3.3 MonoForAndroid用户人机界面-更改TextView文字颜色

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在程序中新建两个类成员变量:mTextView01与mTextView02.

这两个变量在onCreate之初,以findViewById方法初始化为layout(main.xml)里的TextView对象.在当中使用了

Resource类以及Drawable类,分别创建了resources对象以及HippoDrawable对象,

Main.axml

<?xml version="1.0" encoding="utf-8"?><AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/widget35"    android:layout_width="fill_parent"    android:layout_height="fill_parent">    <TextView        android:id="@+id/myTextView01"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/str_1"        android:layout_x="61px"        android:layout_y="69px" />    <TextView        android:id="@+id/myTextView02"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/str_2"        android:layout_x="61px"        android:layout_y="69px" /></AbsoluteLayout>

MainActivity.cs

添加新的命名空间

using Android.Content.Res;using Android.Graphics.Drawables;using Android.Graphics;

把JAVA编写的 Resources resources = getBaseContext().getResources();

更改为C#:Resources resources = this.Resources;

sing System;using Android.App;using Android.Content;using Android.Runtime;using Android.Views;using Android.Widget;using Android.OS;//using Android.Content.Res;using Android.Graphics.Drawables;using Android.Graphics;namespace Ex03_03{    [Activity(Label = "Ex03_03", MainLauncher = true, Icon = "@drawable/icon")]    public class MainActivity : Activity    {             protected override void OnCreate(Bundle bundle)        {            base.OnCreate(bundle);            // Set our view from the "main" layout resource            SetContentView(Resource.Layout.Main);            // Get our button from the layout resource,            // and attach an event to it            TextView mTextView01 = (TextView)FindViewById(Resource.Id.myTextView01);            mTextView01.SetText("文本1", TextView.BufferType.Normal);            Resources resources = this.Resources;            Drawable HippoDrawable = resources.GetDrawable(Resource.Drawable.darkgray);            mTextView01.SetBackgroundDrawable(HippoDrawable);            TextView mTextView02 = (TextView)FindViewById(Resource.Id.myTextView02);            mTextView02.SetTextColor(Color.Red);        }    }}

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