这篇文章将为大家详细讲解有关怎么在Android中显示一个计算器界面,文章内容质量较高,因此小编分享给大家做个参考,希望大家阅读完这篇文章后对相关知识有一定的了解。
XML文件:
<?xml version="1.0" encoding="utf-8"?> <GridLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent" android:rowCount="6" android:columnCount="4" android:id="@+id/root"> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_columnSpan="4" android:textSize="50sp" android:layout_marginLeft="2pt" android:layout_marginRight="2pt" android:padding="3pt" android:layout_gravity="right" android:background="#eee" android:textColor="#000" android:text="0" /> <Button android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_columnSpan="4" android:text="清除"/> </GridLayout>
MainActivity:
package learn.li.com.learnthree; import android.os.Handler; import android.os.Message; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.Gravity; import android.widget.Button; import android.widget.GridLayout; import android.widget.TextView; import java.util.Timer; import java.util.TimerTask; public class MainActivity extends AppCompatActivity { GridLayout gridLayout; 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 = (GridLayout)findViewById(R.id.root); for(int i = 0;i < chars.length;i++){ Button bn = new Button(this); bn.setText(chars[i]); bn.setTextSize(40); bn.setPadding(5,35,5,35); GridLayout.Spec rowSpec = GridLayout.spec(i/4 + 2); GridLayout.Spec columnSpec = GridLayout.spec(i%4); GridLayout.LayoutParams params = new GridLayout.LayoutParams(rowSpec,columnSpec); params.setGravity(Gravity.FILL); gridLayout.addView(bn,params); } } }
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