Android uses code to implement relativelayout layouts

Simply copy the code into the OnCreate method to run
Java code

2. Relativelayout RL = New Relativelayout (this);
6. Button BTN1 = New button (this);
8. Btn1.settext ("----------------------");
10. Btn1.setid (1);
14. Relativelayout.layoutparams LP1 = new Relativelayout.layoutparams (ViewGroup.LayoutParams.WRAP_CONTENT,  ViewGroup.LayoutParams.WRAP_CONTENT);
16. Lp1.addrule (Relativelayout.align_parent_top);
18. Lp1.addrule (Relativelayout.center_horizontal, relativelayout.true);
20. //BTN1 at the top of the parent view, centered horizontally in the parent view
22. Rl.addview (BTN1, LP1);
26. Button BTN2 = New button (this);
28. Btn2.settext ("|\n|\n|\n|\n|\n|");
30. Btn2.setid (2);
34. Relativelayout.layoutparams LP2 = new Relativelayout.layoutparams (ViewGroup.LayoutParams.WRAP_CONTENT,  ViewGroup.LayoutParams.WRAP_CONTENT);
36. Lp2.addrule (Relativelayout.below, 1);
38. Lp2.addrule (Relativelayout.align_left, 1);
40. //BTN2 at the bottom of btn1, to the left and to the left of the BTN1
42. Rl.addview (BTN2, LP2);
46. Button BTN3 = New button (this);
48. Btn3.settext ("|\n|\n|\n|\n|\n|");
50. Btn3.setid (3);
54. Relativelayout.layoutparams lp3 = new Relativelayout.layoutparams (ViewGroup.LayoutParams.WRAP_CONTENT,  ViewGroup.LayoutParams.WRAP_CONTENT);
56. Lp3.addrule (Relativelayout.below, 1);
58. Lp3.addrule (relativelayout.right_of, 2);
60. Lp3.addrule (Relativelayout.align_right, 1);
62. //BTN3 is located below the btn1, right side of the BTN2, and aligned with BTN1 's right (to expand)
64. Rl.addview (BTN3,LP3);
68. Button BTN4 = New button (this);
70. Btn4.settext ("--------------------------------------------");
72. Btn4.setid (4);
76. Relativelayout.layoutparams LP4 = new Relativelayout.layoutparams (ViewGroup.LayoutParams.WRAP_CONTENT,  ViewGroup.LayoutParams.WRAP_CONTENT);
78. Lp4.addrule (Relativelayout.below, 2);
80. Lp4.addrule (Relativelayout.center_horizontal, relativelayout.true);
82. //Btn4 is located below btn2 and is centered horizontally in parent veiw
84. Rl.addview (BTN4,LP4);
90. Setcontentview (RL);

Code reference from:
Http://hi.baidu.com/xiechengfa/blog/item/5a3570eb3afb1a31b90e2d54.html, there's a change.

Android uses code for relativelayout layouts