照第一行代码敲的,发现根本不能运行,故来请教各位大神。
首先布局文件first_layout.xml:
<?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="@string Button 1" />
其次firstActivity.java中:
package com.example.activitytest;
import android.app.Activity;
import android.os.Bundle;
public class FirstActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.first_layout);
}
}
最后AndroidMainfest中:
package="com.example.activitytest"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/Button 1"
android:theme="@style/AppTheme" >
<activity
android:name=".FirstActivity"
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>
代码如上,但却不能运行,错误怎么纠正呢?