Question

我按照所有步骤导入google-play-services，尝试重新安装sdk，重新导入。我尝试添加权重和文本视图以给它空间...我在过去的两天里尝试了所有内容，但是在xml布局的图形界面上不断出现这个错误：

the following classes could not be instantiated: - com.google.android.gms.ads.AdView.

*******清单* / **********

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.alphaking.xxxxxxe"
    android:versionCode="1"
    android:versionName="1.0" >
<uses-feature android:name="android.hardware.sensor.accelerometer" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.INTERNET" />
        <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

    <uses-sdk
        android:minSdkVersion="14"
        android:targetSdkVersion="19" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@android:style/Theme.NoTitleBar" >

        <activity
             android:screenOrientation="portrait"
            android:name="xxxxxxxxxe.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.STARTINGPOINTS" />

                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>

        <activity
            android:screenOrientation="portrait"
            android:name="com.alphaking.ijumprope.Settings"
            android:label="@string/app_name" >
        </activity>

        <activity
            android:screenOrientation="portrait"
            android:name="com.alphaking.ijumprope.Start"
            android:label="@string/app_name" >
        </activity>

        <activity
            android:screenOrientation="portrait"
            android:name="xxxxxxxxxxxxx.Logs"
            android:label="@string/app_name" >
        </activity>

        <activity
            android:screenOrientation="portrait"
            android:name="cxxxxxxxxe.About"
            android:label="@string/app_name" >
        </activity>

         <activity
            android:screenOrientation="portrait"
            android:name="xxxxxxxxxxx.Splash"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

         <activity android:name="com.google.android.gms.ads.AdActivity"
              android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"/>

        <meta-data android:name="com.google.android.gms.version"
               android:value="@integer/google_play_services_version"/>



    </application>

</manifest>

***** //////// ***********主要活动java ********** ************

package cxxxxxxxxxxxxxxxxxxx;

import com.alphxxxxxxgxxxxxxxxxx;
import com.google.android.gms.ads.*;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;


public class MainActivity extends Activity{

    Button setting,start,logs,about;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        AdView adView = (AdView) this.findViewById(R.id.adView);
        AdRequest adRequest = new AdRequest.Builder().build();
        adView.loadAd(adRequest);

        setting=(Button) findViewById(R.id.button2);
        setting.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                try{
                    Class ourClass = Class.forName("com.xxxxxxxxxxxxx.Settings");
                    Intent ourIntent = new Intent(MainActivity.this, ourClass);
                    startActivity(ourIntent);
                    }catch(ClassNotFoundException e){
                        e.printStackTrace();
                    }
            }
        });

        start=(Button) findViewById(R.id.button1);
        start.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                try{
                    Class ourClass = Class.forName("com.alphaking.ijumprope.Start");
                    Intent ourIntent = new Intent(MainActivity.this, ourClass);
                    startActivity(ourIntent);
                    }catch(ClassNotFoundException e){
                        e.printStackTrace();
                    }
            }
        });

        logs=(Button) findViewById(R.id.button3);
        logs.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                try{
                    Class ourClass = Class.forName("cxxxxxxxxxxxx
                    Intent ourIntent = new Intent(MainActivity.this, ourClass);
                    startActivity(ourIntent);
                    }catch(ClassNotFoundException e){
                        e.printStackTrace();
                    }
            }
        });

        about=(Button) findViewById(R.id.button4);
        about.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                try{
                    Class ourClass = Class.forName("xxxxxxxxxxxxxxAbout");
                    Intent ourIntent = new Intent(MainActivity.this, ourClass);
                    startActivity(ourIntent);
                    }catch(ClassNotFoundException e){
                        e.printStackTrace();
                    }
            }
        });


    }
    public void onBackPressed() {
    }


}

********************** XML ********************* *************

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:ads="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.alphaking.xxxxxxxxxxxxxActivity"
    android:background="@drawable/back"
    android:layout_centerHorizontal="true"
    android:layout_centerVertical="true" >

    <Button
        android:id="@+id/button1"
        android:layout_width="120dp"
        android:layout_height="60dp"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="40dp"
        android:background="@drawable/start" />

    <Button
        android:id="@+id/button2"
        android:layout_width="120dp"
        android:layout_height="60dp"
        android:layout_alignLeft="@+id/button1"
        android:layout_below="@+id/button1"
        android:layout_marginTop="30dp"
        android:background="@drawable/setup" />

    <Button
        android:id="@+id/button3"
        android:layout_width="120dp"
        android:layout_height="60dp"
        android:layout_alignLeft="@+id/button2"
        android:layout_below="@+id/button2"
        android:layout_marginTop="30dp"
        android:background="@drawable/logs" />

    <Button
        android:id="@+id/button4"
        android:layout_width="120dp"
        android:layout_height="60dp"
        android:layout_alignLeft="@+id/button3"
        android:layout_below="@+id/button3"
        android:layout_marginTop="30dp"
        android:background="@drawable/about" />

    <com.google.android.gms.ads.AdView
        android:layout_width="320dp"
        android:layout_height="50dp"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        ads:adSize="BANNER"
        ads:adUnitId="ca-app-pub-1278770925901425/7987430192"
        ads:loadAdOnCreate="true"
        android:gravity="center" >
    </com.google.android.gms.ads.AdView>

</RelativeLayout>

Answer 1

这是因为您在清单文件中添加了错误的活动类。所以只需改变它。

<activity android:name="com.google.android.gms.ads.AdActivity"
              android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"/>

Answer 2

这对我来说是暂时的解决方法。我将Google Play Services SDK的版本从5.x降级回4.x.我使用Intellij Community 13.x和Gradle，所以我的依赖部分现在看起来像这样：

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:support-v4:20.0.0'
    compile 'com.android.support:appcompat-v7:20.0.0'
    compile 'com.google.android.gms:play-services:4.+'
}

再次，暂时允许我完成构建XML布局文件。我计划在进入最终测试阶段时升级到最新版本5.x.我已经向Google AdMob广告开发者论坛提出了有关此问题的问题，希望能引起别人的注意。不确定在何处为此特定SDK提交错误报告。。

Answer 3

在清单中声明com.google.android.gms.ads.AdActivity，即。在您的清单文件更改

 <activity android:name="com.google.android.gms.ads.AdView"
               android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"/>

到

 <activity android:name="com.google.android.gms.ads.AdActivity"
                  android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"/>

有关详细信息，请参阅Declare com.google.android.gms.ads.AdActivity

还要在xml视图中添加android:id="@+id/adView"

 <com.google.android.gms.ads.AdView
        android:id="@+id/adView"
        android:layout_width="320dp"
        android:layout_height="50dp"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        ads:adSize="BANNER"
        ads:adUnitId="ca-app-pub-1278770925901425/7987430192"
        ads:loadAdOnCreate="true"
        android:gravity="center" >
    </com.google.android.gms.ads.AdView>

别忘了清除项目。

有关详细信息，请参阅Create your banner in XML

Answer 4

转到dimens.xml并将布局边距值从16dp更改为0dp。

Answer 5

这对我有用：

打开xml布局，切换到文本视图，在预览窗格中单击刷新按钮，问题将得到解决。< / p>

如果问题仍然存在，请确保您的应用的build.gradle文件中包含firebase ads依赖项：

编译'com.google.firebase：firebase-ads：9.8.0'

Admob xml：无法实例化以下类： - com.google.android.gms.ads.AdView

5 个答案: