我这里有一个简单的 webview 活动,加载时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,当他们需要时,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。这一切都很好。但是,当按下通知时,它会启动一个新的活动实例。我必须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,也不需要向我的堆栈添加另一个活动. 有任何想法吗?任何帮助将不胜感激。
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
只是为了确保我说得对,这是你的建议吗?
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...");
}