当Activity保存的Android Support Fragments变得越来越大并导致TransactionTooLargeException异常时,可以尝试以下解决方法:
// 在Activity中传递数据给Fragment
Bundle bundle = new Bundle();
bundle.putString("key", "value");
Fragment fragment = new MyFragment();
fragment.setArguments(bundle);
// 在Fragment中获取数据
Bundle bundle = getArguments();
String value = bundle.getString("key");
// 创建一个继承自ViewModel的类来保存数据
public class MyViewModel extends ViewModel {
private MutableLiveData data;
public MutableLiveData getData() {
if (data == null) {
data = new MutableLiveData<>();
}
return data;
}
}
// 在Fragment中获取和设置数据
MyViewModel viewModel = new ViewModelProvider(requireActivity()).get(MyViewModel.class);
viewModel.getData().observe(getViewLifecycleOwner(), new Observer() {
@Override
public void onChanged(String value) {
// 处理数据变化
}
});
viewModel.getData().setValue("value");
// 定义一个实体类来表示数据
@Entity
public class MyData {
@PrimaryKey
public int id;
public String value;
}
// 创建一个继承自RoomDatabase的类来获取数据库实例
@Database(entities = {MyData.class}, version = 1)
public abstract class AppDatabase extends RoomDatabase {
public abstract MyDataDao myDataDao();
private static AppDatabase instance;
public static synchronized AppDatabase getInstance(Context context) {
if (instance == null) {
instance = Room.databaseBuilder(context.getApplicationContext(),
AppDatabase.class, "app_database")
.build();
}
return instance;
}
}
// 在Fragment中使用数据库保存和获取数据
AppDatabase database = AppDatabase.getInstance(requireContext());
MyDataDao myDataDao = database.myDataDao();
MyData myData = new MyData();
myData.id = 1;
myData.value = "value";
myDataDao.insert(myData);
List dataList = myDataDao.getAll();
通过以上方法,可以避免Activity保存的Fragment变得过大,并且有效地处理TransactionTooLargeException异常。