Android 動態建立控制項

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 1 package com.metrox.absolutelayoutdemo; 2  3 import android.support.v7.app.AppCompatActivity; 4 import android.os.Bundle; 5 import android.view.Gravity; 6 import android.widget.Button; 7 import android.widget.GridLayout; 8  9 public class MainActivity extends AppCompatActivity {10 11     String[] chars = new String[]{12             "7","8","9","÷",13             "4","5","6","×",14             "1","2","3","-",15             ".","0","=","+"16     };17     @Override18     protected void onCreate(Bundle savedInstanceState) {19         super.onCreate(savedInstanceState);20         setContentView(R.layout.activity_main);21         GridLayout demogrid = (GridLayout)findViewById(R.id.root);22         for (int i = 0;i<chars.length;i++){23             Button bn = new Button(this);24             bn.setText(chars[i]);25             bn.setTextSize(40);26             bn.setPadding(5, 30, 5, 30);27             GridLayout.Spec rowSpec = GridLayout.spec(i / 4 + 2);28             GridLayout.Spec columnSpec = GridLayout.spec(i % 4);29             GridLayout.LayoutParams params = new GridLayout.LayoutParams(rowSpec,columnSpec);30             params.setGravity(Gravity.FILL);31             demogrid.addView(bn,params);32         }33     }34 }

 1 <?xml version="1.0" encoding="utf-8"?> 2 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 3     xmlns:tools="http://schemas.android.com/tools" 4     android:layout_width="match_parent" 5     android:layout_height="match_parent" 6     android:paddingBottom="@dimen/activity_vertical_margin" 7     android:paddingLeft="@dimen/activity_horizontal_margin" 8     android:paddingRight="@dimen/activity_horizontal_margin" 9     android:paddingTop="@dimen/activity_vertical_margin"10     tools:context="com.metrox.absolutelayoutdemo.MainActivity">11 12     <GridLayout13         android:layout_width="match_parent"14         android:layout_height="match_parent"15         android:columnCount="4"16         android:rowCount="6"17         android:id="@+id/root">18 19         <TextView20             android:layout_width="match_parent"21             android:layout_height="wrap_content"22             android:text="0"23             android:id="@+id/textView"24             android:layout_columnSpan="4"25             android:layout_marginLeft="2pt"26             android:layout_marginRight="2pt"27             android:padding="3pt"28             android:gravity="right"29             android:textSize="35sp"30             android:background="#eee"31             android:textColor="#000" />32 33         <Button34             android:layout_width="match_parent"35             android:layout_height="wrap_content"36             android:text="清除"37             android:layout_columnSpan="4"38             android:id="@+id/button" />39     </GridLayout>40 </RelativeLayout>

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.metrox.absolutelayoutdemo">    <application        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:supportsRtl="true"        android:theme="@style/AppTheme">        <activity android:name=".MainActivity">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application></manifest>

 

Android 動態建立控制項