MainActivity.java

package com.kale.gridlayout;import android.app.Activity;import android.os.Bundle;import android.support.v7.widget.GridLayout;import android.view.Gravity;import android.widget.Button;public class MainActivity extends Activity {	String [] chars = new String[]{		"7","8","9","÷",		"4","5","6","x",		"1","2","3","-",		".","0","=","+"	};	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);				GridLayout gLayout = (GridLayout)findViewById(R.id.root_gridLayout_id);		for (int i = 0; i < chars.length; i++) {			Button bt = new Button(this);			bt.setText(chars[i]);			bt.setTextSize(40);						//指定该组件所占的行			GridLayout.Spec rowSpec = GridLayout.spec(i/4 + 2);			//指定该组件所占的列			GridLayout.Spec columnSpec = GridLayout.spec(i % 4); 			//按照设置好的行和列来建立对象			GridLayout.LayoutParams params = new GridLayout.LayoutParams(rowSpec,columnSpec);			//指定该组件占满父控件			params.setGravity(Gravity.FILL);			gLayout.addView(bt,params);		}			}}

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