堆棧內存溢出
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使用Eddystone信標在Android狀態欄中顯示通知

[英]Use Eddystone Beacon to Show notification in Android Status Bar

 原文  2016-01-29 07:13:56  1   1    java/ android/ android-notifications/ altbeacon/ android-statusbar

問題描述

我已經能夠成功創建一個應用程序（感謝davidgyoung！），該應用程序在后台監視信標，然后在后台打開該應用程序。

現在，我希望我的應用程序首先在狀態欄中顯示提示，提示您“我已檢測到信標！您想打開應用程序嗎？”。 然后，用戶將單擊通知以打開或關閉該應用，然后忽略該通知。

我已經在堆棧溢出中搜索了類似的內容，但是在找到與信標相關的內容方面並沒有取得太大的成功。 我確實找到了有關添加StatusBar通知的頁面，但沒有取得太大的成功。

特別是在我的BeaconReferenceApplication.java和MonitoringActivity.java文件中。 我認為我將代碼放置在正確的位置（在didEnterRegion之后），但是我還有諸如notificationButton ， setLatestEventInfo等區域的未解析類。有人可以幫忙嗎？ 提前致謝！

BeaconReferenceApplication.java： 

import android.app.Application;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.TaskStackBuilder;
import android.content.Context;
import android.content.Intent;
import android.support.v4.app.NotificationCompat;
import android.util.Log;

import org.altbeacon.beacon.BeaconManager;
import org.altbeacon.beacon.BeaconParser;
import org.altbeacon.beacon.Identifier;
import org.altbeacon.beacon.Region;
import org.altbeacon.beacon.powersave.BackgroundPowerSaver;
import org.altbeacon.beacon.startup.RegionBootstrap;
import org.altbeacon.beacon.startup.BootstrapNotifier;

public class BeaconReferenceApplication extends Application implements BootstrapNotifier {
    private static final String TAG = "BeaconReferenceApp";
    private RegionBootstrap regionBootstrap;
    private BackgroundPowerSaver backgroundPowerSaver;
    private boolean haveDetectedBeaconsSinceBoot = false;
    private MonitoringActivity monitoringActivity = null;


    public void onCreate() {
        super.onCreate();
        BeaconManager beaconManager = org.altbeacon.beacon.BeaconManager.getInstanceForApplication(this);

        // By default the AndroidBeaconLibrary will only find AltBeacons.  If you wish to make it
        // find a different type of beacon, you must specify the byte layout for that beacon's
        // advertisement with a line like below.  The example shows how to find a beacon with the
        // same byte layout as AltBeacon but with a beaconTypeCode of 0xaabb.  To find the proper
        // layout expression for other beacon types, do a web search for "setBeaconLayout"
        // including the quotes.
        //
        beaconManager.getBeaconParsers().clear();
        beaconManager.getBeaconParsers().add(new BeaconParser().
                setBeaconLayout("s:0-1=feaa,m:2-2=00,p:3-3:-41,i:4-13,i:14-19"));

        Log.d(TAG, "setting up background monitoring for beacons and power saving");
        // wake up the app when a beacon is seen
        Region region = new Region("backgroundRegion", Identifier.parse("2F234454F4911BA9FFA6"), null, null);
        regionBootstrap = new RegionBootstrap(this, region);

        // simply constructing this class and holding a reference to it in your custom Application
        // class will automatically cause the BeaconLibrary to save battery whenever the application
        // is not visible.  This reduces bluetooth power usage by about 60%
        backgroundPowerSaver = new BackgroundPowerSaver(this);

        // If you wish to test beacon detection in the Android Emulator, you can use code like this:
        // BeaconManager.setBeaconSimulator(new TimedBeaconSimulator() );
        // ((TimedBeaconSimulator) BeaconManager.getBeaconSimulator()).createTimedSimulatedBeacons();
    }

    @Override
    public void didEnterRegion(Region arg0) {
        // In this example, this class sends a notification to the user whenever a Beacon
        // matching a Region (defined above) are first seen.
        Log.d(TAG, "did enter region.");
        if (!haveDetectedBeaconsSinceBoot) {
            Log.d(TAG, "sending notification to StatusBar");
            @SuppressWarnings("deprecation")
            private void Notify(String notificationTitle, String notificationMessage) {
                NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
                @SuppressWarnings("deprecation")
                Notification notification = new Notification(R.mipmap.ic_launcher,
                        "New Message", System.currentTimeMillis());

