| /* |
| * Copyright (C) 2006 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 android.view; |
| |
| import android.annotation.StyleRes; |
| import android.content.Context; |
| import android.content.ContextWrapper; |
| import android.content.res.Configuration; |
| import android.content.res.Resources; |
| |
| /** |
| * A ContextWrapper that allows you to modify the theme from what is in the |
| * wrapped context. |
| */ |
| public class ContextThemeWrapper extends ContextWrapper { |
| private int mThemeResource; |
| private Resources.Theme mTheme; |
| private LayoutInflater mInflater; |
| private Configuration mOverrideConfiguration; |
| private Resources mResources; |
| |
| public ContextThemeWrapper() { |
| super(null); |
| } |
| |
| public ContextThemeWrapper(Context base, @StyleRes int themeResId) { |
| super(base); |
| mThemeResource = themeResId; |
| } |
| |
| public ContextThemeWrapper(Context base, Resources.Theme theme) { |
| super(base); |
| mTheme = theme; |
| } |
| |
| @Override |
| protected void attachBaseContext(Context newBase) { |
| super.attachBaseContext(newBase); |
| } |
| |
| /** |
| * Call to set an "override configuration" on this context -- this is |
| * a configuration that replies one or more values of the standard |
| * configuration that is applied to the context. See |
| * {@link Context#createConfigurationContext(Configuration)} for more |
| * information. |
| * |
| * <p>This method can only be called once, and must be called before any |
| * calls to {@link #getResources()} are made. |
| */ |
| public void applyOverrideConfiguration(Configuration overrideConfiguration) { |
| if (mResources != null) { |
| throw new IllegalStateException("getResources() has already been called"); |
| } |
| if (mOverrideConfiguration != null) { |
| throw new IllegalStateException("Override configuration has already been set"); |
| } |
| mOverrideConfiguration = new Configuration(overrideConfiguration); |
| } |
| |
| @Override |
| public Resources getResources() { |
| if (mResources != null) { |
| return mResources; |
| } |
| if (mOverrideConfiguration == null) { |
| mResources = super.getResources(); |
| return mResources; |
| } else { |
| Context resc = createConfigurationContext(mOverrideConfiguration); |
| mResources = resc.getResources(); |
| return mResources; |
| } |
| } |
| |
| @Override |
| public void setTheme(int resid) { |
| if (mThemeResource != resid) { |
| mThemeResource = resid; |
| initializeTheme(); |
| } |
| } |
| |
| /** @hide */ |
| @Override |
| public int getThemeResId() { |
| return mThemeResource; |
| } |
| |
| @Override public Resources.Theme getTheme() { |
| if (mTheme != null) { |
| return mTheme; |
| } |
| |
| mThemeResource = Resources.selectDefaultTheme(mThemeResource, |
| getApplicationInfo().targetSdkVersion); |
| initializeTheme(); |
| |
| return mTheme; |
| } |
| |
| @Override public Object getSystemService(String name) { |
| if (LAYOUT_INFLATER_SERVICE.equals(name)) { |
| if (mInflater == null) { |
| mInflater = LayoutInflater.from(getBaseContext()).cloneInContext(this); |
| } |
| return mInflater; |
| } |
| return getBaseContext().getSystemService(name); |
| } |
| |
| /** |
| * Called by {@link #setTheme} and {@link #getTheme} to apply a theme |
| * resource to the current Theme object. Can override to change the |
| * default (simple) behavior. This method will not be called in multiple |
| * threads simultaneously. |
| * |
| * @param theme The Theme object being modified. |
| * @param resid The theme style resource being applied to <var>theme</var>. |
| * @param first Set to true if this is the first time a style is being |
| * applied to <var>theme</var>. |
| */ |
| protected void onApplyThemeResource(Resources.Theme theme, int resid, boolean first) { |
| theme.applyStyle(resid, true); |
| } |
| |
| private void initializeTheme() { |
| final boolean first = mTheme == null; |
| if (first) { |
| mTheme = getResources().newTheme(); |
| Resources.Theme theme = getBaseContext().getTheme(); |
| if (theme != null) { |
| mTheme.setTo(theme); |
| } |
| } |
| onApplyThemeResource(mTheme, mThemeResource, first); |
| } |
| } |
| |