android 设置文本透明度

这个小实例主要讲的就是让文本变的透明度不一样。这个其实就是用到了这个android.graphics.Color。我们利用android给我们的这个包来实现我们想要的效果，这个比较简单，在这里就不多和大家交流，下面就来看看代码是怎么实现的吧

package eoe.demo;

import android.widget.TextView;

import android.os.Bundle;

import android.view.ViewGroup;

import android.app.Activity;

import android.graphics.Color;

import android.widget.LinearLayout;



public class alphaTest extends Activity {

final int WRAP_CONTENT = ViewGroup.LayoutParams.WRAP_CONTENT;

public void onCreate(Bundle icicle) {

super.onCreate(icicle);

LinearLayout linearLayout = new LinearLayout(this);

linearLayout.setOrientation(LinearLayout.VERTICAL);

setContentView(linearLayout);

TextView TV1 = new TextView(this);

TV1.setText(“全部不透明＝255″);

TV1.setBackgroundColor(Color.argb(255, 0, 255, 0));

linearLayout.addView(TV1, new LinearLayout.LayoutParams(WRAP_CONTENT,

WRAP_CONTENT));

TextView TV2 = new TextView(this);

TV2.setText(“部分透明＝155″);

TV2.setBackgroundColor(Color.argb(155, 0, 255, 0));

linearLayout.addView(TV2, new LinearLayout.LayoutParams(WRAP_CONTENT,

WRAP_CONTENT));

TextView TV3 = new TextView(this);

TV3.setText(“部分透明＝55″);

TV3.setBackgroundColor(Color.argb(55, 0, 255, 0));

linearLayout.addView(TV3, new LinearLayout.LayoutParams(WRAP_CONTENT,

WRAP_CONTENT));

TextView TV4 = new TextView(this);

TV4.setText(“全部透明＝0″);

TV4.setBackgroundColor(Color.argb(0, 0, 255, 0));

linearLayout.addView(TV4, new LinearLayout.LayoutParams(WRAP_CONTENT,

WRAP_CONTENT));

}

}