Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * The MIT License
 *
 * Copyright 2014 Kiyofumi Kondoh
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

import android.app.backup.BackupManager;

import android.content.Context;

import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.util.Log;

public class Main {
    private static final String TAG = "kk-Backup-Helper";
    private static final String ANDROID_BACKUP_APIKEY = "com.google.android.backup.api_key";
    private static Context mContext = null;
    private static BackupManager mBM = null;

    public static synchronized void initialize(final Context context) {
        mContext = context;
        mBM = new BackupManager(context);

        checkBackupApiKey();
        checkBackupAgent();

    }

    private static void checkBackupApiKey() {
        if (null == mContext) {
            return;
        }

        boolean haveBackupApiKey = false;
        {
            final ApplicationInfo appInfo = mContext.getApplicationInfo();
            if (null != appInfo) {
                if (null != appInfo.metaData) {
                    if (appInfo.metaData.containsKey(ANDROID_BACKUP_APIKEY)) {
                        final String backupApiKey = appInfo.metaData.getString(ANDROID_BACKUP_APIKEY);
                        Log.d(TAG, "backupApiKey from Context=" + backupApiKey);
                        haveBackupApiKey = true;
                    } else {
                        Log.d(TAG, "metaData from Context not contain key=" + ANDROID_BACKUP_APIKEY);
                    }
                }
            }
        }

        if (false == haveBackupApiKey) {
            final ApplicationInfo appInfoFromPM = getApplicationInfoFromPackageManager(
                    PackageManager.GET_META_DATA);
            if (null != appInfoFromPM) {
                Log.d(TAG, "metaData from PakcageManager=" + appInfoFromPM.metaData);
                if (null != appInfoFromPM.metaData) {
                    if (appInfoFromPM.metaData.containsKey(ANDROID_BACKUP_APIKEY)) {
                        final String backupApiKey = appInfoFromPM.metaData.getString(ANDROID_BACKUP_APIKEY);
                        Log.d(TAG, "backupApiKey from PackageManager=" + backupApiKey);
                        haveBackupApiKey = true;
                    } else {
                        Log.d(TAG, "metaData from PackageManager not contain key=" + ANDROID_BACKUP_APIKEY);
                    }
                }
            }

        }

        if (false == haveBackupApiKey) {
            Log.e(TAG, "AndroidManifest.xml doesn't contain\n" + "<application><meta-data android:name=\""
                    + ANDROID_BACKUP_APIKEY + "\" android:value=\"xxxxxx\" /></application>");
            Log.e(TAG, "register url http://code.google.com/android/backup/signup.html");
        }

    }

    private static void checkBackupAgent() {
        if (null == mContext) {
            return;
        }

        boolean haveBackupAgent = false;
        {
            final ApplicationInfo appInfo = mContext.getApplicationInfo();
            final String backupAgentName = appInfo.backupAgentName; /* API-8 */
            Log.d(TAG, "backupAgentName=" + backupAgentName);
            if (null != appInfo.backupAgentName) {
                {
                    Class<?> clazz = null;
                    try {
                        clazz = Class.forName(appInfo.backupAgentName);
                        haveBackupAgent = true;
                    } catch (ClassNotFoundException ex) {
                        Log.d(TAG, "" + ex);
                    }
                    if (false == haveBackupAgent) {
                        try {
                            if (appInfo.backupAgentName.startsWith(".")) {
                                clazz = Class.forName(appInfo.packageName + appInfo.backupAgentName);
                            } else {
                                clazz = Class.forName(appInfo.packageName + "." + appInfo.backupAgentName);
                            }
                            haveBackupAgent = true;
                        } catch (ClassNotFoundException ex) {
                            Log.d(TAG, "" + ex);
                        }
                    }
                }
            }
        }

        if (false == haveBackupAgent) {
            final ApplicationInfo appInfoFromPM = getApplicationInfoFromPackageManager(0);
            if (null != appInfoFromPM) {
                Log.d(TAG, "backupAgentName from PackageManager=" + appInfoFromPM.backupAgentName);
                if (null != appInfoFromPM.backupAgentName) {
                    {
                        Class<?> clazz = null;
                        try {
                            clazz = Class.forName(appInfoFromPM.backupAgentName);
                            haveBackupAgent = true;
                        } catch (ClassNotFoundException ex) {
                            Log.d(TAG, "" + ex);
                        }
                        if (false == haveBackupAgent) {
                            try {
                                if (appInfoFromPM.backupAgentName.startsWith(".")) {
                                    clazz = Class
                                            .forName(appInfoFromPM.packageName + appInfoFromPM.backupAgentName);
                                } else {
                                    clazz = Class.forName(
                                            appInfoFromPM.packageName + "." + appInfoFromPM.backupAgentName);
                                }
                                haveBackupAgent = true;
                            } catch (ClassNotFoundException ex) {
                                Log.d(TAG, "" + ex);
                            }
                        }
                    }
                }
            }
        }

        if (false == haveBackupAgent) {
            Log.e(TAG, "AndroidManifest.xml doesn't contain\n" + "<application android:backupAgent=\"xxxxx\"/>\n"
                    + "format of class-name similar to '<application><activity android:name>'");
        }

    }

    private static ApplicationInfo getApplicationInfoFromPackageManager(final int flags) {
        assert null != mContext;

        if (null == mContext) {
            return null;
        }

        final PackageManager pm = mContext.getPackageManager();
        if (null == pm) {
            return null;
        }

        ApplicationInfo appInfo = null;
        try {
            appInfo = pm.getApplicationInfo(mContext.getPackageName(), flags);
        } catch (PackageManager.NameNotFoundException e) {

        }

        return appInfo;
    }
}