11 2021 档案
摘要:add() FragmentManager manager = getSupportFragmentManager(); FragmentTransaction transaction = manager.beginTransaction(); transaction.add(R.id.fragme
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摘要:Activity类中的finish()、onDestory()和System.exit(0) 三者的区别: finish是Activity的类,仅仅针对Activity,当调用finish()时,只是将活动推向后台,并没有立即释放内存,活动的资源并没有被清理;当调用System.exit(0)时,杀
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摘要:package com.example.myapplication; import androidx.appcompat.app.AppCompatActivity; import android.content.SharedPreferences; import android.os.Bundle
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摘要:Java package com.example.myapplication; import androidx.appcompat.app.AppCompatActivity; import android.content.Context; import android.os.Bundle; imp
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摘要:Java Furit.java package com.example.myapplication; public class Fruit { private int imageId; private String name; public Fruit(String name, int imageI
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摘要:Java Fruit.java package com.example.myapplication; public class Fruit { private int imageId; private String name; public Fruit(String name, int imageI
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