Android4.0新增的 網格佈局：計算器

cn.nuc.calc包下MainActivity.java

package cn.nuc.calcu;


import cn.nuc.calcu.R.id;
import android.app.Activity;
import android.app.ActionBar;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.animation.GridLayoutAnimationController;
import android.widget.Button;
import android.widget.GridLayout;
import android.widget.TextView;
import android.os.Build;


public class MainActivity extends Activity {
GridLayout gridLayout;
Button button;
TextView tView;
String[] chars=new String[]{
"7","8","9","/",
"4","5","6","*",
"1","2","3","-",
".","0","=","+"
};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        gridLayout=(GridLayout) findViewById(R.id.root);
        tView=(TextView) findViewById(R.id.text);
        //button=(Button) findViewById(R.id.btn);
        OnClickListener listener=new OnClickListener()
    {
   
    @Override
    public void onClick(View arg0)
    {
    tView.setText("");
    }
    };
        
        for (int i = 0; i < chars.length; i++)
{
button=new Button(this);
button.setText(chars[i]);
button.setTextSize(40);
//獲取計算器按鈕的行數
GridLayout.Spec rowSpec=GridLayout.spec(i/4+2);
//獲取計算器按鈕的列數
GridLayout.Spec coloumSpec=GridLayout.spec(i%4);
GridLayout.LayoutParams params=new GridLayout.LayoutParams(rowSpec,coloumSpec);
//使用組件填充父容器
params.setGravity(GridLayout.FIND_VIEWS_WITH_TEXT);
//params.setGravity(GridLayout.FILL);
gridLayout.addView(button, params);
}
   //button按鈕的監聽事件
    button.setOnClickListener(listener);
    }
}

佈局文件中main.xml

<?xml version="1.0" encoding="utf-8"?>
<GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:columnCount="4"
    android:rowCount="6"
    android:id="@+id/root"
    android:background="@drawable/bg"
     >
     <TextView 
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="0"
         android:layout_columnSpan="4"
         android:id="@+id/text"
         android:background="#eee"
         android:textColor="#000"
         android:layout_gravity="right"
         android:layout_marginLeft="4px"
         android:layout_marginRight="4px"
         android:padding="4px"
         android:textSize="50sp"      
         />
    <!--  android:hint="數字顯示" -->
    <Button 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_columnSpan="4"
        android:text="清除"
        />
</GridLayout>