From 4c6fc633f2d4d0cd0d4d80ebc7e71f826003f361 Mon Sep 17 00:00:00 2001
From: Eugene Crosser <crosser@average.org>
Date: Sun, 8 Aug 2010 18:54:03 +0400
Subject: [PATCH] start thread and communicate with it

---
 res/layout/main.xml                           | 16 ++++-
 .../udpresponder/UdpRespondActivity.java      | 72 ++++++++++++++++---
 2 files changed, 76 insertions(+), 12 deletions(-)

diff --git a/res/layout/main.xml b/res/layout/main.xml
index 3ffa301..9caf5f6 100644
--- a/res/layout/main.xml
+++ b/res/layout/main.xml
@@ -4,10 +4,20 @@
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     >
-<TextView  
-    android:layout_width="fill_parent" 
+<Button android:id="@+id/btn_stop"
+    android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
-    android:text="Hello World, UdpRespondActivity"
+    android:text="Stop"
+    />
+<Button android:id="@+id/btn_start"
+    android:layout_width="wrap_content" 
+    android:layout_height="wrap_content" 
+    android:text="Start"
+    />
+<TextView android:id="@+id/tv"
+    android:layout_width="wrap_content" 
+    android:layout_height="wrap_content" 
+    android:text="UdpRespondActivity"
     />
 </LinearLayout>
 
diff --git a/src/com/example/udpresponder/UdpRespondActivity.java b/src/com/example/udpresponder/UdpRespondActivity.java
index b0e54ea..7ef9709 100644
--- a/src/com/example/udpresponder/UdpRespondActivity.java
+++ b/src/com/example/udpresponder/UdpRespondActivity.java
@@ -2,14 +2,68 @@ package com.example.udpresponder;
 
 import android.app.Activity;
 import android.os.Bundle;
+import android.os.Handler;
+import android.os.Message;
+import android.os.SystemClock;
+import android.widget.TextView;
+import android.widget.Button;
+import android.view.View;
+import android.view.View.OnClickListener;
 
-public class UdpRespondActivity extends Activity
-{
-    /** Called when the activity is first created. */
-    @Override
-    public void onCreate(Bundle savedInstanceState)
-    {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.main);
-    }
+public class UdpRespondActivity extends Activity {
+
+	private Handler mHandler = new Handler() {
+		public void handleMessage(Message msg) {
+			Bundle bdl = msg.getData();
+			updateUI(bdl.getString("ln"));
+		}
+	};
+
+	private TextView tv;
+
+	private OnClickListener mStartListener = new OnClickListener() {
+		public void onClick(View v) {
+			tv.append("Start pressed\n");
+		}
+	};
+
+	private OnClickListener mStopListener = new OnClickListener() {
+		public void onClick(View v) {
+			tv.append("Stop pressed\n");
+			finish();
+		}
+	};
+
+	@Override
+	public void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.main);
+		tv = (TextView)findViewById(R.id.tv);
+		tv.append(" Starting\n");
+		Button btn_start = (Button)findViewById(R.id.btn_start);
+		btn_start.setOnClickListener(mStartListener);
+		Button btn_stop = (Button)findViewById(R.id.btn_stop);
+		btn_stop.setOnClickListener(mStopListener);
+		startBgThread();
+	}
+
+	private void updateUI(String str) {
+		tv.append(str);
+	}
+
+	protected void startBgThread () {
+		Thread t = new Thread() {
+			public void run() {
+				while (true) {
+					SystemClock.sleep(3000);
+					Bundle bdl = new Bundle();
+					bdl.putString("ln", "this is msg\n");
+					Message msg = Message.obtain(mHandler);
+					msg.setData(bdl);
+					msg.sendToTarget();
+				}
+			}
+		};
+		t.start();
+	}
 }
-- 
2.39.2