                Intent notificationIntent = new Intent(this, MonitoringActivity.class);
                PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
                        notificationIntent, 0);

                notification.setLatestEventInfo(MonitoringActivity.this, notificationTitle,
                        notificationMessage, pendingIntent);
                notificationManager.notify(9999, notification);
            }

        }
        } else {
            if (monitoringActivity != null) {
                Log.d(TAG, "auto launching MainActivity");

                // The very first time since boot that we detect an beacon, we launch the
                // MainActivity
                Intent intent = new Intent(this, MonitoringActivity.class);
                intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                // Important:  make sure to add android:launchMode="singleInstance" in the manifest
                // to keep multiple copies of this activity from getting created if the user has
                // already manually launched the app.
                this.startActivity(intent);
                haveDetectedBeaconsSinceBoot = true;
            }
        }
    }

    @Override
    public void didExitRegion(Region region) {
        if (monitoringActivity != null) {
            Log.d(TAG,"I no longer see a beacon.");
        }
    }

    @Override
    public void didDetermineStateForRegion(int state, Region region) {
        if (monitoringActivity != null) {
            Log.d(TAG,"I have just switched from seeing/not seeing beacons: " + state);
        }
    }

    private void sendNotification() {
        NotificationCompat.Builder builder =
                new NotificationCompat.Builder(this)
                        .setContentTitle("Beacon Reference Application")
                        .setContentText("An beacon is nearby.")
                        .setSmallIcon(R.mipmap.ic_launcher);

        TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
        stackBuilder.addNextIntent(new Intent(this, MonitoringActivity.class));
        PendingIntent resultPendingIntent =
                stackBuilder.getPendingIntent(
                        0,
                        PendingIntent.FLAG_UPDATE_CURRENT
                );
        builder.setContentIntent(resultPendingIntent);
        NotificationManager notificationManager =
                (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(1, builder.build());
    }

    public void setMonitoringActivity(MonitoringActivity activity) {
        this.monitoringActivity = activity;
    }

}

MonitoringActivity.java： 

import android.Manifest;
import android.annotation.SuppressLint;
import android.annotation.TargetApi;

import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.os.Build;
import android.os.Bundle;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.util.Log;
import android.view.View;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;

import org.altbeacon.beacon.BeaconManager;

public class MonitoringActivity extends Activity  {
    protected static final String TAG = "MonitoringActivity";
    private static final int PERMISSION_REQUEST_COARSE_LOCATION = 1;

    private WebView mWebView;
    ProgressBar progressBar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        Log.d(TAG, "onCreate");
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_monitoring);

        // code for button notification
        Button notificationButton = (Button) findViewById(R.id.notificationButton);

        notificationButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Notify("Title: Meeting with Business",
                        "Msg:Pittsburg 10:00 AM EST ");
            }
        });

        // code for button notification

        mWebView = (WebView) findViewById(R.id.activity_main_webview);
        progressBar = (ProgressBar) findViewById(R.id.progressBar1);
        WebSettings webSettings = mWebView.getSettings();
        webSettings.setJavaScriptEnabled(true);
        mWebView.loadUrl("http://communionchapelefca.org/edy-home");
        mWebView.setWebViewClient(new MyAppWebViewClient());

        verifyBluetooth();
        Log.d(TAG, "Application just launched");

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            // Android M Permission check
            if (this.checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                final AlertDialog.Builder builder = new AlertDialog.Builder(this);
                builder.setTitle("This app needs location access");
                builder.setMessage("Please grant location access so this app can detect beacons in the background.");
                builder.setPositiveButton(android.R.string.ok, null);
                builder.setOnDismissListener(new DialogInterface.OnDismissListener() {

                    @TargetApi(23)
                    @Override
                    public void onDismiss(DialogInterface dialog) {
                        requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION},
                                PERMISSION_REQUEST_COARSE_LOCATION);
                    }

                });
                builder.show();
            }
        }
    }

    private class HelloWebViewClient extends WebViewClient{


        @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon) {
            // TODO Auto-generated method stub
            super.onPageStarted(view, url, favicon);
        }

        @Override
        public boolean shouldOverrideUrlLoading(WebView webView, String url)
        {
            webView.loadUrl(url);
            return true;
        }

