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Android编程设置TextView颜色setTextColor用法实例

2020-04-11 10:59:25
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本文实例讲述了Android编程设置TextView颜色setTextColor用法。分享给大家供大家参考,具体如下:

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。

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:

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。

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:

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:

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

<?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>

希望本文所述对大家Android程序设计有所帮助。

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