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Here is a short list of links related to this Android PersistentState.java source code file:
Android example source code file (PersistentState.java)
The PersistentState.java Android example source code/* * Copyright (C) 2007 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.example.android.apis.app; // Need the following import to get access to the app resources, since this // class is in a sub-package. import com.example.android.apis.R; import android.app.Activity; import android.content.SharedPreferences; import android.os.Bundle; import android.widget.EditText; import android.widget.TextView; /** * Simple example of using persistent preferences to retain a screen's state. * <p>This can be used as an alternative to the normal * <code>onSaveInstanceState() mechanism, if you * wish the state to persist even after an activity is finished.</p> * * <p>Note that using this approach requires more care, since you are sharing * the persistent state potentially across multiple instances of the activity. * In particular, if you allow a new instance of the activity to be launched * directly on top of the existing instance, the state can get out of sync * because the new instance is resumed before the old one is paused.</p> * * <p>For any persistent state that is not simplistic, a content * provider is often a better choice.</p> * * <p>In this example we are currently saving and restoring the state of the * top text editor, but not of the bottom text editor. You can see the difference * by editing the two text fields, then going back from the activity and * starting it again.</p> * * <h4>Demo * App/Activity/Save & Restore State * * <h4>Source files * <table class="LinkTable"> * <tr> * <td class="LinkColumn">src/com.example.android.apis/app/PersistentState.java |
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