Activity中动态设置TextView的颜色

android中设置TextView的颜色有方法setTextColor，这个方法被重载了，可以传入两种参数 

Java代码:

 public void setTextColor(int color) {
     mTextColor = ColorStateList.valueOf(color);
     updateTextColors();
 }

 public void setTextColor(ColorStateList colors) {
     if (colors == null) {
         throw new NullPointerException();
     }

     mTextColor = colors;
     updateTextColors();
 }

 

下边就分别写出怎么使用这两个方法设置TextView的颜色：

 

Java代码:

 TextView tv = new TextView(this);
 tv.setText("Test set TextView's color.");
 //方案一：代码中通过argb值的方式
 tv.setTextColor(Color.rgb(255, 255, 255));

 

这种方法也就是传入int color值，这个int不是R文件中自动分配的int值，所以要注意。这是Color类中的静态方法构造出来的颜色int值。

 

Java代码:

 Resources resource = (Resources) getBaseContext().getResources();
 ColorStateList csl = (ColorStateList) resource.getColorStateList(R.color.my_color);
 if (csl != null) {
     tv.setTextColor(csl);
 }

 

这种方法是通过ColorStateList得到xml中的配置的颜色的。好多需要xml中配置的都要类似这样的映射xml文件。

还有种方法Java代码:

 XmlResourceParser xrp = getResources().getXml(R.color.my_color);
 try {
     ColorStateList csl = ColorStateList.createFromXml(getResources(), xrp);
     tv.setTextColor(csl);
 } catch (Exception e) {
 }

 全部代码Java代码 :

 package com.txlong;

 import android.app.Activity;
 import android.graphics.Color;
 import android.os.Bundle;
 import android.widget.TextView;

 public class ListViewDemoActivity extends Activity {
     // private ListView listView;

     /** Called when the activity is first created. */
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);

         TextView tv = new TextView(this);
         tv.setText("Test set TextView's color.");
         //方案一：通过ARGB值的方式
         /**
          * set the TextView color as the 0~255's ARGB，These component values
          * should be [0..255], but there is no range check performed, so if they
          * are out of range, the returned color is undefined
          */
 //      tv.setTextColor(Color.rgb(255, 255, 255));
         /**
          * set the TextView color as the #RRGGBB #AARRGGBB 'red', 'blue',
          * 'green', 'black', 'white', 'gray', 'cyan', 'magenta', 'yellow',
          * 'lightgray', 'darkgray'
          */
         tv.setTextColor(Color.parseColor("#FFFFFF"));


         /** 原来不知道有上边的方法，就用这个笨笨方法了 */
 //      String StrColor = null;
 //      StrColor = "FFFFFFFF";
 //      int length = StrColor.length();
 //      if (length == 6) {
 //          tv.setTextColor(Color.rgb(
 //                  Integer.valueOf(StrColor.substring(0, 2), 16),
 //                  Integer.valueOf(StrColor.substring(2, 4), 16),
 //                  Integer.valueOf(StrColor.substring(4, 6), 16)));
 //      } else if (length == 8) {
 //          tv.setTextColor(Color.argb(
 //                  Integer.valueOf(StrColor.substring(0, 2), 16),
 //                  Integer.valueOf(StrColor.substring(2, 4), 16),
 //                  Integer.valueOf(StrColor.substring(4, 6), 16),
 //                  Integer.valueOf(StrColor.substring(6, 8), 16)));
 //      }

         //方案二：通过资源引用
 //      tv.setTextColor(getResources().getColor(R.color.my_color));

         //方案三：通过资源文件写在String.xml中
 //      Resources resource = (Resources) getBaseContext().getResources();
 //      ColorStateList csl = (ColorStateList) resource.getColorStateList(R.color.my_color);
 //      if (csl != null) {
 //          tv.setTextColor(csl);
 //      }

         //方案四：通过xml文件，如/res/text_color.xml
 //      XmlPullParser xrp = getResources().getXml(R.color.text_color);
 //      try {
 //          ColorStateList csl = ColorStateList.createFromXml(getResources(), xrp);
 //          tv.setTextColor(csl);
 //      } catch (Exception e) {
 //      }

         // listView = new ListView(this);
         //
         // Cursor cursor = getContentResolver().query(
         // Uri.parse("content://contacts/people"), null, null, null, null);
         //
         // startManagingCursor(cursor);
         //
         // ListAdapter listAdapter = new SimpleCursorAdapter(this,
         // android.R.layout.simple_expandable_list_item_2, cursor,
         // new String[] { "name", "name" }, new int[] {
         // android.R.id.text1, android.R.id.text2 });
         //
         // listView.setAdapter(listAdapter);
         // setContentView(listView);
         setContentView(tv);
     }
 }

String.xml文件为：

 <?xml version="1.0" encoding="utf-8"?>
 <resources>

     <string name="hello">Hello World, ListViewDemoActivity!</string>
     <string name="app_name">ListViewDemo</string>

     <color name="my_color">#FFFFFF</color>

 </resources>

/res/color/text_color.xml 代码  :

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

     <item android:state_pressed="true" android:color="#FF111111"/>
     <!-- pressed -->
     <item android:state_focused="true" android:color="#FF222222"/>
     <!-- focused -->
     <item android:state_selected="true" android:color="#FF333333"/>
     <!-- selected -->
     <item android:state_active="true" android:color="#FF444444"/>
     <!-- active -->
     <item android:state_checkable="true" android:color="#FF555555"/>
     <!-- checkable -->
     <item android:state_checked="true" android:color="#FF666666"/>
     <!-- checked -->
     <item android:state_enabled="true" android:color="#FF777777"/>
     <!-- enabled -->
     <item android:state_window_focused="true" android:color="#FF888888"/>
     <!-- window_focused -->

 </selector>