android/java/eclipse - 我有这个 java 文件:(Eight.java)
/**
*
*/
package com.apptemplate;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdView;
import com.hoerhager.christmas.R;
/**
*
*/
public class Eight extends Activity {
private AdView adView;
private Button btn81;
private Intent intent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.one);
adView = (AdView)this.findViewById(R.id.adView);
AdRequest adRequest = new AdRequest.Builder().build();
adView.loadAd(adRequest);
}
private void initialiseUI()
{
btn81 = (Button)findViewById(R.id.button81);
btn81.setOnClickListener((OnClickListener) this);
}
@Override
public void onPause() {
adView.pause();
super.onPause();
}
@Override
public void onResume() {
super.onResume();
adView.resume();
}
@Override
public void onDestroy() {
adView.destroy();
super.onDestroy();
}
public void onClick(View v)
{
if(v==btn81)
{
intent = new Intent(this,Eighta.class);
}
startActivity(intent);
}
}
这个 xml 文件:(eight.xml)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/eight" />
<com.google.android.gms.ads.AdView
android:id="@+id/adView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
ads:adSize="SMART_BANNER"
ads:adUnitId="@string/ads_unit_id" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="2.41"
android:text="@string/text8" />
<Button
android:id="@+id/button81"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:text="Preparation" />
</LinearLayout>
button81 不起作用,错误是什么?我是 Java 新手。它是一个用于测试的小型 Android 项目
最佳答案
您错过了在 onCreate() 方法中调用 initialiseUI() 函数:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.one);
adView = (AdView)this.findViewById(R.id.adView);
AdRequest adRequest = new AdRequest.Builder().build();
adView.loadAd(adRequest);
initialiseUI();
}
关于java - java android 按钮不起作用,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/20705135/