Implement NetworkRequestDialog architecture(cont.)

For NetworkRequestTimeoutDialogFragment, the dialog show after WiFi
scanning timeout or get no WiFi ap to list. Dialog will ask if user
want to continue scanning or cancel.

Bug: 117399926
Test: RunSettingsRoboTests
Change-Id: I0551a753c10265e69a7830833813852a95eab5ef

src/com/android/settings/wifi/NetworkRequestDialogFragment.java

@@ -19,6 +19,8 @@ package com.android.settings.wifi;
 import android.app.Dialog;
 import android.content.Context;
 import android.content.DialogInterface;
+import android.os.Handler;
+import android.os.Message;
 import androidx.appcompat.app.AlertDialog;
 import android.os.Bundle;
 import android.view.LayoutInflater;
@@ -37,14 +39,16 @@ import java.util.List;
 public class NetworkRequestDialogFragment extends InstrumentedDialogFragment implements
     DialogInterface.OnClickListener {
 
+  /** Message sent to us to stop scanning wifi and pop up timeout dialog. */
+  private static final int MESSAGE_STOP_SCAN_WIFI_LIST = 0;
+
+  /** Delayed time to stop scanning wifi. */
+  private static final int DELAY_TIME_STOP_SCAN_MS = 30*1000;
+
   private List<AccessPoint> mAccessPointList;
 
-  public static NetworkRequestDialogFragment newInstance(int uid, String packageName) {
-    Bundle args = new Bundle();
-    args.putInt("uid", uid);
-    args.putString("packageName", packageName);
+  public static NetworkRequestDialogFragment newInstance() {
     NetworkRequestDialogFragment dialogFragment = new NetworkRequestDialogFragment();
-    dialogFragment.setArguments(args);
     return dialogFragment;
   }
 
@@ -84,6 +88,44 @@ public class NetworkRequestDialogFragment extends InstrumentedDialogFragment imp
   public void onClick(DialogInterface dialog, int which) {
   }
 
+  @Override
+  public void onPause() {
+    super.onPause();
+
+    mHandler.removeMessages(MESSAGE_STOP_SCAN_WIFI_LIST);
+  }
+
+  @Override
+  public void onResume() {
+    super.onResume();
+
+    // TODO(b/117399926): Starts to scan current WiFi.
+
+    // Sets time-out to stop scanning.
+    mHandler.sendEmptyMessageDelayed(MESSAGE_STOP_SCAN_WIFI_LIST, DELAY_TIME_STOP_SCAN_MS);
+  }
+
+  private Handler mHandler = new Handler() {
+    @Override
+    public void handleMessage(Message msg) {
+      switch (msg.what) {
+        case MESSAGE_STOP_SCAN_WIFI_LIST:
+          removeMessages(MESSAGE_STOP_SCAN_WIFI_LIST);
+          stopScanningAndPopTimeoutDialog();
+          break;
+        default:
+          // Do nothing.
+          break;
+      }
+    }
+  };
+
+  protected void stopScanningAndPopTimeoutDialog() {
+    dismiss();
+    NetworkRequestTimeoutDialogFragment fragment = NetworkRequestTimeoutDialogFragment.newInstance();
+    fragment.show(getActivity().getSupportFragmentManager(), null);
+  }
+
   @Override
   public int getMetricsCategory() {
     return MetricsProto.MetricsEvent.WIFI_SCANNING_NEEDED_DIALOG;