通过代码为TextView设置wrap_content的宽度

谁能帮助我如何设置的宽度TextView要wrap_content通过代码，而不是从XML？

我正在动态创建一个TextViewin代码，因此如何wrap_content通过代码设置其宽度？

TextView pf = new TextView(context);
pf.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

对于ConstraintLayout和这样的不同布局，它们具有自己的LayoutParams，如下所示：

pf.setLayoutParams(new ConstraintLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT)); 

要么

parentView.addView(pf, new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

还有另一种方法可以达到相同的结果。如果您只需要设置一个参数，例如“ height”：

TextView textView = (TextView)findViewById(R.id.text_view);
ViewGroup.LayoutParams params = textView.getLayoutParams();
params.height = ViewGroup.LayoutParams.WRAP_CONTENT;
textView.setLayoutParams(params);

更改TextView宽度以包装内容的解决方案。

textView.getLayoutParams().width = ViewGroup.LayoutParams.WRAP_CONTENT; 
textView.requestLayout();  
// Call requestLayout() for redraw your TextView when your TextView is already drawn (laid out) (eg: you update TextView width when click a Button). 
// If your TextView is drawing you may not need requestLayout() (eg: you change TextView width inside onCreate()). However if you call it, it still working well => for easy: always use requestLayout()

// Another useful example
// textView.getLayoutParams().width = 200; // For change `TextView` width to 200 pixel

我发布了android Java base多行edittext。

EditText editText = findViewById(R.id.editText);/* edittext access */

ViewGroup.LayoutParams params  =  editText.getLayoutParams(); 
params.height = ViewGroup.LayoutParams.WRAP_CONTENT;
editText.setLayoutParams(params); /* Gives as much height for multi line*/

editText.setSingleLine(false); /* Makes it Multi line */

我认为这段代码可以回答您的问题

RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) 
holder.desc1.getLayoutParams();
params.height = RelativeLayout.LayoutParams.WRAP_CONTENT;
holder.desc1.setLayoutParams(params);