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();
}
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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 ));
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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);
}
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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) {
}
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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);
}
}
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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 >
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/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 >
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希望本文所述对大家Android程序设计有所帮助。