原文发表于 Android猿
之前写过一篇文章：RxBus的实现及简单使用。今天我们尝试使用RxBus动态切换主题。
一、定义主题颜色
color.xml
#F44336
#D32F2F
#F44336
#E91E63
#C2185B
#E91E63
#795548
#5D4037
#795548
#2196F3
#1976D2
#2196F3
#607D8B
#455A64
#607D8B
#FFEB3B
#FBC02D
#FFEB3B
#673AB7
#512DA8
#673AB7
#4CAF50
#388E3C
#4CAF50
#FF5722
#E64A19
#FF5722
#9E9E9E
#616161
#9E9E9E
#00BCD4
#0097A7
#00BCD4
#FFC107
#FFA000
#FFC107
#2196F3
#1E88E5
@color/primary
二、定义主题样式
styles.xml
三、在需要的地方弹出主题选择对话框
private void showThemeChooseDialog() {
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("设置主题");
Integer[] res = new Integer[]{R.drawable.red_round, R.drawable.brown_round, R.drawable.blue_round,
R.drawable.blue_grey_round, R.drawable.yellow_round, R.drawable.deep_purple_round,
R.drawable.pink_round, R.drawable.green_round, R.drawable.deep_orange_round,
R.drawable.grey_round, R.drawable.cyan_round};
List list = Arrays.asList(res);
ColorsListAdapter adapter = new ColorsListAdapter(MainActivity.this, list);
adapter.setCheckItem(MyThemeUtils.getCurrentTheme(MainActivity.this).getIntValue());
GridView gridView = (GridView) LayoutInflater.from(MainActivity.this).inflate(R.layout.colors_panel_layout, null);
gridView.setStretchMode(GridView.STRETCH_COLUMN_WIDTH);
gridView.setCacheColorHint(0);
gridView.setAdapter(adapter);
builder.setView(gridView);
final AlertDialog dialog = builder.show();
gridView.setOnItemClickListener(
new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView parent, View view, int position, long id) {
dialog.dismiss();
int value = MyThemeUtils.getCurrentTheme(MainActivity.this).getIntValue();
if (value != position) {
PreferenceUtils.getInstance(MainActivity.this).saveParam("change_theme_key", position);
changeTheme(MyThemeUtils.Theme.mapValueToTheme(position));
}
}
}
);
}
对话框圆形颜色选项
在drawable下新建red_round.xml,其他主题颜色类似
四、ColorsListAdapter、colors_image_layout.xml，主题选择框中颜色适配器及其xml
ColorsListAdapter
public class ColorsListAdapter extends BaseAdapter {
private int checkItem;
Context context;
List list;
public ColorsListAdapter(Context context, List list) {
this.context = context;
this.list = list;
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Holder holder;
if (convertView == null) {
convertView = LayoutInflater.from(context).inflate(R.layout.colors_image_layout, null);
holder = new Holder();
holder.imageView1 = (ImageView) convertView.findViewById(R.id.img_1);
holder.imageView2 = (ImageView) convertView.findViewById(R.id.img_2);
convertView.setTag(holder);
} else {
holder = (Holder) convertView.getTag();
}
holder.imageView1.setImageResource(list.get(position));
if (checkItem == position) {
holder.imageView2.setImageResource(R.drawable.ic_done_white);
}
return convertView;
}
public void setCheckItem(int checkItem) {
this.checkItem = checkItem;
}
static class Holder {
ImageView imageView1;
ImageView imageView2;
}
}
colors_image_layout.xml
五、使用RxBus发布事件和处理事件
发布
private void changeTheme(MyThemeUtils.Theme theme) {
RxBus.getInstance().post(new RxbusEvent(theme));
}
接收
rxSbscription=RxBus.getInstance().toObserverable(RxbusEvent.class)
.subscribe(new Action1() {
@Override
public void call(RxbusEvent rxbusEvent) {
changeTheme(rxbusEvent.getTheme());
}
});
六、用到的工具类
PreferenceUtils
public class PreferenceUtils {
private SharedPreferences sharedPreferences;
private SharedPreferences.Editor shareEditor;
private static PreferenceUtils preferenceUtils = null;
public static final String NOTE_TYPE_KEY = "NOTE_TYPE_KEY";
public static final String EVERNOTE_ACCOUNT_KEY = "EVERNOTE_ACCOUNT_KEY";
public static final String EVERNOTE_NOTEBOOK_GUID_KEY = "EVERNOTE_NOTEBOOK_GUID_KEY";
