Android TextView文字透明度和背景透明度設置

textview1.setTextColor(Color.argb(255, 0, 255, 0)); //文字透明度

最關鍵部分，設置字體透明度 argb(Alpha, R, G, B)

1. package net.Android.touming;
3. import android.widget.TextView;
4. import android.os.Bundle;
5. import android.view.ViewGroup;
6. import android.app.Activity;
7. import android.graphics.Color;
8. import android.widget.LinearLayout;
10. public class touming extends Activity {
12. final int WRAP_CONTENT = ViewGroup.LayoutParams.WRAP_CONTENT;
14. public void onCreate(Bundle icicle) {
15. super.onCreate(icicle);
17. LinearLayout linearLayout = new LinearLayout(this);
18. linearLayout.setOrientation(LinearLayout.VERTICAL);
19. setContentView(linearLayout);
21. TextView textview1 = new TextView(this);
22. textview1.setText("全部不透明＝255");
23. //textview1.setBackgroundColor(Color.argb(255, 0, 255, 0)); //背景透明度
24. textview1.setTextColor(Color.argb(255, 0, 255, 0)); //文字透明度
25. linearLayout.addView(textview1, new LinearLayout.LayoutParams(WRAP_CONTENT,
26. WRAP_CONTENT));
28. TextView textview2 = new TextView(this);
29. textview2.setText("部分透分155");
30. textview2.setBackgroundColor(Color.argb(155, 0, 255, 0)); //背景透明度
31. textview2.setTextColor(Color.argb(155, 0, 255, 0)); //文字透明度
32. linearLayout.addView(textview2, new LinearLayout.LayoutParams(WRAP_CONTENT,
33. WRAP_CONTENT));
35. TextView textview3 = new TextView(this);
36. textview3.setText("部分透明55");
37. textview3.setBackgroundColor(Color.argb(55, 0, 255, 0)); ///背景透明度
38. textview3.setTextColor(Color.argb(55, 0, 255, 0)); //文字透明度
39. linearLayout.addView(textview3, new LinearLayout.LayoutParams(WRAP_CONTENT,
40. WRAP_CONTENT));
42. TextView textview4 = new TextView(this);
43. textview4.setText("全部透明0");
44. //textview4.setBackgroundColor(Color.argb(0, 0, 255, 0)); //背景透明度
45. textview4.setTextColor(Color.argb(0, 0, 255, 0)); //文字透明度
46. linearLayout.addView(textview4, new LinearLayout.LayoutParams(WRAP_CONTENT,
47. WRAP_CONTENT));
49. }
51. }