鈕", 1).show();
            }
        });

        imageBtn2.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub
                Toast.makeText(getApplicationContext(), "點擊的錯誤按鈕", 1).show();
            }
        });
    }
}