19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2007 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 171d3165f10b12165f02b7015ac1a817c5f60e6399Neal Nguyenpackage android.widget.listview; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.app.Activity; 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.Bundle; 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.View; 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewGroup; 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.widget.ArrayAdapter; 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.widget.ListView; 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 261d3165f10b12165f02b7015ac1a817c5f60e6399Neal Nguyenimport com.android.frameworks.coretests.R; 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class ListViewHeight extends Activity { 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View mButton1; 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View mButton2; 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View mButton3; 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View mOuterLayout; 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private ListView mInnerList; 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ArrayAdapter<String> mAdapter; 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private String[] mStrings = { 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "Abbaye de Belloc", "Abbaye du Mont des Cats", "Abertam", "Abondance", "Ackawi" }; 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onCreate(Bundle savedInstanceState) { 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onCreate(savedInstanceState); 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setContentView(R.layout.linear_layout_listview_height); 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mButton1 = findViewById(R.id.button1); 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mButton2 = findViewById(R.id.button2); 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mButton3 = findViewById(R.id.button3); 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOuterLayout = findViewById(R.id.layout); 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mInnerList = (ListView)findViewById(R.id.inner_list); 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line, 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mStrings); 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Clicking this button will show the list view and set it to a fixed height 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // If you then hide the views, there is no problem. 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mButton1.setOnClickListener(new View.OnClickListener() { 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void onClick(View v) { 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // set listview to fixed height 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewGroup.MarginLayoutParams lp; 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project lp = (ViewGroup.MarginLayoutParams) mInnerList.getLayoutParams(); 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project lp.height = 200; 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mInnerList.setLayoutParams(lp); 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // enable list adapter 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mInnerList.setAdapter(mAdapter); 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // and show it 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOuterLayout.setVisibility(View.VISIBLE); 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project }); 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 73980a938c1c9a6a5791a8240e5a1e6638ab28dc77Romain Guy // Clicking this button will show the list view and set it match_parent height 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // If you then hide the views, there is an NPE when calculating the ListView height. 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mButton2.setOnClickListener(new View.OnClickListener() { 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void onClick(View v) { 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // set listview to fill screen 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewGroup.MarginLayoutParams lp; 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project lp = (ViewGroup.MarginLayoutParams) mInnerList.getLayoutParams(); 80980a938c1c9a6a5791a8240e5a1e6638ab28dc77Romain Guy lp.height = lp.MATCH_PARENT; 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mInnerList.setLayoutParams(lp); 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // enable list adapter 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mInnerList.setAdapter(mAdapter); 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // and show it 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOuterLayout.setVisibility(View.VISIBLE); 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project }); 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Clicking this button will remove the list adapter and hide the outer enclosing view. 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // We have to climb all the way to the top because the bug (not checking visibility) 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // only occurs at the very outer loop of ViewRoot.performTraversals and in the case of 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // an Activity, this means you have to crawl all the way out to the root view. 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // In the search manager, it's sufficient to simply show/hide the outer search manager 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // view to trigger the same bug. 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mButton3.setOnClickListener(new View.OnClickListener() { 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void onClick(View v) { 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mInnerList.setAdapter(null); 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // hide listview's owner 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // as it turns out, the owner doesn't take us high enough 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // because our activity includes a title bar, thus another layer 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View parent = (View) mOuterLayout.getParent(); // FrameLayout (app container) 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View grandpa = (View) parent.getParent(); // LinearLayout (title+app) 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View great = (View) grandpa.getParent(); // PhoneWindow.DecorView 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project great.setVisibility(View.GONE); 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project }); 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 110