Android4.4 SystemUI加入Dialog弹窗

此弹窗为开机SystemUI的显示弹窗：

首先。在SystemUI的源代码文件夹加入源代码类文件，文件夹为frameworks/base/packages/SystemUI/src/com/android/systemui/settings，类名暂取为UpdateUI.java内容例如以下：

/*

 * Copyright (C) 2008 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.android.systemui.settings;



import android.app.ActivityManager;

import android.app.ActivityManager.RunningTaskInfo;

import android.app.AlertDialog;

import android.app.Dialog;

import android.app.XXDialog;

import android.content.BroadcastReceiver;

import android.content.ComponentName;

import android.content.ContentResolver;

import android.content.SharedPreferences;

import android.content.SharedPreferences.Editor;

import android.content.Context;

import android.content.DialogInterface;

import android.content.DialogInterface.OnDismissListener;

import android.content.Intent;

import android.content.IntentFilter;

import android.net.Uri;

import android.os.UserHandle;

import android.provider.Settings;

import android.util.Slog;

import android.view.View;

import android.view.MotionEvent;

import android.view.WindowManager;

import android.widget.Button;

import android.widget.TextView;



import com.android.systemui.R;

import com.android.systemui.SystemUI;

import android.app.XXDialog.ButtonClickListener;



import java.io.FileDescriptor;

import java.io.PrintWriter;

import java.util.Arrays;

import java.util.List;



public class UpdateUI extends SystemUI {

    static final String TAG = "UpdateUI";

    static final String ACTION = "android.hm.WITH_UPGRADE_ICON";

    static final String sourceFlag = "from_check_service";

    static final String forceFlag = "force";

    static final String Update = "com.XX.ota.MainActivity";



    private static boolean fromService = false;

    private static boolean forceUpdate = false;

    private String vers;



    private SharedPreferences sp;

    XXDialog mUpdateDialog;

    TextView mUpdateTextView;



    private long mScreenOffTime = -1;



    public void start() {

        // Register for Intent broadcasts for...

        IntentFilter filter = new IntentFilter();

        filter.addAction(ACTION);

        mContext.registerReceiver(mIntentReceiver, filter, null, null);

    }



    private boolean shouldShow(final String str) {

//此处处理广播过来的数据字段，如若与已存在xml的数据同样，则不再提示弹窗，否则弹窗并更新xml数据。

sp = mContext.getSharedPreferences("version", Context.MODE_PRIVATE);

        String version = sp.getString("version", "");

        if (!str.equals(version)) {

            Editor ed = sp.edit();

            ed.putString("version", vers);

            ed.commit();



            return true;

        }



        return false;

    }



    private boolean getTopWindow() {

        ActivityManager am = (ActivityManager)(mContext).getSystemService(Context.ACTIVITY_SERVICE);

        ComponentName cn = am.getRunningTasks(1).get(0).topActivity;

        Slog.e(TAG, "activity: " + cn.getClassName().toString());

        if (cn.getClassName().contains(Update))

            return true;

            

        return false;

    }



    private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {

        @Override

        public void onReceive(Context context, Intent intent) {

            String action = intent.getAction();

            if (action.equals(ACTION)) {

                fromService = intent.getBooleanExtra(sourceFlag, false);

                forceUpdate = intent.getBooleanExtra(forceFlag, false);

                vers = intent.getStringExtra("version");

                if (fromService && !getTopWindow()) {

                    if (forceUpdate) {

                        showUpdateDialog(forceUpdate);

                        return;

                    } else if (shouldShow(vers)) {

                        showUpdateDialog(forceUpdate);

                        return;

                    }

                }

            }

        }

    };



    void dismissUpdateDialog() {

        if (mUpdateDialog != null) {

            mUpdateDialog.dismiss();

            mUpdateDialog = null;

        }

    }



    void showUpdateDialog(final boolean bool) {

        Slog.e(TAG, "==== show update dialog ====");

//此Dialog为第三方加入的于framework的标准dialog，在android.app.XXDialog中。

XXDialog.Builder b = new XXDialog.Builder(mContext);

        XXDialog dialog = b.create();

        dialog.setRightButtonName(mContext.getString(R.string.sure));

        dialog.setLeftButtonName(mContext.getString(R.string.cancel));

        dialog.setContent(mContext.getString(R.string.update_notice));

        dialog.setTitle(mContext.getString(R.string.system_update));

        dialog.notCloseOnTouch();

        if (bool) {

            dialog.setLeftButtonVisible(false);

            dialog.setMiddleLineVisible(false);

        }



        final Intent intent = new Intent();

        ComponentName comp = new ComponentName("com.XX.ota",

                "com.XX.ota.MainActivity");

        intent.setComponent(comp);

        intent.setAction("android.intent.action.VIEW");

        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

        if (intent.resolveActivity(mContext.getPackageManager()) != null) {

            dialog.setClickListener(new ButtonClickListener(){

                

                @Override

                public void rightClick() {

                    mContext.startActivityAsUser(intent, UserHandle.CURRENT);

                    dismissUpdateDialog();

                }

                

                @Override

                public void leftClick() {

                    if (!bool)

                        dismissUpdateDialog();

                }

            });

        }



        dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);

        dialog.getWindow().getAttributes().privateFlags |=

                WindowManager.LayoutParams.PRIVATE_FLAG_SHOW_FOR_ALL_USERS;

        dialog.show();

        mUpdateDialog = dialog;

    }



}

而后。将该类加入至SystemUI开机启动的service类名列表中：

改动文件frameworks/base/packages/SystemUI/src/com/android/systemui/SystemUIService.java

private final Class<?>[] SERVICES = new Class[] {

            com.android.systemui.recent.Recents.class,

            com.android.systemui.statusbar.SystemBars.class,

            com.android.systemui.usb.StorageNotification.class,

            com.android.systemui.power.PowerUI.class,

            com.android.systemui.media.RingtonePlayer.class,

            com.android.systemui.settings.SettingsUI.class,

            com.android.systemui.settings.UpdateUI.class,

            com.android.systemui.net.NetWorkWarningUI.class,

        };

至此。加入完成。。

。