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。
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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：
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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。
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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：
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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：
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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：
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<?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
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<?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。
