Add network tester client [android]

webrtc/tools/network_tester/androidapp/src/com/google/media/networktester/MainActivity.java

Index: webrtc/tools/network_tester/androidapp/src/com/google/media/networktester/MainActivity.java
diff --git a/webrtc/tools/network_tester/androidapp/src/com/google/media/networktester/MainActivity.java b/webrtc/tools/network_tester/androidapp/src/com/google/media/networktester/MainActivity.java
new file mode 100644
index 0000000000000000000000000000000000000000..2a78d6b9f9c3e1f8458049ed9fe38fbb2e56c401
--- /dev/null
+++ b/webrtc/tools/network_tester/androidapp/src/com/google/media/networktester/MainActivity.java
@@ -0,0 +1,66 @@
+/*
+ *  Copyright 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+package com.google.media.networktester;
+
+import android.app.Activity;
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.NetworkInfo;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.ParcelFileDescriptor;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.WindowManager;
+import android.widget.Button;
+
+public class MainActivity extends Activity {
+  Button startButton;
+  Button stopButton;
+  NetworkTester networkTester = null;
+  Handler mainThreadHandler;
+
+  @Override
+  protected void onCreate(Bundle savedInstanceState) {
+    super.onCreate(savedInstanceState);
+    setContentView(R.layout.activity_main);
+    startButton = (Button) findViewById(R.id.start_button);
+    startButton.setOnClickListener(new OnClickListener() {
+      @Override
+      public void onClick(View v) {
+        startTest();
+      }
+    });
+    stopButton = (Button) findViewById(R.id.stop_button);
+    stopButton.setOnClickListener(new OnClickListener() {
+      @Override
+      public void onClick(View v) {
+        stopTest();
+      }
+    });
+    mainThreadHandler = new Handler();
+    getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
+  }
+
+  private void startTest() {
+    if (networkTester == null) {
+      networkTester = new NetworkTester();
+      networkTester.start();
+    }
+  }
+
+  private void stopTest() {
+    if (networkTester != null) {
+      networkTester.interrupt();
+      networkTester = null;
+    }
+  }
+}