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      1 /*
      2  * Copyright (C) 2008 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.example.android.apis.appwidget;
     18 
     19 import android.app.Activity;
     20 import android.appwidget.AppWidgetManager;
     21 import android.content.Context;
     22 import android.content.Intent;
     23 import android.content.SharedPreferences;
     24 import android.os.Bundle;
     25 import android.view.View;
     26 import android.widget.EditText;
     27 
     28 import java.util.ArrayList;
     29 
     30 // Need the following import to get access to the app resources, since this
     31 // class is in a sub-package.
     32 import com.example.android.apis.R;
     33 
     34 /**
     35  * The configuration screen for the ExampleAppWidgetProvider widget sample.
     36  */
     37 public class ExampleAppWidgetConfigure extends Activity {
     38     static final String TAG = "ExampleAppWidgetConfigure";
     39 
     40     private static final String PREFS_NAME
     41             = "com.example.android.apis.appwidget.ExampleAppWidgetProvider";
     42     private static final String PREF_PREFIX_KEY = "prefix_";
     43 
     44     int mAppWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID;
     45     EditText mAppWidgetPrefix;
     46 
     47     public ExampleAppWidgetConfigure() {
     48         super();
     49     }
     50 
     51     @Override
     52     public void onCreate(Bundle icicle) {
     53         super.onCreate(icicle);
     54 
     55         // Set the result to CANCELED.  This will cause the widget host to cancel
     56         // out of the widget placement if they press the back button.
     57         setResult(RESULT_CANCELED);
     58 
     59         // Set the view layout resource to use.
     60         setContentView(R.layout.appwidget_configure);
     61 
     62         // Find the EditText
     63         mAppWidgetPrefix = (EditText)findViewById(R.id.appwidget_prefix);
     64 
     65         // Bind the action for the save button.
     66         findViewById(R.id.save_button).setOnClickListener(mOnClickListener);
     67 
     68         // Find the widget id from the intent.
     69         Intent intent = getIntent();
     70         Bundle extras = intent.getExtras();
     71         if (extras != null) {
     72             mAppWidgetId = extras.getInt(
     73                     AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
     74         }
     75 
     76         // If they gave us an intent without the widget id, just bail.
     77         if (mAppWidgetId == AppWidgetManager.INVALID_APPWIDGET_ID) {
     78             finish();
     79         }
     80 
     81         mAppWidgetPrefix.setText(loadTitlePref(ExampleAppWidgetConfigure.this, mAppWidgetId));
     82     }
     83 
     84     View.OnClickListener mOnClickListener = new View.OnClickListener() {
     85         public void onClick(View v) {
     86             final Context context = ExampleAppWidgetConfigure.this;
     87 
     88             // When the button is clicked, save the string in our prefs and return that they
     89             // clicked OK.
     90             String titlePrefix = mAppWidgetPrefix.getText().toString();
     91             saveTitlePref(context, mAppWidgetId, titlePrefix);
     92 
     93             // Push widget update to surface with newly set prefix
     94             AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
     95             ExampleAppWidgetProvider.updateAppWidget(context, appWidgetManager,
     96                     mAppWidgetId, titlePrefix);
     97 
     98             // Make sure we pass back the original appWidgetId
     99             Intent resultValue = new Intent();
    100             resultValue.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, mAppWidgetId);
    101             setResult(RESULT_OK, resultValue);
    102             finish();
    103         }
    104     };
    105 
    106     // Write the prefix to the SharedPreferences object for this widget
    107     static void saveTitlePref(Context context, int appWidgetId, String text) {
    108         SharedPreferences.Editor prefs = context.getSharedPreferences(PREFS_NAME, 0).edit();
    109         prefs.putString(PREF_PREFIX_KEY + appWidgetId, text);
    110         prefs.commit();
    111     }
    112 
    113     // Read the prefix from the SharedPreferences object for this widget.
    114     // If there is no preference saved, get the default from a resource
    115     static String loadTitlePref(Context context, int appWidgetId) {
    116         SharedPreferences prefs = context.getSharedPreferences(PREFS_NAME, 0);
    117         String prefix = prefs.getString(PREF_PREFIX_KEY + appWidgetId, null);
    118         if (prefix != null) {
    119             return prefix;
    120         } else {
    121             return context.getString(R.string.appwidget_prefix_default);
    122         }
    123     }
    124 
    125     static void deleteTitlePref(Context context, int appWidgetId) {
    126     }
    127 
    128     static void loadAllTitlePrefs(Context context, ArrayList<Integer> appWidgetIds,
    129             ArrayList<String> texts) {
    130     }
    131 }
    132 
    133 
    134 
    135