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      1 /*
      2  * Copyright (C) 2007 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 
     17 package com.android.internal.app;
     18 
     19 import android.app.Activity;
     20 import android.app.AlertDialog;
     21 import android.app.Dialog;
     22 import android.content.DialogInterface;
     23 import android.os.Bundle;
     24 import android.text.TextUtils;
     25 import android.view.KeyEvent;
     26 import android.view.ViewGroup;
     27 import android.view.accessibility.AccessibilityEvent;
     28 
     29 /**
     30  * An activity that follows the visual style of an AlertDialog.
     31  *
     32  * @see #mAlert
     33  * @see #mAlertParams
     34  * @see #setupAlert()
     35  */
     36 public abstract class AlertActivity extends Activity implements DialogInterface {
     37 
     38     /**
     39      * The model for the alert.
     40      *
     41      * @see #mAlertParams
     42      */
     43     protected AlertController mAlert;
     44 
     45     /**
     46      * The parameters for the alert.
     47      */
     48     protected AlertController.AlertParams mAlertParams;
     49 
     50     @Override
     51     protected void onCreate(Bundle savedInstanceState) {
     52         super.onCreate(savedInstanceState);
     53 
     54         mAlert = new AlertController(this, this, getWindow());
     55         mAlertParams = new AlertController.AlertParams(this);
     56     }
     57 
     58     public void cancel() {
     59         finish();
     60     }
     61 
     62     public void dismiss() {
     63         // This is called after the click, since we finish when handling the
     64         // click, don't do that again here.
     65         if (!isFinishing()) {
     66             finish();
     67         }
     68     }
     69 
     70     @Override
     71     public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
     72         event.setClassName(Dialog.class.getName());
     73         event.setPackageName(getPackageName());
     74 
     75         ViewGroup.LayoutParams params = getWindow().getAttributes();
     76         boolean isFullScreen = (params.width == ViewGroup.LayoutParams.MATCH_PARENT) &&
     77                 (params.height == ViewGroup.LayoutParams.MATCH_PARENT);
     78         event.setFullScreen(isFullScreen);
     79 
     80         return false;
     81     }
     82 
     83     /**
     84      * Sets up the alert, including applying the parameters to the alert model,
     85      * and installing the alert's content.
     86      *
     87      * @see #mAlert
     88      * @see #mAlertParams
     89      */
     90     protected void setupAlert() {
     91         mAlertParams.apply(mAlert);
     92         mAlert.installContent();
     93     }
     94 
     95     @Override
     96     public boolean onKeyDown(int keyCode, KeyEvent event) {
     97         if (mAlert.onKeyDown(keyCode, event)) return true;
     98         return super.onKeyDown(keyCode, event);
     99     }
    100 
    101     @Override
    102     public boolean onKeyUp(int keyCode, KeyEvent event) {
    103         if (mAlert.onKeyUp(keyCode, event)) return true;
    104         return super.onKeyUp(keyCode, event);
    105     }
    106 }
    107