Android 学习笔记之切换主题

须知少年凌云志，曾许人间第一流。这篇文章主要讲述Android 学习笔记之切换主题相关的知识，希望能为你提供帮助。
首先要有主题颜色
theme_color.xml

1 < ?xml version="1.0" encoding="utf-8"?> 2 < resources> 3 4< !--红--> 5< color name="red"> #FF6347< /color> 6< color name="dark_red"> #F4511E< /color> 7< color name="accent_red"> #FF5722< /color> 8 9< !--棕--> 10< color name="brown"> #795548< /color> 11< color name="dark_brown"> #5D4037< /color> 12< color name="accent_brown"> #795548< /color> 13 14< !--蓝--> 15< color name="blue"> #3F51B5< /color> 16< color name="dark_blue"> #303F9F< /color> 17< color name="accent_blue"> #3F51B5< /color> 18 19< !--蓝灰--> 20< color name="blue_grey"> #607D8B< /color> 21< color name="dark_blue_grey"> #455A64< /color> 22< color name="accent_blue_grey"> #607D8B< /color> 23 24< !--黄--> 25< color name="yellow"> #FF9800< /color> 26< color name="dark_yellow"> #F57C00< /color> 27< color name="accent_yellow"> #FF9800< /color> 28 29< !--紫--> 30< color name="deep_purple"> #673AB7< /color> 31< color name="dark_deep_purple"> #512DA8< /color> 32< color name="accent_deep_purple"> #7C4DFF< /color> 33 34< !--粉红--> 35< color name="pink"> #E91E63< /color> 36< color name="dark_pink"> #C2185B< /color> 37< color name="accent_pink"> #FF5722< /color> 38 39< !--绿--> 40< color name="green"> #4CAF50< /color> 41< color name="dark_green"> #388E3C< /color> 42< color name="accent_green"> #4CAF50< /color> 43 44 < /resources>

以及主题
theme_syyles.xml

1 < ?xml version="1.0" encoding="utf-8"?> 2 < resources> 3 4< !--< style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar"> --> 5< !--< item name="android:textColorPrimary"> @color/text_black< /item> --> 6< !--& lt; !& ndash; 主背景色& ndash; & gt; --> 7< !--< item name="android:windowBackground"> @android:color/white< /item> --> 8< !--< /style> --> 9 10< !--蓝色主题--> 11< style name="BlueTheme" parent="AppTheme"> 12< item name="colorPrimary"> @color/blue< /item> 13< item name="colorPrimaryDark"> @color/dark_blue< /item> 14< item name="colorAccent"> @color/accent_blue< /item> 15< /style> 16 17< !--蓝灰色主题--> 18< style name="BlueGreyTheme" parent="AppTheme"> 19< item name="colorPrimary"> @color/blue_grey< /item> 20< item name="colorPrimaryDark"> @color/dark_blue_grey< /item> 21< item name="colorAccent"> @color/accent_blue_grey< /item> 22< /style> 23 24< !--红色主题--> 25< style name="RedTheme" parent="AppTheme"> 26< item name="colorPrimary"> @color/red< /item> 27< item name="colorPrimaryDark"> @color/dark_red< /item> 28< item name="colorAccent"> @color/accent_red< /item> 29< /style> 30 31< !--棕色主题--> 32< style name="BrownTheme" parent="AppTheme"> 33< item name="colorPrimary"> @color/brown< /item> 34< item name="colorPrimaryDark"> @color/dark_brown< /item> 35< item name="colorAccent"> @color/accent_brown< /item> 36< /style> 37 38< !--黄色主题--> 39< style name="YellowTheme" parent="AppTheme"> 40< item name="colorPrimary"> @color/yellow< /item> 41< item name="colorPrimaryDark"> @color/dark_yellow< /item> 42< item name="colorAccent"> @color/accent_yellow< /item> 43< /style> 44 45< !--紫色主题--> 46< style name="DeepPurpleTheme" parent="AppTheme"> 47< item name="colorPrimary"> @color/deep_purple< /item> 48< item name="colorPrimaryDark"> @color/dark_deep_purple< /item> 49< item name="colorAccent"> @color/accent_deep_purple< /item> 50< /style> 51 52< !--粉红色主题--> 53< style name="PinkTheme" parent="AppTheme"> 54< item name="colorPrimary"> @color/pink< /item> 55< item name="colorPrimaryDark"> @color/dark_pink< /item> 56< item name="colorAccent"> @color/accent_pink< /item> 57< /style> 58 59< !--绿色主题--> 60< style name="GreenTheme" parent="AppTheme"> 61< item name="colorPrimary"> @color/green< /item> 62< item name="colorPrimaryDark"> @color/dark_green< /item> 63< item name="colorAccent"> @color/accent_green< /item> 64< /style> 65 < /resources>

