在相对布局中以编程方式添加视图
我想这样编程：
view1 | view2 view3 | view4 ---------------- view1 | view2 view3 | view4 ---------------- view1 | view2 view3 | view4 --------------- ........... ...... which keeps repeating -------------- 我不想使用ListView。
重要提示：请记住为每个视图设置ID。
RelativeLayout layout = new RelativeLayout(this); RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); layout.setLayoutParams(layoutParams); RelativeLayout.LayoutParams params1 = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); RelativeLayout.LayoutParams params2 = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); RelativeLayout.LayoutParams params3 = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); RelativeLayout.LayoutParams params4 = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); TextView tv1 = new TextView(this); tv1.setId(1); tv1.setText("textView1"); TextView tv2 = new TextView(this); params2.addRule(RelativeLayout.RIGHT_OF, tv1.getId()); tv2.setId(2); tv2.setText("textView2"); TextView tv3 = new TextView(this); params3.addRule(RelativeLayout.BELOW, tv1.getId()); tv3.setId(3); tv3.setText("textView3"); TextView tv4 = new TextView(this); params4.addRule(RelativeLayout.RIGHT_OF, tv3.getId()); params4.addRule(RelativeLayout.ALIGN_BOTTOM, tv3.getId()); tv4.setId(4); tv4.setText("textView4"); layout.addView(tv1, params1); layout.addView(tv2, params2); layout.addView(tv3, params3); layout.addView(tv4, params4);
在@Askilondz答案中build议使用多个布局参数，而removeRule像下面那样使用addRule和removeRule ：
RelativeLayout rl = new RelativeLayout(this.getContext()); RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); TextView tv1 = new TextView(this); tv1.setId(View.generateViewId()); tv1.setText("textView1"); TextView tv2 = new TextView(this); tv2.setId(View.generateViewId()); tv2.setText("textView2"); lp.addRule(RelativeLayout.BELOW, tv1.getId()); rl.addView(tv2, lp); lp.removeRule(RelativeLayout.BELOW); . . .
如果使用SDK <17，则必须创buildid's.xml文件，如values -> ids.xml ，其结构如下所示：
<?xml version="1.0" encoding="utf-8"?> <resources> <item name="tv1" type="id" /> <item name="tv2" type="id" /> </resources>
并将它们设置为您的代码：
tv1.setId(R.id.tv1); tv2.setId(R.id.tv2);
更新它看起来相同的LayoutParams添加多个规则不能正常工作，无论如何，我会保持我的答案，以防有人罚款对他有用的东西
ImageView imageView = new ImageView(this); // set the Drawable on the ImageView imageView.setImageDrawable(bmd); // center the Image imageView.setScaleType(ScaleType.CENTER); RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams( LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);
