android.graphics.Color实践

yckits

package com.china.helloandroid;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
import android.graphics.Color;
import android.widget.LinearLayout;

public class HelloAndroid extends Activity {
    /** Called when the activity is first created. */
private LinearLayout myLayout;
private LinearLayout.LayoutParams layoutP;
private int WC = LinearLayout.LayoutParams.WRAP_CONTENT;
private TextView black_TV, blue_TV, cyan_TV, dkgray_TV, gray_TV, green_TV, ltgray_TV,
magenta_TV, red_TV, transparent_TV, white_TV, yellow_TV;

@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        //实例化布局对象
        myLayout = new LinearLayout(this);
        //设置为垂直布局
        myLayout.setOrientation(LinearLayout.VERTICAL);
        //设置布局背景图片
        //myLayout.setBackgroundResource(R.drawable.icon);
        //加载主屏布局
        setContentView(myLayout);
        //实例化一个布局参数
        layoutP = new LinearLayout.LayoutParams(WC, WC);
        //实例化TextView对象
        constructTextView();
        //添加TextView对象到布局当中
        addTextView();
        //设置TextView颜色
        setTextViewColor();
        //设置TextView文字
        setTextViewText();
    }

public void setTextViewText(){
black_TV.setText("黑色");
blue_TV.setText("蓝色");
cyan_TV.setText("青绿色");
dkgray_TV.setText("灰黑色");
gray_TV.setText("灰色");
green_TV.setText("绿色");
ltgray_TV.setText("浅灰色");
magenta_TV.setText("红紫色");
red_TV.setText("红色");
transparent_TV.setText("透明");
white_TV.setText("白色");
yellow_TV.setText("黄色");
}

public void setTextViewColor(){
black_TV.setTextColor(Color.BLACK);
blue_TV.setTextColor(Color.BLUE);
cyan_TV.setTextColor(Color.CYAN);
dkgray_TV.setTextColor(Color.DKGRAY);
gray_TV.setTextColor(Color.GRAY);
green_TV.setTextColor(Color.GREEN);
ltgray_TV.setTextColor(Color.LTGRAY);
magenta_TV.setTextColor(Color.MAGENTA);
red_TV.setTextColor(Color.RED);
transparent_TV.setTextColor(Color.TRANSPARENT);
white_TV.setTextColor(Color.WHITE);
yellow_TV.setTextColor(Color.YELLOW);
}

public void addTextView(){
myLayout.addView(black_TV, layoutP);
myLayout.addView(blue_TV, layoutP);
myLayout.addView(cyan_TV, layoutP);
myLayout.addView(dkgray_TV, layoutP);
myLayout.addView(gray_TV, layoutP);
myLayout.addView(green_TV, layoutP);
myLayout.addView(ltgray_TV, layoutP);
myLayout.addView(magenta_TV, layoutP);
myLayout.addView(red_TV, layoutP);
myLayout.addView(transparent_TV, layoutP);
myLayout.addView(white_TV, layoutP);
myLayout.addView(yellow_TV, layoutP);
}

public void constructTextView(){
black_TV = new TextView(this);
blue_TV = new TextView(this);
cyan_TV = new TextView(this);
dkgray_TV = new TextView(this);
gray_TV = new TextView(this);
green_TV = new TextView(this);
ltgray_TV = new TextView(this);
magenta_TV = new TextView(this);
red_TV = new TextView(this);
transparent_TV = new TextView(this);
white_TV = new TextView(this);
yellow_TV = new TextView(this);
}
}