Android设置背景色可以通过在res/drawable里定义一个xml,如下:
[代码]xml代码:
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<? xml version = "1.0" encoding = "utf-8" ?>
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< shape xmlns:android = "http://schemas.android.com/apk/res/android" >
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android:startColor = "#FFF"
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android:endColor = "#000"
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shape是用来定义形状的,gradient定义该形状里面为渐变色填充,startColor起始颜色,endColor结束颜色,angle表示方向角度。当angle=0时,渐变色是从左向右。 然后逆时针方向转,当angle=90时为从下往上。
实现过程:
第一步:
res/drawable/background_login.xml
[代码]xml代码:
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<? xml version = "1.0" encoding = "utf-8" ?>
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< shape xmlns:android = "http://schemas.android.com/apk/res/android" >
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android:startColor = "#FFF"
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android:endColor = "#000"
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第二步:
res/layout/login.xml
[代码]xml代码:
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<? xml version = "1.0" encoding = "utf-8" ?>
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< LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"
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android:orientation = "vertical"
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android:layout_width = "fill_parent"
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android:layout_height = "fill_parent"
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android:background = "@drawable/background_login" >
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第三步:
[代码]java代码:
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import android.app.Activity;
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import android.os.Bundle;
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public class LoginActivity extends Activity {
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public void onCreate(Bundle savedInstanceState) {
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super .onCreate(savedInstanceState);
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setContentView(R.layout.login);
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效果图:
