android自定义控件实例

               很多时候android常用的控件不能满足我们的需求，那么我们就需要自定义一个控件了。今天做了一个自定义控件的实例，来分享下。

              首先定义一个layout实现按钮内部布局：

<?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="确定"          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);   }      /**        * 设置图片资源        */        public void setImageResource(int resId) {            imageView.setImageResource(resId);        }            /**        * 设置显示的文字        */        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("确定");    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(), "点击的正确按钮", 1).show();     }    });              imageBtn2.setOnClickListener(new View.OnClickListener() {          public void onClick(View v) {      // TODO Auto-generated method stub      Toast.makeText(getApplicationContext(), "点击的错误按钮", 1).show();     }    });   }  }