private PreferenceUtils(Context context){
sharedPreferences = context.getSharedPreferences("ThemeSetting", Context.MODE_PRIVATE);
shareEditor = sharedPreferences.edit();
}
public static PreferenceUtils getInstance(Context context){
if (preferenceUtils == null) {
synchronized (PreferenceUtils.class) {
if (preferenceUtils == null) {
preferenceUtils = new PreferenceUtils(context.getApplicationContext());
}
}
}
return preferenceUtils;
}
public String getStringParam(String key){
return getStringParam(key, "");
}
public String getStringParam(String key, String defaultString){
return sharedPreferences.getString(key, defaultString);
}
public void saveParam(String key, String value)
{
shareEditor.putString(key,value).commit();
}
public boolean getBooleanParam(String key){
return getBooleanParam(key, false);
}
public boolean getBooleanParam(String key, boolean defaultBool){
return sharedPreferences.getBoolean(key, defaultBool);
}
public void saveParam(String key, boolean value){
shareEditor.putBoolean(key, value).commit();
}
public int getIntParam(String key){
return getIntParam(key, 0);
}
public int getIntParam(String key, int defaultInt){
return sharedPreferences.getInt(key, defaultInt);
}
public void saveParam(String key, int value){
shareEditor.putInt(key, value).commit();
}
public long getLongParam(String key){
return getLongParam(key, 0);
}
public long getLongParam(String key, long defaultInt){
return sharedPreferences.getLong(key, defaultInt);
}
public void saveParam(String key, long value){
shareEditor.putLong(key, value).commit();
}
public void removeKey(String key){
shareEditor.remove(key).commit();
}
}
MyThemeUtils
public class MyThemeUtils {
public static void changTheme(Activity activity, Theme theme) {
if (activity == null)
return;
int style = R.style.RedTheme;
switch (theme) {
case BROWN:
style = R.style.BrownTheme;
break;
case BLUE:
style = R.style.BlueTheme;
break;
case BLUE_GREY:
style = R.style.BlueGreyTheme;
break;
case YELLOW:
style = R.style.YellowTheme;
break;
case DEEP_PURPLE:
style = R.style.DeepPurpleTheme;
break;
case PINK:
style = R.style.PinkTheme;
break;
case GREEN:
style = R.style.GreenTheme;
break;
case DEEP_ORANGE:
style = R.style.DeepOrangeTheme;
break;
case GREY:
style = R.style.GreyTheme;
break;
case CYAN:
style = R.style.CyanTheme;
break;
case AMBER:
style = R.style.AmberTheme;
break;
default:
break;
}
activity.setTheme(style);
}
public static Theme getCurrentTheme(Context context) {
int value = PreferenceUtils.getInstance(context)
.getIntParam("change_theme_key", 0);
return MyThemeUtils.Theme.mapValueToTheme(value);
}
public enum Theme {
RED(0),
BROWN(1),
BLUE(2),
BLUE_GREY(3),
YELLOW(4),
DEEP_PURPLE(5),
PINK(6),
GREEN(7),
DEEP_ORANGE(8),
GREY(9),
CYAN(10),
AMBER(11);
private int mValue;
Theme(int value) {
this.mValue = value;
}
public static Theme mapValueToTheme(final int value) {
for (Theme theme : Theme.values()) {
if (value == theme.getIntValue()) {
return theme;
}
}
// If run here, return default
return RED;
}
static Theme getDefault() {
return RED;
}
public int getIntValue() {
return mValue;
}
}
}
基类BaseActivity，主题的初始化。注意，需要变换主题的Activity需继承BaseActivity
public class BaseActivity extends AppCompatActivity {
protected PreferenceUtils preferenceUtils;
@Override
protected void onCreate(Bundle savedInstanceState) {
preferenceUtils = PreferenceUtils.getInstance(this);
initTheme();
super.onCreate(savedInstanceState);
}
private void initTheme() {
MyThemeUtils.Theme theme = MyThemeUtils.getCurrentTheme(this);
MyThemeUtils.changTheme(this, theme);
}
}
参考：
https://github.com/lguipeng/Notes