android - 以编程方式创建和显示 ProgressBar

Question

我在我的 Activity 中以编程方式创建了一个 ProgressBar，如下所示。如何让它显示？

progressBar = new ProgressBar(activity, null, android.R.attr.progressBarStyleSmall);

Answer 1

您可以尝试使用此代码以编程方式将进度条添加到您的布局。

RelativeLayout layout = new RelativeLayout(this);
ProgressBar progressBar = new ProgressBar(YourActivity.this,null,android.R.attr.progressBarStyleLarge);
progressBar.setIndeterminate(true);
progressBar.setVisibility(View.VISIBLE);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(100,100);
params.addRule(RelativeLayout.CENTER_IN_PARENT);
layout.addView(progressBar,params);

setContentView(layout);