android layout动态布局
16lz
2021-01-26
RelativeLayout rl = new RelativeLayout(this); Button btn1 = new Button(this); btn1.setText("----------------------"); btn1.setId(1); RelativeLayout.LayoutParams lp1 = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); lp1.addRule(RelativeLayout.ALIGN_PARENT_TOP); lp1.addRule(RelativeLayout.CENTER_HORIZONTAL, RelativeLayout.TRUE); // btn1 位于父 View 的顶部,在父 View 中水平居中 rl.addView(btn1, lp1 ); Button btn2 = new Button(this); btn2.setText("|\n|\n|\n|\n|\n|"); btn2.setId(2); RelativeLayout.LayoutParams lp2 = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); lp2.addRule(RelativeLayout.BELOW, 1); lp2.addRule(RelativeLayout.ALIGN_LEFT, 1); // btn2 位于 btn1 的下方、其左边和 btn1 的左边对齐 rl.addView(btn2, lp2); Button btn3 = new Button(this); btn3.setText("|\n|\n|\n|\n|\n|"); btn3.setId(3); RelativeLayout.LayoutParams lp3 = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); lp3.addRule(RelativeLayout.BELOW, 1); lp3.addRule(RelativeLayout.RIGHT_OF, 2); lp3.addRule(RelativeLayout.ALIGN_RIGHT, 1); // 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) rl.addView(btn3,lp3); Button btn4 = new Button(this); btn4.setText("--------------------------------------------"); btn4.setId(4); RelativeLayout.LayoutParams lp4 = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); lp4.addRule(RelativeLayout.BELOW, 2); lp4.addRule(RelativeLayout.CENTER_HORIZONTAL, RelativeLayout.TRUE); // btn4 位于 btn2 的下方,在父 Veiw 中水平居中 rl.addView(btn4,lp4); setContentView(rl);
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