92 Android Style_Theme-优快云博客

本文介绍了一个简单的Android应用程序，展示了如何使用XML选择器为按钮的不同状态（如按下和聚焦）设置不同的颜色。通过MainActivity和button_selector_xml.xml文件，实现了按钮颜色在默认、聚焦及按下状态时的变化。

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activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="28dp"
        android:layout_marginTop="42dp"
        android:text="测试颜色列表状态"
        android:textColor="@color/button_selector_xml"
         />

</RelativeLayout>

button_selector_xml.xml

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

    <item android:state_pressed="true" android:color="#ffff0000"/>
    <item android:state_focused="true" android:color="#ff0000ff"/>
    <item android:color="#ff000000"/>

</selector>

MainActivity.java

package com.example.android_style_theme2;

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

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}