MainActivity.java

1 package com.example.myapplication; 2 3 import android.content.Intent; 4 import android.support.v7.app.AlertDialog; 5 import android.support.v7.app.AppCompatActivity; 6 import android.os.Bundle; 7 import android.view.LayoutInflater; 8 import android.view.View; 9 import android.view.ViewGroup; 10 import android.widget.AdapterView; 11 import android.widget.BaseAdapter; 12 import android.widget.GridView; 13 import android.widget.ImageView; 14 15 import java.util.ArrayList; 16 import java.util.List; 17 18 public class MainActivity extends AppCompatActivity { 19private List< Integer> listColor= new ArrayList(); ; 20@Override 21protected void onCreate(Bundle savedInstanceState) { 22ThemeUtils.changTheme(this); 23super.onCreate(savedInstanceState); 24setContentView(R.layout.activity_main); 25findViewById(R.id.button).setOnClickListener(new View.OnClickListener() { 26@Override 27public void onClick(View view) { 28initt(); 29} 30}); 31 32} 33 34/** 35* 方法 36*/ 37private void initt() { 38//为LIST添加数值 39listColor.add(R.color.red); 40listColor.add(R.color.brown); 41listColor.add(R.color.blue); 42listColor.add(R.color.blue_grey); 43listColor.add(R.color.yellow); 44listColor.add(R.color.deep_purple); 45listColor.add(R.color.pink); 46listColor.add(R.color.green); 47//构建对话框 48AlertDialog.Builder alertdoalog = new AlertDialog.Builder(this); 49alertdoalog.setTitle("切换主题"); 50//绑定布局 51View view = LayoutInflater.from(this).inflate(R.layout.theme_colors_panel_layout,null); 52//初始化网格视图 53GridView gridview = (GridView) view.findViewById(R.id.grid); 54//填充Adapter 55ThemeAdapterthemeadapter = new ThemeAdapter(MainActivity.this,listColor,R.layout.theme_colors_image_layout); 56//set当前点击 57themeadapter.setCheckItem((Integer) SharedPreferenceUtil.get(this,"key",0)); 58 59gridview.setAdapter(themeadapter); 60gridview.setOnItemClickListener(new AdapterView.OnItemClickListener() { 61@Override 62public void onItemClick(AdapterView< ?> adapterView, View view, int i, long l) { 63//保存当前点击 64SharedPreferenceUtil.put(MainActivity.this,"key",i); 65//重新启动 66startActivity(new Intent(MainActivity.this,MainActivity.class)); 67//关闭 68finish(); 69} 70}); 71alertdoalog.setView(view); 72alertdoalog.show(); 73} 74 }

