目的是如图片:
FirtsActivity. java文件:
package com.example.activitytest;
import android.os.Bundle;
import android.app.Activity;
public class FirstActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.first_layout);
}
}
first_layout文件:
<?xml version="1.0" encoding="utf-8"?>
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<Button
android:id="@+id/button_1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Button 1"
/>
AndroidMainfest.xml:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.activitytest"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="L"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.activitytest.FirstActivit"
android:label="This is FirstActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>