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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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// 抽象的笔记小部件提供者类，继承自AppWidgetProvider，用于管理笔记小部件的更新和删除
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public abstract class NoteWidgetProvider extends AppWidgetProvider {
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// 查询笔记小部件信息的投影，包括ID、背景颜色ID和片段
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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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// 投影中ID列的索引
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public static final int COLUMN_ID = 0;
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// 投影中背景颜色ID列的索引
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public static final int COLUMN_BG_COLOR_ID = 1;
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// 投影中片段列的索引
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public static final int COLUMN_SNIPPET = 2;
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private static final String TAG = "NoteWidgetProvider";
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// 当小部件被删除时调用，用于更新数据库中与小部件相关的笔记信息
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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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// 获取指定小部件ID的笔记小部件信息的方法
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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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// 更新小部件的方法，可被子类调用，默认调用带隐私模式参数的更新方法，传入false
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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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// 实际的更新小部件方法，根据小部件ID更新小部件的显示内容和点击事件
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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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// 获取默认背景颜色ID
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int bgId = ResourceParser.getDefaultBgId(context);
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String snippet = "";
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// 创建点击小部件时启动的意图，默认为启动NoteEditActivity
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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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// 获取小部件对应的笔记信息
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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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// 创建远程视图，用于更新小部件的UI
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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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// 根据隐私模式设置不同的文本和点击意图
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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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// 更新小部件
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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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// 抽象方法，用于获取背景资源ID，由子类实现
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protected abstract int getBgResourceId(int bgId);
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// 抽象方法，用于获取布局ID，由子类实现
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protected abstract int getLayoutId();
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// 抽象方法，用于获取小部件类型，由子类实现
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protected abstract int getWidgetType();
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}
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