TextView点击效果(Button)

TextView点击效果

演示的是一个用TextView来定义的一个Button,实现类似TabWidget风格的选项卡。
自定义按钮,这里没有通过Button类或者子类去做派生,而是通过TextView派生出来的。
在这里三个按钮是三个TextView派生类实例,中间的白线,是1px宽的白色矩形,这样就可以做出类似上面的效果。

效果图:
[img]
TextView点击效果(Button)
[/img]

工程结构图:
[img]
TextView点击效果(Button)
[/img]

/res/drawable/background_color.xml  用shape标签自定义一个渐变背景
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
    <gradient 
        android:startColor="#FFFFFFFF"
        android:endColor="#FFFFFFFF"
        android:angle="270.0"
        android:centerY="0.3"
        android:centerColor="#FFBDBDBD"
        />
</shape>


res/drawable/button_selector.xml
<?xml version="1.0" encoding="utf-8"?>
<selector
	xmlns:android="http://schemas.android.com/apk/res/android"
	android:constantSize="true">
	<!-- 获得焦点时的背景图片 -->
	<item
		android:state_focused="true">
		<shape>
			<gradient
				android:startColor="#FFE5CF33"
				android:endColor="#FFF1E7A2"
				android:angle="90.0" />
		</shape>
	</item>
	<!-- 设置相应所有事件 -->
	<item
		android:state_enabled="true"
		android:state_pressed="false">
		<shape>
			<gradient
				android:startColor="#FF1B1B1B"
				android:endColor="#FF969696"
				android:angle="90.0" />
		</shape>
	</item>
	<!-- 按钮点击时的背景 -->
	<item
		android:state_enabled="true"
		android:state_pressed="true">
		<shape>
			<gradient
				android:startColor="#FF000000"
				android:endColor="#FF474747"
				android:angle="90.0" />
		</shape>
	</item>
	<item
		android:state_enabled="false"
		android:state_pressed="true">
		<shape>
			<gradient
				android:startColor="#FF000000"
				android:endColor="#FF474747"
				android:angle="90.0" />
		</shape>
	</item>
	<!-- 默认情况下的背景 -->
	<item>
		<shape>
			<gradient
				android:startColor="#FF000000"
				android:endColor="#FF474747"
				android:angle="90.0" />
		</shape>
	</item>
</selector>



res/layout/main.xml,这个是主布局,由自定义的Button和1px的白色矩形组成
<?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:background="@drawable/background_color"
	android:orientation="vertical">

	<LinearLayout
		android:layout_width="fill_parent"
		android:layout_height="10dip" />
	<LinearLayout
		android:layout_width="fill_parent"
		android:layout_height="40dip">
		<com.amaker.testbutton.TextButton
			android:layout_width="fill_parent"
			android:layout_height="fill_parent"
			android:layout_weight="1"
			android:text="饮食"
			android:gravity="center"
			android:background="@drawable/button_selector"
			android:focusable="true"
			android:clickable="true" />
		<View
			android:layout_width="2px"
			android:layout_height="fill_parent"
			android:background="#FFFFFFFF" />
		<com.amaker.testbutton.TextButton
			android:layout_width="fill_parent"
			android:layout_height="fill_parent"
			android:layout_weight="1"
			android:text="旅行"
			android:gravity="center"
			android:background="@drawable/button_selector"
			android:focusable="true"
			android:clickable="true" />
		<View
			android:layout_width="2px"
			android:layout_height="fill_parent"
			android:background="#FFFFFFFF" />
		<com.amaker.testbutton.TextButton
			android:layout_width="fill_parent"
			android:layout_height="fill_parent"
			android:layout_weight="1"
			android:text="体育"
			android:gravity="center"
			android:background="@drawable/button_selector"
			android:focusable="true"
			android:clickable="true" />
	</LinearLayout>

</LinearLayout>


继承自TextView的自定义Button:
package com.amaker.testbutton;

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.TextView; 
import android.widget.Toast;

public class TextButton extends TextView {
    public TextButton(Context context)
    {
        super(context);
    }
    public TextButton(Context context, AttributeSet attrs, int defStyle)
    {
        super(context,attrs,defStyle);
    }
    public TextButton(final Context context, AttributeSet attrs)
    {
        this(context,attrs,0);
        this.setOnTouchListener(new OnTouchListener()
        {

            @Override
            public boolean onTouch(View v, MotionEvent event) {
                if(event.getAction()==MotionEvent.ACTION_CANCEL
                        ||event.getAction()==MotionEvent.ACTION_UP
                        ||event.getAction()==MotionEvent.ACTION_OUTSIDE)
                {
                    Toast.makeText(context, "hello", Toast.LENGTH_SHORT).show();
                }
                return false;
            }
            
        });
    }
}


主程序:
package com.amaker.testbutton;

import android.app.Activity;
import android.os.Bundle;

public class MainActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}

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