1/* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.example.android.supportv4.widget; 18 19import android.app.Activity; 20import android.os.Bundle; 21import android.support.v4.widget.ContentLoadingProgressBar; 22import android.view.View; 23import android.view.View.OnClickListener; 24import android.view.ViewTreeObserver; 25import android.widget.Button; 26import android.widget.TextView; 27 28import com.example.android.supportv4.R; 29 30/** 31 * Demonstrates how to use the ContentLoadingProgressBar. By default, the 32 * developer should start the ContentLoadingProgressBar with visibility of 33 * "gone" or "invisible". The ContentLoadingProgressBar will be shown after the 34 * default delay for at least a minimum time regardless of when the "hide" 35 * button is pressed. 36 */ 37public class ContentLoadingProgressBarActivity extends Activity implements 38 OnClickListener, ViewTreeObserver.OnGlobalLayoutListener { 39 40 private Button mShowButton; 41 private Button mHideButton; 42 private ContentLoadingProgressBar mBar; 43 private long mShowTime; 44 private long mHideTime; 45 private TextView mShowText; 46 private TextView mShowTextDone; 47 private TextView mHideText; 48 private TextView mHideTextDone; 49 private int mLastVisibility; 50 private long mVisibilityChangedTime; 51 52 @Override 53 protected void onCreate(Bundle savedInstanceState) { 54 super.onCreate(savedInstanceState); 55 setContentView(R.layout.content_loading_progressbar); 56 57 mBar = (ContentLoadingProgressBar)findViewById(R.id.progressbar); 58 mShowButton = (Button)findViewById(R.id.show); 59 mShowButton.setOnClickListener(this); 60 mHideButton = (Button)findViewById(R.id.hide); 61 mHideButton.setOnClickListener(this); 62 63 mShowText = (TextView)findViewById(R.id.show_text); 64 mShowTextDone = (TextView)findViewById(R.id.show_text_done); 65 mHideText = (TextView)findViewById(R.id.hide_text); 66 mHideTextDone = (TextView)findViewById(R.id.hide_text_done); 67 68 mLastVisibility = mBar.getVisibility(); 69 70 mBar.getViewTreeObserver().addOnGlobalLayoutListener(this); 71 } 72 73 @Override 74 public void onClick(View v) { 75 switch (v.getId()) { 76 case R.id.show: 77 mBar.show(); 78 mShowTime = System.currentTimeMillis(); 79 mShowText.setText("Show clicked at " + mShowTime); 80 break; 81 case R.id.hide: 82 mBar.hide(); 83 mHideTime = System.currentTimeMillis(); 84 mHideText.setText("Hide clicked at " + mHideTime); 85 break; 86 } 87 } 88 89 @Override 90 public void onGlobalLayout() { 91 final int visibility = mBar.getVisibility(); 92 93 if (mLastVisibility != visibility) { 94 if (visibility == View.VISIBLE) { 95 mVisibilityChangedTime = System.currentTimeMillis(); 96 mShowTextDone.setText("Shown at " 97 + (mVisibilityChangedTime - mShowTime)); 98 } else { 99 mHideTextDone.setText("Hidden after " 100 + (System.currentTimeMillis() - mVisibilityChangedTime)); 101 } 102 mLastVisibility = mBar.getVisibility(); 103 } 104 } 105} 106