片段翻译和手机定位错误

时间:2019-02-18 21:22:23

标签: java android

电话的方向和片段翻译错误。

我有一个活动和一些片段。第一个片段立即带有徽标,经过活动,然后3秒钟后,第二个片段翻译过来。问题是,如果我改变手机的方向,第一个片段会以与启动应用程序相同的延迟和相同的行为重新出现。

MainActivity:

package com.mainpackage.pinbook;

import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

import com.mainpackage.pinbook.com.autentification.LoginFragment;


public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
    fragmentTransaction.replace(R.id.main_container , new MainScreen());
    fragmentTransaction.commit();
}
}

主屏幕:

package com.mainpackage.pinbook;

import android.os.Bundle;
import android.os.Handler;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;


import com.mainpackage.pinbook.com.autentification.*;

public class MainScreen extends Fragment{
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    return inflater.inflate(R.layout.main_screen , container , false);
}

private TextView entry_text;
public static final String TAG = MainScreen.class.getSimpleName();

@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    new Handler().postDelayed(new Runnable() {
        @Override
        public void run() {
            slide();
        }
    }, 3000);

}

private void slide(){
    FragmentTransaction fragmentTransaction = getActivity().getSupportFragmentManager().beginTransaction();
    fragmentTransaction.setCustomAnimations(0,R.anim.slide_in_left);
    fragmentTransaction.replace(R.id.main_container , new LoginFragment());
    fragmentTransaction.commit();
}

@Override
public void onStop() {
    super.onStop();
    ((AppCompatActivity)getActivity()).getSupportActionBar().show();
}

@Override
public void onResume() {
    super.onResume();
    ((AppCompatActivity)getActivity()).getSupportActionBar().hide();
}
}

第二个片段可以为空白。

我想要的只是在更改手机方向时保留在当前片段上

1 个答案:

答案 0 :(得分:1)

设备旋转时,props被再次调用。 像这样将片段交易包裹在onCreate()中:

onCreate()

这将防止旋转时将第一个片段放回顶部。