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/*
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* 注意：此代码段的版权归 MiCode 开源社区所有（www.micode.net）
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* 本代码遵循 Apache 2.0 许可证，您可以在 http://www.apache.org/licenses/LICENSE-2.0 查看许可证内容。
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*/
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package net.micode.notes.widget;
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import android.app.PendingIntent;
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import android.appwidget.AppWidgetManager;
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import android.appwidget.AppWidgetProvider;
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import android.content.ContentValues;
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import android.content.Context;
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import android.content.Intent;
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import android.database.Cursor;
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import android.util.Log;
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import android.widget.RemoteViews;
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import net.micode.notes.R;
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import net.micode.notes.data.Notes;
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import net.micode.notes.data.Notes.NoteColumns;
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import net.micode.notes.tool.ResourceParser;
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import net.micode.notes.ui.NoteEditActivity;
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import net.micode.notes.ui.NotesListActivity;
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/**
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* 笔记小部件提供者抽象类，扩展自AppWidgetProvider，用于管理和更新笔记小部件的内容。
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*/
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public abstract class NoteWidgetProvider extends AppWidgetProvider {
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// 查询笔记时用到的列名数组
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public static final String[] PROJECTION = new String[]{
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NoteColumns.ID,
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NoteColumns.BG_COLOR_ID,
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NoteColumns.SNIPPET
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};
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// 列的索引常量
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public static final int COLUMN_ID = 0;
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public static final int COLUMN_BG_COLOR_ID = 1;
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public static final int COLUMN_SNIPPET = 2;
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// 日志标签
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private static final String TAG = "NoteWidgetProvider";
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/**
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* 当小部件被删除时调用，更新数据库中对应小部件的ID为无效ID。
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*/
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@Override
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public void onDeleted(Context context, int[] appWidgetIds) {
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ContentValues values = new ContentValues();
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values.put(NoteColumns.WIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
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for (int i = 0; i < appWidgetIds.length; i++) {
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context.getContentResolver().update(Notes.CONTENT_NOTE_URI,
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values,
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NoteColumns.WIDGET_ID + "=?",
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new String[]{String.valueOf(appWidgetIds[i])});
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}
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}
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/**
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* 根据小部件ID查询对应的笔记信息。
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*
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* @param context 上下文
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* @param widgetId 小部件ID
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* @return 返回查询到的Cursor对象，包含笔记的摘要、背景ID等信息。
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*/
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private Cursor getNoteWidgetInfo(Context context, int widgetId) {
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return context.getContentResolver().query(Notes.CONTENT_NOTE_URI,
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PROJECTION,
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NoteColumns.WIDGET_ID + "=? AND " + NoteColumns.PARENT_ID + "<>?",
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new String[]{String.valueOf(widgetId), String.valueOf(Notes.ID_TRASH_FOLER)},
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null);
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}
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/**
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* 更新小部件显示内容的通用方法。
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*
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* @param context 上下文
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* @param appWidgetManager AppWidget管理器
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* @param appWidgetIds 小部件ID数组
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*/
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protected void update(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
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update(context, appWidgetManager, appWidgetIds, false);
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}
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/**
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* 根据是否隐私模式更新小部件显示内容。
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*
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* @param context 上下文
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* @param appWidgetManager AppWidget管理器
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* @param appWidgetIds 小部件ID数组
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* @param privacyMode 是否为隐私模式
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*/
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private void update(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds,
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boolean privacyMode) {
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for (int i = 0; i < appWidgetIds.length; i++) {
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if (appWidgetIds[i] != AppWidgetManager.INVALID_APPWIDGET_ID) {
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int bgId = ResourceParser.getDefaultBgId(context);
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String snippet = "";
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Intent intent = new Intent(context, NoteEditActivity.class);
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intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
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intent.putExtra(Notes.INTENT_EXTRA_WIDGET_ID, appWidgetIds[i]);
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intent.putExtra(Notes.INTENT_EXTRA_WIDGET_TYPE, getWidgetType());
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Cursor c = getNoteWidgetInfo(context, appWidgetIds[i]);
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if (c != null && c.moveToFirst()) {
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if (c.getCount() > 1) {
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Log.e(TAG, "Multiple message with same widget id:" + appWidgetIds[i]);
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c.close();
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return;
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}
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snippet = c.getString(COLUMN_SNIPPET);
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bgId = c.getInt(COLUMN_BG_COLOR_ID);
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intent.putExtra(Intent.EXTRA_UID, c.getLong(COLUMN_ID));
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intent.setAction(Intent.ACTION_VIEW);
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} else {
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snippet = context.getResources().getString(R.string.widget_havenot_content);
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intent.setAction(Intent.ACTION_INSERT_OR_EDIT);
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}
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if (c != null) {
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c.close();
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}
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RemoteViews rv = new RemoteViews(context.getPackageName(), getLayoutId());
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rv.setImageViewResource(R.id.widget_bg_image, getBgResourceId(bgId));
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intent.putExtra(Notes.INTENT_EXTRA_BACKGROUND_ID, bgId);
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// 为小部件的点击事件设置PendingIntent
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PendingIntent pendingIntent = null;
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if (privacyMode) {
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rv.setTextViewText(R.id.widget_text,
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context.getString(R.string.widget_under_visit_mode));
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pendingIntent = PendingIntent.getActivity(context, appWidgetIds[i], new Intent(
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context, NotesListActivity.class), PendingIntent.FLAG_UPDATE_CURRENT);
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} else {
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rv.setTextViewText(R.id.widget_text, snippet);
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pendingIntent = PendingIntent.getActivity(context, appWidgetIds[i], intent,
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PendingIntent.FLAG_UPDATE_CURRENT);
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}
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rv.setOnClickPendingIntent(R.id.widget_text, pendingIntent);
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appWidgetManager.updateAppWidget(appWidgetIds[i], rv);
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}
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}
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}
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/**
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* 获取背景资源的ID。
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*
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* @param bgId 背景ID
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* @return 返回对应的资源ID
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*/
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protected abstract int getBgResourceId(int bgId);
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/**
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* 获取小部件布局的ID。
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*
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* @return 返回布局的资源ID
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*/
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protected abstract int getLayoutId();
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/**
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* 获取小部件的类型。
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*
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* @return 返回小部件的类型
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*/
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protected abstract int getWidgetType();
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}
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王培盟
7 months ago