Android Can';工作完成后,不要停止worker(ListenableWorker)任务
我似乎找不到正确的方法来停止我的工作任务。我正在调用Android Can';工作完成后,不要停止worker(ListenableWorker)任务,android,worker,Android,Worker,我似乎找不到正确的方法来停止我的工作任务。我正在调用.set(Result.success()),但它从未在我的类中触发onStopped(),并且其他订阅的回调似乎仍在我的工作进程中处于活动状态 我的工作人员启动并尝试查找特定的设备 它连接到该设备并尝试退出,结果为Result.success() 如果工作进程已运行超过3分钟,则尝试退出 调用Result.success()后,在我连接到BLE设备后,它仍会在connectionstatechange内部connectGatt()函数中保
.set(Result.success())在我的ResolvableFuture
上执行code>,但它从未在我的类中触发onStopped()
,并且其他订阅的回调似乎仍在我的工作进程中处于活动状态
- 我的工作人员启动并尝试查找特定的设备
- 它连接到该设备并尝试退出,结果为
Result.success()
- 如果工作进程已运行超过3分钟,则尝试退出
调用Result.success()
后,在我连接到BLE设备后,它仍会在connectionstatechange
内部connectGatt()
函数中保留对onConnectionStateChange
的活动引用
即使在操作系统强制停止我的工作程序后,它似乎也不会调用onStopped()
,因为我不记得在日志中见过它
即使创建了一个新的worker,我仍然会在旧worker中使用onConnectionStateChange
package test;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothGatt;
import android.bluetooth.BluetoothGattCallback;
import android.bluetooth.BluetoothManager;
import android.bluetooth.BluetoothProfile;
import android.bluetooth.le.ScanCallback;
import android.bluetooth.le.ScanFilter;
import android.bluetooth.le.ScanResult;
import android.bluetooth.le.ScanSettings;
import android.content.Context;
import android.os.Build;
import android.os.Handler;
import android.util.Log;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import androidx.concurrent.futures.ResolvableFuture;
import androidx.work.ListenableWorker;
import androidx.work.WorkerParameters;
import com.google.common.util.concurrent.ListenableFuture;
import java.util.ArrayList;
import java.util.List;
import static android.bluetooth.BluetoothDevice.TRANSPORT_LE;
import static android.os.Build.VERSION_CODES.M;
public class BluetoothScanWorker extends ListenableWorker {
private String TAG = "BluetoothScanWorker";
private BluetoothAdapter bluetoothAdapter;
private ResolvableFuture<Result> mFuture;
public BluetoothScanWorker(@NonNull Context context, @NonNull WorkerParameters workerParams) {
super(context, workerParams);
}
@NonNull
@Override
public ListenableFuture<Result> startWork() {
mFuture = ResolvableFuture.create();
Log.d(TAG ,"startWork()");
if (Build.VERSION.SDK_INT >= M) {
ScanSettings settings = (new ScanSettings.Builder().setScanMode(ScanSettings.SCAN_MODE_LOW_POWER)).build();
List<ScanFilter> filters_v2 = new ArrayList<>();
ScanFilter scanFilter = new ScanFilter.Builder()
.setDeviceAddress("B8:27:EB:B9:5C:FC")
.build();
filters_v2.add(scanFilter);
BluetoothManager bluetoothManager =
(BluetoothManager) this.getApplicationContext().getSystemService(Context.BLUETOOTH_SERVICE);
bluetoothAdapter = bluetoothManager.getAdapter();
bluetoothAdapter.getBluetoothLeScanner().startScan(filters_v2, settings, leScanCallback); // Scan for every BLE device matching my filter
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
endWork();
}
}, 3*60*1000); // End worker after 3 minutes
}
return mFuture;
}
private void endWork(){
if (Build.VERSION.SDK_INT >= M) {
Log.d(TAG, "END WORK");
bluetoothAdapter.getBluetoothLeScanner().stopScan(leScanCallback);
mFuture.set(Result.success());
}
}
@RequiresApi(M)
private ScanCallback leScanCallback = new ScanCallback() { // Called when I find my BLE device
@Override
public void onScanResult(int callbackType, ScanResult result) {
Log.d(TAG ,"onScanResult: " + result.getDevice().toString());
