布局文件

android:layout_width="match_parent"

android:layout_height="match_parent"

android:rowCount="6"

android:columnCount="4"

android:id="@+id/grid">

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_columnSpan="4"

android:textSize="50sp"

android:layout_marginLeft="4px"

android:layout_marginRight="4px"

android:padding="5px"

android:layout_gravity="right"

android:background="@android:color/white"

android:textColor="@android:color/black"

android:text="0"/>

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_columnSpan="4"

android:textSize="40sp"

android:text="清除"/>

源码

GridLayoutgridLayout;

String[]chars=newString[]{

"7","8","9","+",

"4","5","6","-",

"1","2","3","*",

".","0","=","/",

};

@Override

protected voidonCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

gridLayout= (GridLayout)findViewById(R.id.grid);

for(inti =0;i

Button bn =newButton(this);

bn.setText(chars[i]);

bn.setTextSize(40);

GridLayout.Spec rowSpec =  GridLayout.spec((i /4)+2);

GridLayout.Spec columnSpec = GridLayout.spec(i %4);

GridLayout.LayoutParams params =newGridLayout.LayoutParams(rowSpec,columnSpec);

gridLayout.addView(bn,params);

}

}