第一章:初入Android大门(通过Button设置TextView颜色)

效果:












main.xml

<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout
android:id="@+id/widget0"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
>
<Button
android:id="@+id/setColor"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="&#25442;&#39068;&#33394;"
android:layout_x="116px"
android:layout_y="202px"
>
</Button>
<TextView
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="21px"
android:text="&#20320;&#22909;&#21834;&#65281;&#65281;&#65281;"
android:layout_x="100px"
android:layout_y="143px"
>
</TextView>
</AbsoluteLayout>

color.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
	<color  name="red">#FF0000</color>
	<color  name="green">#00FF00</color>
	<color  name="yellow">#FFFF00</color>
	<color  name="bule">#0000FF</color>
</resources>

package set.textView.color;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class SetTextViewColor extends Activity {
 
    private int[] arry;
    private int count=0;
    private TextView text;
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        /**载入main.xml*/
        setContentView(R.layout.main);
        /**通过main.xml找到Button组件*/
        Button bt=(Button)findViewById(R.id.setColor);
        /**通过main.xml找到TextView组件*/
        text=(TextView)findViewById(R.id.text);
        /**设置一个数组存入颜色*/
		arry=new int[]{R.color.red,R.color.bule,R.color.green,R.color.yellow};
		/**设置按钮点击事件*/
        bt.setOnClickListener(new Button.OnClickListener(){
        	/**改变TextView的颜色*/
        	public void onClick(View v){
        		int myColor=0;
        		if(count<arry.length){
        			/**获取color.xml文件里的配置项*/
        			myColor=getResources().getColor(arry[count]);
        			/**设置TextView内容*/
        			text.setTextColor(myColor);
        			count++;
        		}else{
        			count=0;
        		}
        	}
        });
    }
}