        @Override
        public void onPageFinished(WebView view, String url) {
            // TODO Auto-generated method stub
            super.onPageFinished(view, url);

            progressBar.setVisibility(view.GONE);
        }

    }

    @Override
    public void onBackPressed() {
        if(mWebView.canGoBack()) {
            mWebView.goBack();
        } else {
            super.onBackPressed();
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode,
                                           String permissions[], int[] grantResults) {
        switch (requestCode) {
            case PERMISSION_REQUEST_COARSE_LOCATION: {
                if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    Log.d(TAG, "coarse location permission granted");
                } else {
                    final AlertDialog.Builder builder = new AlertDialog.Builder(this);
                    builder.setTitle("Functionality limited");
                    builder.setMessage("Since location access has not been granted, this app will not be able to discover beacons when in the background.");
                    builder.setPositiveButton(android.R.string.ok, null);
                    builder.setOnDismissListener(new DialogInterface.OnDismissListener() {

                        @Override
                        public void onDismiss(DialogInterface dialog) {
                        }

                    });
                    builder.show();
                }
                return;
            }
        }
    }

    public void onRangingClicked(View view) {
        Intent myIntent = new Intent(this, RangingActivity.class);
        this.startActivity(myIntent);
    }

    @Override
    public void onResume() {
        super.onResume();
        ((BeaconReferenceApplication) this.getApplicationContext()).setMonitoringActivity(this);
    }

    @Override
    public void onPause() {
        super.onPause();
        ((BeaconReferenceApplication) this.getApplicationContext()).setMonitoringActivity(null);
    }

    private void verifyBluetooth() {

        try {
            if (!BeaconManager.getInstanceForApplication(this).checkAvailability()) {
                final AlertDialog.Builder builder = new AlertDialog.Builder(this);
                builder.setTitle("Bluetooth not enabled");
                builder.setMessage("Please enable bluetooth in settings and restart this application.");
                builder.setPositiveButton(android.R.string.ok, null);
                builder.setOnDismissListener(new DialogInterface.OnDismissListener() {
                    @Override
                    public void onDismiss(DialogInterface dialog) {
                        finish();
                        System.exit(0);
                    }
                });
                builder.show();
            }
        }
        catch (RuntimeException e) {
            final AlertDialog.Builder builder = new AlertDialog.Builder(this);
            builder.setTitle("Bluetooth LE not available");
            builder.setMessage("Sorry, this device does not support Bluetooth LE.");
            builder.setPositiveButton(android.R.string.ok, null);
            builder.setOnDismissListener(new DialogInterface.OnDismissListener() {

                @Override
                public void onDismiss(DialogInterface dialog) {
                    finish();
                    System.exit(0);
                }

            });
            builder.show();

        }

    }



}

1 個解決方案

解決方案1
 0  2016-01-30 04:59:59

因此，我可以使用Android開發者網站上的Notifications示例解決問題。 我使用了他們的示例代碼，將其修改為適合自己的用法，然后進一步使用.bigText使通知看起來很棒。 感謝他們和daviggyoung使我的應用程序正常運行。 謝謝！

我也不需要像我先前發布的那樣編輯我的MonitoringActivity.java。

最終的BeaconReferenceApplication.java： 

import android.app.Application;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.TaskStackBuilder;
import android.content.Context;
import android.content.Intent;
import android.support.v4.app.NotificationCompat;
import android.util.Log;
import android.widget.RemoteViews;

import org.altbeacon.beacon.BeaconManager;
import org.altbeacon.beacon.BeaconParser;
import org.altbeacon.beacon.Identifier;
import org.altbeacon.beacon.Region;
import org.altbeacon.beacon.powersave.BackgroundPowerSaver;
import org.altbeacon.beacon.startup.RegionBootstrap;
import org.altbeacon.beacon.startup.BootstrapNotifier;

public class BeaconReferenceApplication extends Application implements BootstrapNotifier {
    private static final String TAG = "BeaconReferenceApp";
    private RegionBootstrap regionBootstrap;
    private BackgroundPowerSaver backgroundPowerSaver;
    private boolean haveDetectedBeaconsSinceBoot = false;
    private MonitoringActivity monitoringActivity = null;


    public void onCreate() {
        super.onCreate();
        BeaconManager beaconManager = org.altbeacon.beacon.BeaconManager.getInstanceForApplication(this);

