[轉]Android中設置TextView的顏色setTextColor

[轉自]http://txlong-onz.iteye.com/blog/1249609

Android中設置TextView的顏色setTextColor

android中設置TextView的顏色有方法setTextColor，這個方法被重載了，可以傳入兩種參數。

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

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

    mTextColor = colors;
    updateTextColors();
}

下邊就分別寫出怎么使用這兩個方法設置TextView的顏色：

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

這種方法也就是傳入int color值，這個int不是R文件中自動分配的int值，所以要注意。這是Color類中的靜態方法構造出來的顏色int值。

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

這種方法是通過ColorStateList得到xml中的配置的顏色的。好多需要xml中配置的都要類似這樣的映射xml文件。

還有種方法：

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

 全部代碼：

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：通過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"));
        
        
        /** 原來不知道有上邊的方法，就用這個笨笨方法了 */
//        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：通過資源引用
//        tv.setTextColor(getResources().getColor(R.color.my_color));
        
        //方案三：通過資源文件寫在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：通過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文件為：

<?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>