ThemeUtils.java

1 package com.example.myapplication; 2 3 import android.app.Activity; 4 5 /** 6* 主题工具类 7*/ 8 public class ThemeUtils { 9 10/** 11* 修改主题 12* @param activity 13*/ 14public static void changTheme(Activity activity){ 15if (activity == null) 16return; 17 18int position = (int) SharedPreferenceUtil.get(activity,"key", 0); 19int style = R.style.BlueTheme; 20switch (position){ 21case 0: 22style = R.style.YellowTheme; 23break; 24case 1: 25style = R.style.BrownTheme; 26break; 27case 2: 28style = R.style.BlueTheme; 29break; 30case 3: 31style = R.style.BlueGreyTheme; 32break; 33case 4: 34style = R.style.YellowTheme; 35break; 36case 5: 37style = R.style.DeepPurpleTheme; 38break; 39case 6: 40style = R.style.PinkTheme; 41break; 42case 7: 43style = R.style.GreenTheme; 44break; 45default: 46break; 47} 48activity.setTheme(style); 49} 50 51 }

SharedPreferenceUtil.java

package com.example.myapplication; import android.content.Context; import android.content.SharedPreferences; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.util.Map; /** * Stayhungry , Stayfoolish * Copyright(c) 2016 www.wuxianedu.com Inc. All rights reserved. */ public class SharedPreferenceUtil { public static final String FILE_NAME = "share_data"; // SharedPreference操作的文件/** * 保存数据的方法，我们需要拿到保存数据的具体类型，然后根据类型调用不同的保存方法 * @param context * @param key * @param object */ public static void put(Context context, String key, Object object) {SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE); SharedPreferences.Editor editor = sp.edit(); if (object instanceof String) { editor.putString(key, (String) object); } else if (object instanceof Integer) { editor.putInt(key, (Integer) object); } else if (object instanceof Boolean) { editor.putBoolean(key, (Boolean) object); } else if (object instanceof Float) { editor.putFloat(key, (Float) object); } else if (object instanceof Long) { editor.putLong(key, (Long) object); } else { editor.putString(key, object.toString()); }SharedPreferencesCompat.apply(editor); }/** * 得到保存数据的方法，我们根据默认值得到保存的数据的具体类型，然后调用相对于的方法获取值 * * @param context * @param key * @param defaultObject * @return */ public static Object get(Context context, String key, Object defaultObject) { SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE); if (defaultObject instanceof String || defaultObject==null) { return sp.getString(key, (String) defaultObject); } else if (defaultObject instanceof Integer) { return sp.getInt(key, (Integer) defaultObject); } else if (defaultObject instanceof Boolean) { return sp.getBoolean(key, (Boolean) defaultObject); } else if (defaultObject instanceof Float) { return sp.getFloat(key, (Float) defaultObject); } else if (defaultObject instanceof Long) { return sp.getLong(key, (Long) defaultObject); } return null; }/** * 移除某个key值已经对应的值 * * @param context * @param key */ public static void remove(Context context, String key) { SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE); SharedPreferences.Editor editor = sp.edit(); editor.remove(key); SharedPreferencesCompat.apply(editor); }/** * 返回所有的键值对 * * @param context * @return */ public static Map< String, ?> getAll(Context context) { SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE); return sp.getAll(); }/** * 清除所有数据 * * @param context */ public static void clearAll(Context context) { SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE); SharedPreferences.Editor editor = sp.edit(); editor.clear(); SharedPreferencesCompat.apply(editor); }/** * 查询某个key是否已经存在 * * @param context * @param key * @return */ public static boolean contains(Context context, String key) { SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE); return sp.contains(key); }/** * 创建一个解决SharedPreferencesCompat.apply方法的一个兼容类 */ private static class SharedPreferencesCompat { private static final Method sApplyMethod = findApplyMethod(); /** * 反射查找apply的方法 * @return */ @SuppressWarnings({ "unchecked", "rawtypes" }) private static Method findApplyMethod() { try { Class clz = SharedPreferences.Editor.class; return clz.getMethod("apply"); } catch (NoSuchMethodException e) { }return null; }/** * 如果找到则使用apply执行，否则使用commit * * 里面所有的commit操作使用了SharedPreferencesCompat.apply进行了替代，目的是尽可能的使用apply代替commit * 首先说下为什么，因为commit方法是同步的，并且我们很多时候的commit操作都是UI线程中，毕竟是IO操作，尽可能异步； * 所以我们使用apply进行替代，apply异步的进行写入； * @param editor */ public static void apply(SharedPreferences.Editor editor) { try { if (sApplyMethod != null) { sApplyMethod.invoke(editor); return; } } catch (IllegalArgumentException e) { } catch (IllegalAccessException e) { } catch (InvocationTargetException e) { } editor.commit(); } } }

