1 /* 2 * Copyright 2013 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.textswitcher; 18 19 import android.app.Activity; 20 import android.os.Bundle; 21 import android.view.Gravity; 22 import android.view.View; 23 import android.view.animation.Animation; 24 import android.view.animation.AnimationUtils; 25 import android.widget.Button; 26 import android.widget.TextSwitcher; 27 import android.widget.TextView; 28 import android.widget.ViewSwitcher.ViewFactory; 29 30 /** 31 * This sample shows the use of the {@link android.widget.TextSwitcher} View with animations. A 32 * {@link android.widget.TextSwitcher} is a special type of {@link android.widget.ViewSwitcher} that animates 33 * the current text out and new text in when 34 * {@link android.widget.TextSwitcher#setText(CharSequence)} is called. 35 */ 36 public class MainActivity extends Activity { 37 private TextSwitcher mSwitcher; 38 private int mCounter = 0; 39 40 @Override 41 protected void onCreate(Bundle savedInstanceState) { 42 super.onCreate(savedInstanceState); 43 setContentView(R.layout.sample_main); 44 45 // Get the TextSwitcher view from the layout 46 mSwitcher = (TextSwitcher) findViewById(R.id.switcher); 47 48 // BEGIN_INCLUDE(setup) 49 // Set the factory used to create TextViews to switch between. 50 mSwitcher.setFactory(mFactory); 51 52 /* 53 * Set the in and out animations. Using the fade_in/out animations 54 * provided by the framework. 55 */ 56 Animation in = AnimationUtils.loadAnimation(this, 57 android.R.anim.fade_in); 58 Animation out = AnimationUtils.loadAnimation(this, 59 android.R.anim.fade_out); 60 mSwitcher.setInAnimation(in); 61 mSwitcher.setOutAnimation(out); 62 // END_INCLUDE(setup) 63 64 /* 65 * Setup the 'next' button. The counter is incremented when clicked and 66 * the new value is displayed in the TextSwitcher. The change of text is 67 * automatically animated using the in/out animations set above. 68 */ 69 Button nextButton = (Button) findViewById(R.id.button); 70 nextButton.setOnClickListener(new View.OnClickListener() { 71 72 @Override 73 public void onClick(View v) { 74 mCounter++; 75 // BEGIN_INCLUDE(settext) 76 mSwitcher.setText(String.valueOf(mCounter)); 77 // END_INCLUDE(settext) 78 } 79 }); 80 81 // Set the initial text without an animation 82 mSwitcher.setCurrentText(String.valueOf(mCounter)); 83 84 } 85 86 // BEGIN_INCLUDE(factory) 87 /** 88 * The {@link android.widget.ViewSwitcher.ViewFactory} used to create {@link android.widget.TextView}s that the 89 * {@link android.widget.TextSwitcher} will switch between. 90 */ 91 private ViewFactory mFactory = new ViewFactory() { 92 93 @Override 94 public View makeView() { 95 96 // Create a new TextView 97 TextView t = new TextView(MainActivity.this); 98 t.setGravity(Gravity.TOP | Gravity.CENTER_HORIZONTAL); 99 t.setTextAppearance(MainActivity.this, android.R.style.TextAppearance_Large); 100 return t; 101 } 102 }; 103 // END_INCLUDE(factory) 104 } 105
