package applegrowing.applegrowing;
/*
MainActivity.java
*/
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ImageView;
import android.widget.LinearLayout;
public class MainActivity extends AppCompatActivity {
private int[] szApple = new int[]{R.drawable.apple_1,R.drawable.apple_2,R.drawable.apple_3,R.drawable.apple_4};
private ImageView imageView;
private final int iMsgFlag = 0x110;
private int index = 0;
private LinearLayout linearLayout;
private Handler handler = new Handler(new Handler.Callback() {
@Override
public boolean handleMessage(Message msg) {
if (msg.what == iMsgFlag){
imageView.setImageResource(szApple[index++]);
if (szApple.length == index)
{
index = 0;
}
}
return false;
}
}) ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
linearLayout = (LinearLayout) findViewById(R.id.ll);
imageView = new ImageView(this);
linearLayout.addView(imageView);
new Thread(changeAppleState).start();
}
Runnable changeAppleState = new Runnable() {
@Override
public void run() {
while (!Thread.currentThread().isInterrupted()){
Message message = new Message();
message.what = iMsgFlag;
handler.sendMessage(message);
try {
Thread.sleep(500);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
};
}
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/*****layout.xml***/
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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center"
android:id="@+id/ll"
tools:context="applegrowing.norway.cn.applegrowing.MainActivity">
</LinearLayout>