ThemeAdapter.java

1 package com.example.myapplication; 2 3 import android.content.Context; 4 import android.view.LayoutInflater; 5 import android.view.View; 6 import android.view.ViewGroup; 7 import android.widget.BaseAdapter; 8 import android.widget.ImageView; 9 10 import java.util.List; 11 12 /** 13* Created by Administrator on 2016/12/5. 14*/ 15 public class ThemeAdapter extends BaseCustomAdapter { 16private int checkItem; 17public ThemeAdapter(Context context, List data, int layoutResId) { 18super(context, data, layoutResId); 19} 20 21@Override 22public View getCustomView(int position, View convertView) { 23ImageView imageView1 = (ImageView) convertView.findViewById(R.id.img_1); 24ImageView imageView2 = (ImageView) convertView.findViewById(R.id.img_2); 25imageView1.setImageResource((Integer) data.get(position)); 26if(checkItem == position){ 27imageView2.setImageResource(R.mipmap.ic_done_white); 28} 29return convertView; 30} 31 32public void setCheckItem(int checkItem) { 33this.checkItem = checkItem; 34} 35 }

BaseCustomAdapter.java

1 package com.example.myapplication; 2 3 import android.content.Context; 4 import android.view.LayoutInflater; 5 import android.view.View; 6 import android.view.ViewGroup; 7 import android.widget.BaseAdapter; 8 9 10 import java.util.List; 11 12 /** 13* 14* 15* 2015年10月26日,0026. 16* 所有BaseAdapter的直接父类 17* @param < E> 18*/ 19 public abstract class BaseCustomAdapter< E> extends BaseAdapter { 20 21protected LayoutInflater layoutInflater; 22 23protected List< E> data; 24 25protected int layoutResId; // item id 26 27public BaseCustomAdapter(Context context, List< E> data, int layoutResId) { 28this.layoutResId = layoutResId; 29this.data=https://www.songbingjia.com/android/data; 30this.layoutInflater = LayoutInflater.from(context); 31} 32 33 34 35public void addAll(List< E> data){ 36this.data.addAll(data); 37notifyDataSetChanged(); 38 39} 40 41public void addAll(int location,List< E> data){ 42this.data.addAll(location, data); 43notifyDataSetChanged(); 44} 45 46public void add(E e){ 47this.data.add(e); 48notifyDataSetChanged(); 49} 50 51public void add(int location,E e){ 52this.data.add(location, e); 53notifyDataSetChanged(); 54} 55 56public void remove(int location){ 57this.data.remove(location); 58notifyDataSetChanged(); 59} 60 61public void remove(E e){ 62this.data.remove(e); 63notifyDataSetChanged(); 64} 65 66public void removeAll(List< E> data){ 67this.data.removeAll(data); 68notifyDataSetChanged(); 69} 70 71@Override 72public int getCount() { 73return data.size(); 74} 75 76@Override 77public E getItem(int position) { 78return data.get(position); 79} 80 81@Override 82public long getItemId(int position) { 83return position; 84} 85 86@Override 87public View getView(int position, View convertView, ViewGroup parent) { 88if(convertView == null){ 89convertView = layoutInflater.inflate(layoutResId,null); 90getListener(convertView); 91} 92getCustomView(position, convertView); 93return convertView; 94} 95 96public abstract View getCustomView(int position, View convertView); 97 98/** 99* 如果需要点击事件重写此方法 100*/ 101protected void getListener(View convertView){} 102 }

【Android 学习笔记之切换主题】 好了，到这里切换主题就可以实现了