如何使通知意图恢复而不是制作新意图? [英] How to make notification intent resume rather than making a new intent?

问题描述

我这里有一个简单的 webview 活动，加载时它会自动显示正在进行的通知.这个想法是人们可以离开这个活动并通过下拉下拉菜单并选择它从他们想要的任何屏幕快速再次访问它.然后，当他们想要时，他们可以通过点击菜单按钮并点击退出来关闭通知，然后通知就会清除.这一切正常.但是，当按下通知时，它会启动一个新的 Activity 实例.我需要更改什么才能查看活动是否尚未被销毁，我可以只调用该实例(恢复它)，因此不需要再次加载它，也不需要将另一个活动添加到我的堆栈中.有任何想法吗?任何帮助将不胜感激.

What i have here is a simple webview activity that when loaded it auto displays an ongoing notification. The idea is that people can navigate away from this activity and quickly access it again from any screen they want by pulling down the drop down menu and selecting it. Then when they want they can just close the notification by hitting the menu button and hitting exit and then the notification clears. This all works fine. However, when the notification is pressed it starts a new instance of the activity. What would i have to change to make it see if the activity has not already been destroyed and i can just call that instance back(resume it) and therefore not needing to load it again and won't need to add another activity to my stack. Any ideas? Any help would be greatly appreciated.

package com.my.app;

import com.flurry.android.FlurryAgent;

import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent; 
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.webkit.CookieSyncManager;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;

public class Chat extends Activity { 
    private ProgressDialog progressBar;
    public WebView webview;
    private static final String TAG = "Main";

    private NotificationManager mNotificationManager;
    private int SIMPLE_NOTFICATION_ID;

    @Override
    public void onStart() {
       super.onStart();
       CookieSyncManager.getInstance().sync();
       FlurryAgent.onStartSession(this, "H9QGMRC46IPXB43GYWU1");
    }

    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState);
        setContentView(R.layout.chat);

        mNotificationManager = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);

        final Notification notifyDetails = new Notification(R.drawable.chat_notification,"Chat Started",System.currentTimeMillis());

        notifyDetails.flags |= Notification.FLAG_ONGOING_EVENT;

        Context context = getApplicationContext();

        CharSequence contentTitle = "Chat";
        CharSequence contentText = "Press to return to chat";

        Intent notifyIntent = new Intent(context, Chat.class);

        PendingIntent intent =
        PendingIntent.getActivity(Chat.this, 0,
        notifyIntent, android.content.Intent.FLAG_ACTIVITY_NEW_TASK);
        notifyDetails.setLatestEventInfo(context, contentTitle, contentText, intent);

        mNotificationManager.notify(SIMPLE_NOTFICATION_ID, notifyDetails);

        CookieSyncManager.createInstance(this);
        CookieSyncManager.getInstance().startSync();
        webview = (WebView) findViewById(R.id.webviewchat);
        webview.setWebViewClient(new chatClient());
        webview.getSettings().setJavaScriptEnabled(true);
        webview.getSettings().setPluginsEnabled(true);
        webview.loadUrl("http://google.com");

        progressBar = ProgressDialog.show(Chat.this, "", "Loading Chat...");  
    }

    private class chatClient extends WebViewClient { 
        @Override 
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            Log.i(TAG, "Processing webview url click...");
            view.loadUrl(url);
            return true;
        }

        public void onPageFinished(WebView view, String url) {
            Log.i(TAG, "Finished loading URL: " +url);
            if (progressBar.isShowing()) {
                progressBar.dismiss();
            }
        }
    }

    public boolean onKeyDown(int keyCode, KeyEvent event) { 
        if ((keyCode == KeyEvent.KEYCODE_BACK) && webview.canGoBack()) { 
            webview.goBack(); 
            return true; 
        }
        return super.onKeyDown(keyCode, event); 
    }

    @Override
    public boolean onCreateOptionsMenu (Menu menu) {
        super.onCreateOptionsMenu(menu);
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.chatmenu, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected (MenuItem item) {
        switch (item.getItemId()) {
            case R.id.home:
                Intent a = new Intent(this, Home.class);
                startActivity(a);
                return true;
            case R.id.closechat:
                mNotificationManager.cancel(SIMPLE_NOTFICATION_ID);
                Intent v = new Intent(this, Home.class);
                startActivity(v);
                return true;
        }
        return false;
    }

    public void onStop() {
       super.onStop();
       CookieSyncManager.getInstance().sync();
       FlurryAgent.onEndSession(this);
    }
}

@Commonsware

@Commonsware

只是为了确定我的意思是正确的，这就是你的建议吗?

Just to be sure i have it correct, is this what you were suggesting?

我有点担心这条线，

PendingIntent.getActivity(Chat.this, 0, notifyIntent, SIMPLE_NOTFICATION_ID);

public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState);
    setContentView(R.layout.chat);

    mNotificationManager = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);

    final Notification notifyDetails = new Notification(R.drawable.chat_notification,"Chat Started",System.currentTimeMillis());

    notifyDetails.flags |= Notification.FLAG_ONGOING_EVENT;


    Context context = getApplicationContext();

    CharSequence contentTitle = "Chat";
    CharSequence contentText = "Press to return to chat";

    Intent notifyIntent = new Intent(context, Chat.class);

    PendingIntent intent =
    PendingIntent.getActivity(Chat.this, 0, notifyIntent, SIMPLE_NOTFICATION_ID);
    notifyDetails.setLatestEventInfo(context, contentTitle, contentText, intent);
    notifyIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);

    mNotificationManager.notify(SIMPLE_NOTFICATION_ID, notifyDetails);


    CookieSyncManager.createInstance(this);
    CookieSyncManager.getInstance().startSync();
    webview = (WebView) findViewById(R.id.webviewchat);
    webview.setWebViewClient(new chatClient());
    webview.getSettings().setJavaScriptEnabled(true);
    webview.getSettings().setPluginsEnabled(true);
    webview.loadUrl("http://google.com");

    progressBar = ProgressDialog.show(Chat.this, "", "Loading Chat...");        
}

推荐答案

这个想法是人们可以导航远离这项活动并迅速从他们的任何屏幕再次访问它想要通过下拉下拉菜单菜单并选择它.

The idea is that people can navigate away from this activity and quickly access it again from any screen they want by pulling down the drop down menu and selecting it.

请将此选项设为可选.

但是，当通知是按下它开始一个新的实例活动.

However, when the notification is pressed it starts a new instance of the activity.

默认情况下会发生这种情况.

That will happen by default.

我需要改变什么才能做到查看活动是否还没有被摧毁了，我可以打电话该实例返回(恢复它)和因此不需要再次加载它并且不需要添加另一个活动到我的堆栈.

What would i have to change to make it see if the activity has not already been destroyed and i can just call that instance back(resume it) and therefore not needing to load it again and won't need to add another activity to my stack.

摆脱FLAG_ACTIVITY_NEW_TASK.添加 notifyIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP); -- 见 这个示例项目.

Get rid of FLAG_ACTIVITY_NEW_TASK. Add notifyIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP); -- see this sample project.

Context context = getApplicationContext();

请不要这样做.只需将您的 Activity 用作 Context.

Please don't do this. Just use your Activity as a Context.

这篇关于如何使通知意图恢复而不是制作新意图?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！