bluetoothAdapter.getBluetoothLeScanner().stopScan(this);
result.getDevice().connectGatt(getApplicationContext(), true, new BluetoothGattCallback() { // Connect to my BLE device
@Override
public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
if (newState == BluetoothProfile.STATE_CONNECTED) {
if (status == BluetoothGatt.GATT_SUCCESS) {
Log.d(TAG ,"GATT connected successfully");
endWork();
}
} else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
Log.d(TAG ,"GATT disconnected");
endWork();
}
}
},TRANSPORT_LE);
}
};
@Override
public void onStopped() {
Log.d(TAG, "Work service stopped");
}
}
封装测试;
导入android.bluetooth.BluetoothAdapter;
导入android.bluetooth.BluetoothGatt;
导入android.bluetooth.BluetoothGattCallback;
导入android.bluetooth.BluetoothManager;
导入android.bluetooth.BluetoothProfile;
导入android.bluetooth.le.ScanCallback;
导入android.bluetooth.le.ScanFilter;
导入android.bluetooth.le.ScanResult;
导入android.bluetooth.le.ScanSettings;
导入android.content.Context;
导入android.os.Build;
导入android.os.Handler;
导入android.util.Log;
导入androidx.annotation.NonNull;
导入androidx.annotation.RequiresApi;
导入androidx.concurrent.futures.ResolvableFuture;
导入androidx.work.ListenableWorker;
导入androidx.work.worker参数;
导入com.google.common.util.concurrent.ListenableFuture;
导入java.util.ArrayList;
导入java.util.List;
导入静态android.bluetooth.BluetoothDevice.TRANSPORT\u LE;
导入静态android.os.Build.VERSION\u CODES.M;
公共类BluetoothScanWorker扩展ListenableWorker{
私有字符串TAG=“BluetoothScanWorker”;
私人蓝牙适配器;
私人可决议的未来;
公共BluetoothScanWorker(@NonNull上下文,@NonNull WorkerParameters workerParams){
超级(上下文、工作参数);
}
@非空
@凌驾
可公开上市的未来startWork(){
mFuture=ResolvableFuture.create();
Log.d(标记“startWork()”);
如果(Build.VERSION.SDK_INT>=M){
ScanSettings settings=(新建ScanSettings.Builder().setScanMode(ScanSettings.SCAN_MODE_LOW_POWER)).build();
列表筛选器_v2=new ArrayList();
ScanFilter ScanFilter=new ScanFilter.Builder()
.setDeviceAddress(“B8:27:EB:B9:5C:FC”)
.build();
过滤器2.添加(扫描过滤器);
蓝牙管理器蓝牙管理器=
(BluetoothManager)this.getApplicationContext().getSystemService(Context.BLUETOOTH_服务);
bluetoothAdapter=bluetoothManager.getAdapter();
bluetoothAdapter.getBluetoothLeScanner().startScan(过滤器_v2,设置,leScanCallback);//扫描与我的过滤器匹配的每个BLE设备
Handler=newhandler();
handler.postDelayed(新的Runnable(){
@凌驾
公开募捐{
收尾工作();
}
},3*60*1000);//3分钟后结束工作
}
回归未来;
}
私人工程(){
如果(Build.VERSION.SDK_INT>=M){
日志d(标签“结束工作”);
bluetoothAdapter.getBluetoothLeScanner().stopScan(leScanCallback);
mFuture.set(Result.success());
}
}
@要求API(M)
private ScanCallback leScanCallback=new ScanCallback(){//在我找到我的可扩展设备时调用
@凌驾
公共void onScanResult(int callbackType、ScanResult){
Log.d(标记“onScanResult:+result.getDevice().toString());
bluetoothAdapter.getBluetoothLeScanner().stopScan(此);
result.getDevice().connectGatt(getApplicationContext(),true,新的BluetoothGattCallback(){//连接到我的BLE设备
@凌驾
连接状态更改的公共无效(蓝牙gatt gatt、int状态、int新闻状态){
if(newState==BluetoothProfile.STATE\u CONNECTED){
如果(状态==蓝牙GATT.GATT\U成功){
Log.d(标记“GATT连接成功”);
收尾工作();
}
}else if(newState==BluetoothProfile.STATE\u已断开连接){
日志d(标签“GATT断开”);
收尾工作();
}
}
},运输署);
}
};
@凌驾
公共空间{
日志d(标签“工作服务已停止”);
}
}
注意,ListenableWorker.onStopped()
方法仅在工人被取消或任务被系统抢占时调用。如果工作进程已成功完成,则不会调用onStop()
。onStop()
:
当此工作者被告知停止时,将调用此方法。。。
这可能是由于用户发出明确的取消信号,
或者是因为系统决定抢先完成任务
有时,即使工作进程成功完成,也可以调用onStop()
回调,但这将在将来得到修复。看看这篇帖子:那么,返回成功或失败的结果并不会告诉工人它已经完成了,应该停止了?那么,我如何停止当前正在运行的任务(而不取消重复工作的下一个任务)。@somerandomusername当您从startWork返回成功或失败结果时(