<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent"> <Button android:id="@+id/bn1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:text="显示" /> <Button android:id="@+id/bn2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_centerHorizontal="true" android:text="隐藏" /> </RelativeLayout>
package com.example.titleprogressbar; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.view.Window; import android.widget.Button; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //设置窗口特征,启用显示进度的进度条 requestWindowFeature(Window.FEATURE_PROGRESS); //设置窗口特征,启用不显示进度的进度条 requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS); setContentView(R.layout.activity_main); Button bn1=(Button) findViewById(R.id.bn1); Button bn2=(Button) findViewById(R.id.bn2); bn1.setOnClickListener(new OnClickListener(){ @Override public void onClick(View v) { //显示不带进度的进度条 setProgressBarIndeterminateVisibility(true); //显示带进度的进度条 setProgressBarVisibility(true); //设置进度条的进度 setProgress(4500); } }); bn2.setOnClickListener(new OnClickListener(){ @Override public void onClick(View v) { //隐藏不带进度的进度条 setProgressBarIndeterminateVisibility(false); //隐藏带进度的进度条 setProgressBarVisibility(false); } }); } }