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package com.example.henryho.myapp005_multithreadtest;
 
import android.content.Context;
import android.os.Bundle;
import android.os.Message;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
 
 
public class MainActivity extends ActionBarActivity {
 
    private TextView txt_show;
    private Button btn_start;
    CountThread2 countThread2 = new CountThread2();
 
    android.os.Handler handler = new android.os.Handler() {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            txt_show.setText(Integer.toString(msg.getData().getInt("count", 0)));
        }
    };
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        txt_show = (TextView)findViewById(R.id.txt_show);
        btn_start = (Button)findViewById(R.id.btn_start);
 
        btn_start.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                countThread2.start();
            }
        });
    }
 
    class CountThread2 extends Thread {
        @Override
        public void run() {
            super.run();
            for (int i = 0; i < 10; i++) {
                try {
                    Thread.sleep(1000);
                    Bundle bundle = new Bundle();
                    bundle.putInt("count", i + 1);
                    Message message = new Message();
                    message.setData(bundle);
                    handler.handleMessage(message);
 
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}
 

Main.java:12: error: class MainActivity is public, should be declared in a file named MainActivity.java
public class MainActivity extends ActionBarActivity {
       ^
Main.java:3: error: package android.content does not exist
import android.content.Context;
                      ^
Main.java:4: error: package android.os does not exist
import android.os.Bundle;
                 ^
Main.java:5: error: package android.os does not exist
import android.os.Message;
                 ^
Main.java:6: error: package android.support.v7.app does not exist
import android.support.v7.app.ActionBarActivity;
                             ^
Main.java:7: error: package android.view does not exist
import android.view.View;
                   ^
Main.java:8: error: package android.widget does not exist
import android.widget.Button;
                     ^
Main.java:9: error: package android.widget does not exist
import android.widget.TextView;
                     ^
Main.java:12: error: cannot find symbol
public class MainActivity extends ActionBarActivity {
                                  ^
  symbol: class ActionBarActivity
Main.java:14: error: cannot find symbol
    private TextView txt_show;
            ^
  symbol:   class TextView
  location: class MainActivity
Main.java:15: error: cannot find symbol
    private Button btn_start;
            ^
  symbol:   class Button
  location: class MainActivity
Main.java:18: error: package android.os does not exist
    android.os.Handler handler = new android.os.Handler() {
              ^
Main.java:27: error: cannot find symbol
    protected void onCreate(Bundle savedInstanceState) {
                            ^
  symbol:   class Bundle
  location: class MainActivity
Main.java:18: error: package android.os does not exist
    android.os.Handler handler = new android.os.Handler() {
                                               ^
Main.java:26: error: method does not override or implement a method from a supertype
    @Override
    ^
Main.java:28: error: cannot find symbol
        super.onCreate(savedInstanceState);
        ^
  symbol:   variable super
  location: class MainActivity
Main.java:29: error: package R does not exist
        setContentView(R.layout.activity_main);
                        ^
Main.java:31: error: cannot find symbol
        txt_show = (TextView)findViewById(R.id.txt_show);
                    ^
  symbol:   class TextView
  location: class MainActivity
Main.java:31: error: package R does not exist
        txt_show = (TextView)findViewById(R.id.txt_show);
                                           ^
Main.java:32: error: cannot find symbol
        btn_start = (Button)findViewById(R.id.btn_start);
                     ^
  symbol:   class Button
  location: class MainActivity
Main.java:32: error: package R does not exist
        btn_start = (Button)findViewById(R.id.btn_start);
                                          ^
Main.java:34: error: package View does not exist
        btn_start.setOnClickListener(new View.OnClickListener() {
                                             ^
Main.java:49: error: cannot find symbol
                    Bundle bundle = new Bundle();
                    ^
  symbol:   class Bundle
  location: class MainActivity.CountThread2
Main.java:49: error: cannot find symbol
                    Bundle bundle = new Bundle();
                                        ^
  symbol:   class Bundle
  location: class MainActivity.CountThread2
Main.java:51: error: cannot find symbol
                    Message message = new Message();
                    ^
  symbol:   class Message
  location: class MainActivity.CountThread2
Main.java:51: error: cannot find symbol
                    Message message = new Message();
                                          ^
  symbol:   class Message
  location: class MainActivity.CountThread2
26 errors

Standard output is empty