Android TextView文字透明度和背景透明度设置

控件名.getBackground().setAlpha(int);   int 在0-255之间

package net.android.alpha;

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 touming 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 textview1 = new TextView(this);
  textview1.setText("全部不透明＝255");
  //textview1.setBackgroundColor(Color.argb(255, 0, 255, 0)); //背景透明度
  textview1.setTextColor(Color.argb(255, 0, 255, 0));   //文字透明度
  linearLayout.addView(textview1, new LinearLayout.LayoutParams(WRAP_CONTENT,
    WRAP_CONTENT));

  TextView textview2 = new TextView(this);
  textview2.setText("部分透分155");
  textview2.setBackgroundColor(Color.argb(155, 0, 255, 0));  //背景透明度
  textview2.setTextColor(Color.argb(155, 0, 255, 0));  //文字透明度
  linearLayout.addView(textview2, new LinearLayout.LayoutParams(WRAP_CONTENT,
    WRAP_CONTENT));

  TextView textview3 = new TextView(this);
  textview3.setText("部分透明55");
  textview3.setBackgroundColor(Color.argb(55, 0, 255, 0));  ///背景透明度
  textview3.setTextColor(Color.argb(55, 0, 255, 0));  //文字透明度
  linearLayout.addView(textview3, new LinearLayout.LayoutParams(WRAP_CONTENT,
    WRAP_CONTENT));

  TextView textview4 = new TextView(this);
  textview4.setText("全部透明0");
  //textview4.setBackgroundColor(Color.argb(0, 0, 255, 0)); //背景透明度
  textview4.setTextColor(Color.argb(0, 0, 255, 0));  //文字透明度
  linearLayout.addView(textview4, new LinearLayout.LayoutParams(WRAP_CONTENT,
    WRAP_CONTENT));

 }

}