        // By default the AndroidBeaconLibrary will only find AltBeacons.  If you wish to make it
        // find a different type of beacon, you must specify the byte layout for that beacon's
        // advertisement with a line like below.  The example shows how to find a beacon with the
        // same byte layout as AltBeacon but with a beaconTypeCode of 0xaabb.  To find the proper
        // layout expression for other beacon types, do a web search for "setBeaconLayout"
        // including the quotes.
        //
        beaconManager.getBeaconParsers().clear();
        beaconManager.getBeaconParsers().add(new BeaconParser().
                setBeaconLayout("s:0-1=feaa,m:2-2=00,p:3-3:-41,i:4-13,i:14-19"));

        Log.d(TAG, "setting up background monitoring for beacons and power saving");
        // wake up the app when a beacon is seen
        Region region = new Region("backgroundRegion", Identifier.parse("2F234454F4911BA9FFA6"), null, null);
        regionBootstrap = new RegionBootstrap(this, region);

        // simply constructing this class and holding a reference to it in your custom Application
        // class will automatically cause the BeaconLibrary to save battery whenever the application
        // is not visible.  This reduces bluetooth power usage by about 60%
        backgroundPowerSaver = new BackgroundPowerSaver(this);

        // If you wish to test beacon detection in the Android Emulator, you can use code like this:
        // BeaconManager.setBeaconSimulator(new TimedBeaconSimulator() );
        // ((TimedBeaconSimulator) BeaconManager.getBeaconSimulator()).createTimedSimulatedBeacons();
    }

    @Override
    public void didEnterRegion(Region arg0) {
        // In this example, this class sends a notification to the user whenever a Beacon
        // matching a Region (defined above) are first seen.
        Log.d(TAG, "did enter region.");
        if (!haveDetectedBeaconsSinceBoot) {
            Log.d(TAG, "sending notification to StatusBar");
            //begin code for notification
            NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this)
                            .setSmallIcon(R.drawable.notification_icon)
                            .setContentTitle("Message from Communion Chapel")
                            .setContentText("Welcome! Thanks for coming!")
                            .setStyle(new NotificationCompat.BigTextStyle()
                            .bigText("We noticed that you're here today, click here to open the app and get today's Sermon Notes and Bulletin."))
                            .setAutoCancel(true);
            ;

// Creates an explicit intent for an Activity in your app
            Intent resultIntent = new Intent(this, MonitoringActivity.class);

// The stack builder object will contain an artificial back stack for the
// started Activity.
// This ensures that navigating backward from the Activity leads out of
// your application to the Home screen.
            TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
// Adds the back stack for the Intent (but not the Intent itself)
            stackBuilder.addParentStack(MonitoringActivity.class);
// Adds the Intent that starts the Activity to the top of the stack
            stackBuilder.addNextIntent(resultIntent);
            PendingIntent resultPendingIntent =
                    stackBuilder.getPendingIntent(
                            0,
                            PendingIntent.FLAG_UPDATE_CURRENT
                    );
            mBuilder.setContentIntent(resultPendingIntent);
            NotificationManager mNotificationManager =
                    (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
// mId allows you to update the notification later on.
            mNotificationManager.notify(123, mBuilder.build());
        }
    }

    @Override
    public void didExitRegion(Region region) {
        if (monitoringActivity != null) {
            Log.d(TAG,"I no longer see a beacon.");
        }
    }

    @Override
    public void didDetermineStateForRegion(int state, Region region) {
        if (monitoringActivity != null) {
            Log.d(TAG,"I have just switched from seeing/not seeing beacons: " + state);
        }
    }

    private void sendNotification() {
        NotificationCompat.Builder builder =
                new NotificationCompat.Builder(this)
                        .setContentTitle("Beacon Reference Application")
                        .setContentText("A beacon is nearby.")
                        .setSmallIcon(R.drawable.app_icon);

        TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
        stackBuilder.addNextIntent(new Intent(this, MonitoringActivity.class));
        PendingIntent resultPendingIntent =
                stackBuilder.getPendingIntent(
                        0,
                        PendingIntent.FLAG_UPDATE_CURRENT
                );
        builder.setContentIntent(resultPendingIntent);
        NotificationManager notificationManager =
                (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(1, builder.build());
    }

    public void setMonitoringActivity(MonitoringActivity activity) {
        this.monitoringActivity = activity;
    }

}

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