我把我的应用迁移到了Androidx后,在调试应用时遇到了以下警告:
拒绝重新初始化之前失败的类java.lang.Class: java.lang.NoClassDefFoundError: 无法解析Landroid/view/View$OnUnhandledKeyEventListener; void androidx.core.view.ViewCompat.setOnApplyWindowInsetsListener(android.view.View, androidx.core.view.OnApplyWindowInsetsListener) (ViewCompat.java:2421)
尽管这只是个警告,但我没找到解决方法。
我唯一发现的问题是和AppCompatActivity相关的 - 我在每个活动中都在使用它:
public class MainActivity extends AppCompatActivity
当我将 AppCompatActivity 替换为 Activity 时,警告消失了。
但我认为这不是一个好的解决方案,因为需要向后兼容。我的应用程序的minSdkVersion是23,但有人能确认我可以用 Activity 替换 AppCompatActivity 吗?
我认为未来的功能不会向后兼容...
否则,我认为没有其他简单的解决方法。
以下是 MainActivity 中代码的部分内容:
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.ImageView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import androidx.preference.PreferenceManager;
import com.google.firebase.messaging.FirebaseMessaging;
import java.util.Locale;
import java.util.Set;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Locale locale = new Locale(lng);
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config,
getBaseContext().getResources().getDisplayMetrics());
new DatabaseHelper(this);
this.setContentView(R.layout.activity_main);
ImageView language = findViewById(R.id.lang);
ImageView logo = findViewById(R.id.logo);
if (lng.equals("sk")) {
language.setImageResource(R.drawable.en);
logo.setImageResource(R.drawable.logo);
}
else { language.setImageResource(R.drawable.sk);
logo.setImageResource(R.drawable.logoen);
}
ImageView notify = findViewById(R.id.settings);
if (readState()) {
notify.setImageResource(R.drawable.notifyon); }
else {notify.setImageResource(R.drawable.notifyoff);}
}
public void ClickSearch(View v)
{
Intent intent = new Intent(MainActivity.this, Search.class);
startActivity(intent);
}
}
另一个部分的警告也指向我代码中的这一行:this.setContentView(R.layout.activity_main);
我的依赖关系:
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation "androidx.preference:preference:1.1.0"
implementation 'androidx.legacy:legacy-support-v4:1.0.0'
implementation 'com.google.android.gms:play-services-maps:17.0.0'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
testImplementation 'junit:junit:4.12'
implementation 'com.google.firebase:firebase-core:17.2.1'
implementation 'com.google.firebase:firebase-analytics:17.2.1'
implementation 'com.crashlytics.sdk.android:crashlytics:2.10.1'
implementation 'com.google.firebase:firebase-messaging:20.0.0'
androidTestImplementation 'androidx.test:runner:1.2.0'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
implementation 'com.squareup.picasso:picasso:2.5.2'
implementation 'com.google.android.material:material:1.0.0'
}
apply plugin: 'com.google.gms.google-services'