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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。