1 RelativeLayout rl = new RelativeLayout(this); 2 3 Button btn1 = new Button(this); 4 btn1.setText("----------------------"); 5 btn1.setId(1); 6 7 RelativeLayout.LayoutParams lp1 = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 8 lp1.addRule(RelativeLayout.ALIGN_PARENT_TOP); 9 lp1.addRule(RelativeLayout.CENTER_HORIZONTAL, RelativeLayout.TRUE); 10 // btn1 位于父 View 的顶部，在父 View 中水平居中 11 rl.addView(btn1, lp1 ); 12 13 Button btn2 = new Button(this); 14 btn2.setText("|\n|\n|\n|\n|\n|"); 15 btn2.setId(2); 16 17 RelativeLayout.LayoutParams lp2 = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 18 lp2.addRule(RelativeLayout.BELOW, 1); 19 lp2.addRule(RelativeLayout.ALIGN_LEFT, 1); 20 // btn2 位于 btn1 的下方、其左边和 btn1 的左边对齐 21 rl.addView(btn2, lp2); 22 23 Button btn3 = new Button(this); 24 btn3.setText("|\n|\n|\n|\n|\n|"); 25 btn3.setId(3); 26 27 RelativeLayout.LayoutParams lp3 = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 28 lp3.addRule(RelativeLayout.BELOW, 1); 29 lp3.addRule(RelativeLayout.RIGHT_OF, 2); 30 lp3.addRule(RelativeLayout.ALIGN_RIGHT, 1); 31 // btn3 位于 btn1 的下方、btn2 的右方且其右边和 btn1 的右边对齐（要扩充） 32 rl.addView(btn3,lp3); 33 34 Button btn4 = new Button(this); 35 btn4.setText("--------------------------------------------"); 36 btn4.setId(4); 37 38 RelativeLayout.LayoutParams lp4 = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 39 lp4.addRule(RelativeLayout.BELOW, 2); 40 lp4.addRule(RelativeLayout.CENTER_HORIZONTAL, RelativeLayout.TRUE); 41 // btn4 位于 btn2 的下方，在父 Veiw 中水平居中 42 rl.addView(btn4,lp4); 43 44 45 setContentView(rl);