如何解决.RuntimeException:无法实例化活动ComponentInfo java.lang.ClassNotFoundException:找不到类“ moveitech.com.MainActivity”
关于这个问题,我尝试了很多互联网上可用的方法,但是没有任何工作对我有用。对我来说真的很忙。活动名称正确写在清单中,包名称正确,我也尝试过清理并重建。
以下是我的清单文件
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="moveitech.com">
<uses-permission android:name="android.permission.INTERNET"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme"
tools:ignore="GoogleAppIndexingWarning">
<activity android:name="moveitech.com.MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
以下是主要活动代码
package moveitech.com;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
import android.os.Bundle;
import android.view.MenuItem;
import com.google.android.material.bottomnavigation.BottomNavigationView;
import retrofit2.Call;
public class MainActivity extends AppCompatActivity {
private BottomNavigationView bottomNavigationView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bottomNavigationView= findViewById(R.id.bottomNavigationView);
bottomNavigationView.setonNavigationItemSelectedListener(navigationItemSelectedListener);
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,newSearch_f()).commit();
}
private BottomNavigationView.OnNavigationItemSelectedListener navigationItemSelectedListener=
new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
Fragment selectedFragment =null;
switch (item.getItemId())
{
case R.id.search:
selectedFragment= new Search_f();
break;
case R.id.URL:
selectedFragment= new url_search();
break;
case R.id.setting:
selectedFragment= new Setting_f();
break;
}
getSupportFragmentManager().beginTransaction()
.replace(R.id.fragment_container,selectedFragment).commit();
return true;
}
};
}
这是错误
E/AndroidRuntime: FATAL EXCEPTION: main
Process: moveitech.com,PID: 4650
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{moveitech.com/moveitech.com.MainActivity}: java.lang.classNotFoundException: Didn't find class "moveitech.com.MainActivity" on path: DexPathList[[zip file "/data/app/moveitech.com-oBXiVvWbQxARq8cgEZrnpA==/base.apk"],nativeLibraryDirectories=[/data/app/moveitech.com-oBXiVvWbQxARq8cgEZrnpA==/lib/arm64,/system/lib64,/system/vendor/lib64]]
at android.app.ActivityThread.performlaunchActivity(ActivityThread.java:2841)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3032)
at android.app.ActivityThread.-wrap11(UnkNown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1696)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6944)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
Caused by: java.lang.classNotFoundException: Didn't find class "moveitech.com.MainActivity" on path: DexPathList[[zip file "/data/app/moveitech.com-oBXiVvWbQxARq8cgEZrnpA==/base.apk"],/system/vendor/lib64]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:93)
at java.lang.classLoader.loadClass(ClassLoader.java:379)
at java.lang.classLoader.loadClass(ClassLoader.java:312)
at android.app.Instrumentation.newActivity(Instrumentation.java:1180)
at android.app.ActivityThread.performlaunchActivity(ActivityThread.java:2831)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3032)
at android.app.ActivityThread.-wrap11(UnkNown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1696)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6944)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
Suppressed: java.io.IOException: Failed to open dex files from /data/app/moveitech.com-oBXiVvWbQxARq8cgEZrnpA==/base.apk because: Failure to verify dex file '/data/app/moveitech.com-oBXiVvWbQxARq8cgEZrnpA==/base.apk': Bad method handle type 7
at dalvik.system.DexFile.openDexFileNative(Native Method)
at dalvik.system.DexFile.openDexFile(DexFile.java:353)
at dalvik.system.DexFile.<init>(DexFile.java:100)
at dalvik.system.DexFile.<init>(DexFile.java:74)
at dalvik.system.DexPathList.loadDexFile(DexPathList.java:374)
at dalvik.system.DexPathList.makeDexElements(DexPathList.java:337)
at dalvik.system.DexPathList.<init>(DexPathList.java:157)
at dalvik.system.BaseDexClassLoader.<init>(BaseDexClassLoader.java:65)
at dalvik.system.PathClassLoader.<init>(PathClassLoader.java:64)
at com.android.internal.os.pathClassLoaderFactory.createClassLoader(PathClassLoaderFactory.java:43)
at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:69)
at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:36)
at android.app.LoadedApk.createOrUpdateClassLoaderLocked(LoadedApk.java:678)
at android.app.LoadedApk.getClassLoader(LoadedApk.java:711)
at android.app.LoadedApk.getResources(LoadedApk.java:944)
at android.app.ContextImpl.createAppContext(ContextImpl.java:2303)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5943)
at android.app.ActivityThread.-wrap1(UnkNown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1764)
... 6 more
解决方法
尝试重命名.java和.xml文件,不要忘记添加Manifest.xml文件。
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