| /* |
| * 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; |
| |
| import com.example.android.apis.R; |
| |
| import android.app.Activity; |
| import android.content.Intent; |
| import android.content.SharedPreferences; |
| import android.os.Bundle; |
| import android.preference.PreferenceManager; |
| import android.view.View; |
| import android.view.View.OnClickListener; |
| import android.widget.Button; |
| import android.widget.LinearLayout; |
| import android.widget.TextView; |
| import android.widget.LinearLayout.LayoutParams; |
| |
| /** |
| * Demonstrates launching a PreferenceActivity and grabbing a value it saved. |
| */ |
| public class LaunchingPreferences extends Activity implements OnClickListener { |
| |
| private static final int REQUEST_CODE_PREFERENCES = 1; |
| |
| private TextView mCounterText; |
| |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| |
| /* |
| * If this were my app's main activity, I would load the default values |
| * so they're set even if the user does not go into the preferences |
| * screen. Another good place to call this method would be from a |
| * subclass of Application, so your default values would be loaded |
| * regardless of entry into your application (for example, a service or |
| * activity). |
| */ |
| PreferenceManager.setDefaultValues(this, R.xml.advanced_preferences, false); |
| |
| // Simple layout |
| LinearLayout layout = new LinearLayout(this); |
| layout.setOrientation(LinearLayout.VERTICAL); |
| setContentView(layout); |
| |
| // Create a simple button that will launch the preferences |
| Button launchPreferences = new Button(this); |
| launchPreferences.setText(getString(R.string.launch_preference_activity)); |
| launchPreferences.setOnClickListener(this); |
| layout.addView(launchPreferences, new LayoutParams(LayoutParams.FILL_PARENT, |
| LayoutParams.WRAP_CONTENT)); |
| |
| mCounterText = new TextView(this); |
| layout.addView(mCounterText, new LayoutParams(LayoutParams.FILL_PARENT, |
| LayoutParams.WRAP_CONTENT)); |
| |
| updateCounterText(); |
| } |
| |
| public void onClick(View v) { |
| |
| // When the button is clicked, launch an activity through this intent |
| Intent launchPreferencesIntent = new Intent().setClass(this, AdvancedPreferences.class); |
| |
| // Make it a subactivity so we know when it returns |
| startActivityForResult(launchPreferencesIntent, REQUEST_CODE_PREFERENCES); |
| } |
| |
| @Override |
| protected void onActivityResult(int requestCode, int resultCode, Intent data) { |
| super.onActivityResult(requestCode, resultCode, data); |
| |
| // The preferences returned if the request code is what we had given |
| // earlier in startSubActivity |
| if (requestCode == REQUEST_CODE_PREFERENCES) { |
| // Read a sample value they have set |
| updateCounterText(); |
| } |
| } |
| |
| private void updateCounterText() { |
| // Since we're in the same package, we can use this context to get |
| // the default shared preferences |
| SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(this); |
| final int counter = sharedPref.getInt(AdvancedPreferences.KEY_MY_PREFERENCE, 0); |
| mCounterText.setText(getString(R.string.counter_value_is) + " " + counter); |
| } |
| } |