我有两个信标，当第一个信标在1米范围内时，我发射了第一个活动，当第二个信标在1米内时，我发射了第二个活动。
现在我想要的是如果第一个活动被激活一次然后应用程序不应该再次启动第一个活动但问题是如果我从第一个活动按回按钮然后第一个活动再次启动，如果第一个信标在1米和我我面临第二个灯塔的同样问题
我的清单文件代码是：
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="org.altbeacon.beaconreference"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="17"
android:targetSdkVersion="21" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
<uses-feature android:name="android.hardware.bluetooth_le" android:required="false"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme"
android:name="org.altbeacon.beaconreference.MyApplicationName">
<activity
android:launchMode="singleInstance"
android:name="org.altbeacon.beaconreference.FirstActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:launchMode="singleInstance"
android:name="org.altbeacon.beaconreference.SecondActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="org.altbeacon.beaconreference.SECONDACTIVITY" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>
我的应用类代码是：
import java.util.Collection;
import android.app.Application;
import android.content.Intent;
import android.os.RemoteException;
import android.util.Log;
import android.widget.Toast;
import org.altbeacon.beacon.powersave.BackgroundPowerSaver;
import org.altbeacon.beacon.startup.BootstrapNotifier;
import org.altbeacon.beacon.startup.RegionBootstrap;
import org.altbeacon.beacon.Beacon;
import org.altbeacon.beacon.BeaconManager;
import org.altbeacon.beacon.BeaconParser;
import org.altbeacon.beacon.RangeNotifier;
import org.altbeacon.beacon.Region;
public class MyApplicationName extends Application implements BootstrapNotifier, RangeNotifier {
private static final String TAG = ".MyApplicationName";
private RegionBootstrap regionBootstrap;
private BeaconManager mBeaconManager;
private Region region;
private Region mAllBeaconsRegion;
private BackgroundPowerSaver mBackgroundPowerSaver;
private RegionBootstrap mRegionBootstrap;
private static final String ESTIMOTE_PROXIMITY_UUID = "XYZ";
@Override
public void onCreate() {
mAllBeaconsRegion = new Region("all beacons",null, null, null);
mBeaconManager = BeaconManager.getInstanceForApplication(this);
mBackgroundPowerSaver = new BackgroundPowerSaver(this);
mRegionBootstrap = new RegionBootstrap(this, mAllBeaconsRegion);
// 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
//
Log.d(TAG, " region. starting ranging");
mBeaconManager.getBeaconParsers().add(new BeaconParser().setBeaconLayout("m:2-3=0215,i:4-19,i:20-21,i:22-23,p:24-24"));
mBeaconManager.setBackgroundScanPeriod(11000l);
mBeaconManager.setBackgroundBetweenScanPeriod(30000l);
}
@Override
public void didDetermineStateForRegion(int arg0, Region arg1) {
// Don't care
}
@Override
public void didEnterRegion(Region arg0) {
//mRegionBootstrap.disable();
try {
//mBeaconManager.startRangingBeaconsInRegion(region);
mBeaconManager.startRangingBeaconsInRegion(mAllBeaconsRegion);
mBeaconManager.setRangeNotifier(this);
} catch (RemoteException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//Toast.makeText(this, "didEnterRegion", Toast.LENGTH_LONG).show();
//Toast.makeText(this, "didEnterRegion", Toast.LENGTH_LONG).show();
Log.d(TAG, "Got a didEnterRegion call");
// This call to disable will make it so the activity below only gets launched the first time a beacon is seen (until the next time the app is launched)
// if you want the Activity to launch every single time beacons come into view, remove this call.
}
@Override
public void didExitRegion(Region arg0) {
// Don't care
}
@Override
public void didRangeBeaconsInRegion(Collection<Beacon> beacons, Region region) {
//mRegionBootstrap.disable();
// TODO Auto-generated method stub
if (beacons.size() > 0) {
for (Beacon beacon: beacons) {
String beconid=beacon.toString();
if(beacon.getDistance()<1 && beconid.equals("id1: b9407f30-f5f8-466e-aff9-25556b57fe6d id2: 20155 id3: 28577"))
{
Log.d(TAG, "within 1 minute call");
Intent intent = new Intent(this, FirstActivity.class);
// IMPORTANT: in the AndroidManifest.xml definition of this activity, you must set android:launchMode="singleInstance" or you will get two instances
// created when a user launches the activity manually and it gets launched from here.
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
this.startActivity(intent);
}
if(beacon.getDistance()<1 && beconid.equals("id1: b9407f30-f5f8-466e-aff9-25556b57fe6d id2: 8128 id3: 59794"))
{
Log.d(TAG, "within 1 minute call");
Intent intent = new Intent(this, SecondActivity.class);
// IMPORTANT: in the AndroidManifest.xml definition of this activity, you must set android:launchMode="singleInstance" or you will get two instances
// created when a user launches the activity manually and it gets launched from here.
