안녕하세요. Android 4.1.2를 사용하는 기기에서 앱을 실행하려고하는데이 오류가 발생합니다. 어떤 이유로 내 애플 리케이션 안드로이드 7.0에서 잘 작동합니다. 내 프로젝트에서 나는이 라이브러리를 사용한다. eu.long1.spacetablayout.SpaceTabLayout 나는이 문제의 원인이라고 생각한다. 누군가이 문제를 해결하도록 도와주십시오.android에서 활동 ComponentInfo를 인스턴스화 할 수 없습니다. 4.1.2
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{maa.myfirstapp/maa.myfirstapp.MainActivity}: java.lang.ClassNotFoundException: maa.myfirstapp.MainActivity
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2016)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2117)
at android.app.ActivityThread.access$700(ActivityThread.java:134)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1218)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4867)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1007)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:774)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassNotFoundException: maa.myfirstapp.MainActivity
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
at android.app.Instrumentation.newActivity(Instrumentation.java:1068)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2007)
Manifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="maa.myfirstapp">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.SET_WALLPAPER"/>
<uses-permission android:name="android.permission.SET_WALLPAPER_HINTS"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<application
android:hardwareAccelerated="true"
android:largeHeap="true"
tools:replace="android:icon"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:screenOrientation="portrait"
android:name="maa.myfirstapp.MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:screenOrientation="portrait"
android:name=".Pop"
android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen" />
</application>
</manifest>
mainactivity :
package maa.myfirstapp;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
import eu.long1.spacetablayout.SpaceTabLayout;
public class MainActivity extends AppCompatActivity {
SpaceTabLayout tabLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//add the fragments you want to display in a List
List<Fragment> fragmentList = new ArrayList<>();
fragmentList.add(new fr1());
fragmentList.add(new fr2());
fragmentList.add(new fr3());
fragmentList.add(new fr4());
fragmentList.add(new fr5());
ViewPager viewPager = findViewById(R.id.viewPager);
tabLayout = findViewById(R.id.spaceTabLayout);
tabLayout.initialize(viewPager, getSupportFragmentManager(), fragmentList,savedInstanceState);
/*icon*/
tabLayout.setTabOneIcon(getResources().getDrawable(R.drawable.a));
tabLayout.setTabTwoIcon(getResources().getDrawable(R.drawable.qs));
tabLayout.setTabThreeIcon(getResources().getDrawable(R.drawable.r));
tabLayout.setTabFourIcon(getResources().getDrawable(R.drawable.an));
tabLayout.setTabFiveIcon(getResources().getDrawable(R.mipmap.mea));
/**/
}
}
전체 활동 코드 표시!? – Xenolion
@ Xenolion 제 업데이트 포스트를 참조하십시오 –
사실 저는 MainActivity의 코드가 필요 없지만 그 주제에 가져온 패키지를 가져오고 싶습니다. – Xenolion