2011.09.26（6）——— android sample之Notepad(LiveFolder)

2011.09.26（6）——— android sample之Notepad(LiveFolder)

参考：http://zhangkun716717-126-com.iteye.com/blog/813059

这个相对简单点 先看下notepad的源码：

/*
 * Copyright (C) 2009 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 com.example.android.notepad;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.provider.LiveFolders;

public class NotesLiveFolder extends Activity {
    /**
     * The URI for the Notes Live Folder content provider.
     */
    public static final Uri CONTENT_URI = Uri.parse("content://"
            + NotePad.AUTHORITY + "/live_folders/notes");

    public static final Uri NOTE_URI = Uri.parse("content://"
            + NotePad.AUTHORITY + "/notes/#");

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        final Intent intent = getIntent();
        final String action = intent.getAction();

        if (LiveFolders.ACTION_CREATE_LIVE_FOLDER.equals(action)) {
            // Build the live folder intent.
            final Intent liveFolderIntent = new Intent();

            liveFolderIntent.setData(CONTENT_URI);
            liveFolderIntent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_NAME,
                    getString(R.string.live_folder_name));
            liveFolderIntent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_ICON,
                    Intent.ShortcutIconResource.fromContext(this,
                            R.drawable.live_folder_notes));
//            liveFolderIntent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_DISPLAY_MODE,
//                    LiveFolders.DISPLAY_MODE_LIST);
            liveFolderIntent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_DISPLAY_MODE,
            		LiveFolders.DISPLAY_MODE_GRID);
            liveFolderIntent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_BASE_INTENT,
                    new Intent(Intent.ACTION_EDIT, NOTE_URI));

            // The result of this activity should be a live folder intent.
            setResult(RESULT_OK, liveFolderIntent);
        } else {
            setResult(RESULT_CANCELED);
        }

        finish();
    }
}

然后androidmanifest.xml

<activity android:name="NotesLiveFolder" android:label="@string/live_folder_name"
            android:icon="@drawable/live_folder_notes">
            <intent-filter>
                <action android:name="android.intent.action.CREATE_LIVE_FOLDER" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>

然后 长按launcher 选"择文件夹" 效果就是



点击notes




然后 打开





参数讲解：



DISPLAY_MODE有两种，其值为1时，以栅格（Grid）形式显示展开后的实时文件夹内容，为2时则是以列表（List）形式显示

要说明的是android.intent.extra.livefolder.BASE_INTENT这一附加信息，
它的值是一个Intent对象。
在用户单击展开实时文件夹后的选项时，首先该Intent对象的Data中的URI会附加上所点选项的ID，然后传入Launcher调用的startActivity方法中以启动所期望的Activity。
我们baseintent为content://com.google.provider.NotePad/notes/
然后 当我们点击了ID为2的选项 启动的uri就是content://com.google.provider.NotePad/notes/2