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
this.startActivity(intent);
}
}
}
}
}
答案 0 :(得分：0)
您应该在找到信标之后停止查找信标，并且只在重新开始查看某个延迟后重新开始，或者您可以保存找到的最后一个信标的ID并忽略该信标一段时间或直到它超出范围。< / p>
您可以使用以下内容忽略信标60秒：
private String lastBeaconId = "";
private long lastTimeFound = 0;
@Override
public void didRangeBeaconsInRegion(Collection<Beacon> beacons, Region region) {
//mRegionBootstrap.disable();
// TODO Auto-generated method stub
if (beacons.size() > 0) {
for (Beacon beacon: beacons) {
String beconid=beacon.toString();
if (beconid.equals(lastBeaconId)){
long diff = new Date().getTime();
//ignore this beacon if it was found 60 seconds ago
if(diff - lastTimeFound >= 60*1000){
continue;
}
}
if(beacon.getDistance()<1 && beconid.equals("id1: b9407f30-f5f8-466e-aff9-25556b57fe6d id2: 20155 id3: 28577"))
{
//save this beacon
lastTimeFound = new Date().getTime();
lastBeaconId = beconid;
Log.d(TAG, "within 1 minute call");
Intent intent = new Intent(this, FirstActivity.class);
// IMPORTANT: in the AndroidManifest.xml definition of this activity, you must set android:launchMode="singleInstance" or you will get two instances
// created when a user launches the activity manually and it gets launched from here.
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
this.startActivity(intent);
}
if(beacon.getDistance()<1 && beconid.equals("id1: b9407f30-f5f8-466e-aff9-25556b57fe6d id2: 8128 id3: 59794"))
{
//save this beacon
lastTimeFound = new Date().getTime();
lastBeaconId = beconid;
Log.d(TAG, "within 1 minute call");
Intent intent = new Intent(this, SecondActivity.class);
// IMPORTANT: in the AndroidManifest.xml definition of this activity, you must set android:launchMode="singleInstance" or you will get two instances
// created when a user launches the activity manually and it gets launched from here.
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
this.startActivity(intent);
}
}
}
}
答案 1 :(得分：0)
似乎解决这个问题的一个简单方法是存储像这样的布尔标志：
private Boolean firstActivityLaunched = false;
private Boolean secondActivityLaunched = false;
然后更改您的代码以使用它们：
@Override
public void didRangeBeaconsInRegion(Collection<Beacon> beacons, Region region) {
//mRegionBootstrap.disable();
// TODO Auto-generated method stub
if (beacons.size() > 0) {
for (Beacon beacon: beacons) {
String beconid=beacon.toString();
if(beacon.getDistance()<1 && beconid.equals("id1: b9407f30-f5f8-466e-aff9-25556b57fe6d id2: 20155 id3: 28577") && !firstActivityLaunched)
{
firstActivityLaunched = true;
Log.d(TAG, "within 1 minute call");
Intent intent = new Intent(this, FirstActivity.class);
// IMPORTANT: in the AndroidManifest.xml definition of this activity, you must set android:launchMode="singleInstance" or you will get two instances
// created when a user launches the activity manually and it gets launched from here.
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
this.startActivity(intent);
}
if(beacon.getDistance()<1 && beconid.equals("id1: b9407f30-f5f8-466e-aff9-25556b57fe6d id2: 8128 id3: 59794") && !secondActivityLaunched)
{
secondActivityLaunched = true;
Log.d(TAG, "within 1 minute call");
Intent intent = new Intent(this, SecondActivity.class);
// IMPORTANT: in the AndroidManifest.xml definition of this activity, you must set android:launchMode="singleInstance" or you will get two instances
// created when a user launches the activity manually and it gets launched from here.
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
this.startActivity(intent);
}
}
}
}
答案 2 :(得分：0)
我相信这不是那么复杂的问题，
可以分两步解决：
1.在激活活动时在一致的内存中设置布尔值 2.重新启动主活动时，在一致的内存中重置布尔值
开始活动之前1
SharedPreferences sp = context.getSharedPreferences("MyPrefs", MODE_PRIVATE);
if(sp.getBoolean("activity1",false)==false){
sp.edit().putBoolean ("activity1", true).commit();
startActivity(activity1);
}
在mainActivity的onCreate中添加此内容
@Override
protected void onCreate() {
SharedPreferences sp = context.getSharedPreferences("MyPrefs", MODE_PRIVATE);
sp.edit().putBoolean ("activity1", false).commit();
super.onResume();
}
如果需要，您可以创建SharedPreferences sp = context.getSharedPreferences("MyPrefs", MODE_PRIVATE);作为全局变量