如何将一些数据转移到另一个片段同样,它是做了额外的意图?
当前回答
如果你使用图表在片段之间导航,你可以这样做:
Bundle bundle = new Bundle();
bundle.putSerializable(KEY, yourObject);
Navigation.findNavController(view).navigate(R.id.fragment, bundle);
片段B:
Bundle bundle = getArguments();
object = (Object) bundle.getSerializable(KEY);
当然你的对象必须实现Serializable
其他回答
使用片段传递数据的完整代码
Fragment fragment = new Fragment(); // replace your custom fragment class
Bundle bundle = new Bundle();
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
bundle.putString("key","value"); // use as per your need
fragment.setArguments(bundle);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.replace(viewID,fragment);
fragmentTransaction.commit();
在自定义片段类中
Bundle mBundle = new Bundle();
mBundle = getArguments();
mBundle.getString(key); // key must be same which was given in first fragment
使用Bundle。这里有一个例子:
Fragment fragment = new Fragment();
Bundle bundle = new Bundle();
bundle.putInt(key, value);
fragment.setArguments(bundle);
Bundle为许多数据类型提供了方法。看到这个
然后在你的片段,检索数据(例如在onCreate()方法):
Bundle bundle = this.getArguments();
if (bundle != null) {
int myInt = bundle.getInt(key, defaultValue);
}
来自活动课:
使用bundle参数将数据发送到片段并加载片段
Fragment fragment = new myFragment();
Bundle bundle = new Bundle();
bundle.putString("pName", personName);
bundle.putString("pEmail", personEmail);
bundle.putString("pId", personId);
fragment.setArguments(bundle);
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
fragment).commit();
从myFragment类:
从bundle中获取参数并将它们设置为xml
Bundle arguments = getArguments();
String personName = arguments.getString("pName");
String personEmail = arguments.getString("pEmail");
String personId = arguments.getString("pId");
nameTV = v.findViewById(R.id.name);
emailTV = v.findViewById(R.id.email);
idTV = v.findViewById(R.id.id);
nameTV.setText("Name: "+ personName);
emailTV.setText("Email: "+ personEmail);
idTV.setText("ID: "+ personId);
First Fragment Sending String To Next Fragment
public class MainActivity extends AppCompatActivity {
private Button Add;
private EditText edt;
FragmentManager fragmentManager;
FragClass1 fragClass1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Add= (Button) findViewById(R.id.BtnNext);
edt= (EditText) findViewById(R.id.editText);
Add.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
fragClass1=new FragClass1();
Bundle bundle=new Bundle();
fragmentManager=getSupportFragmentManager();
fragClass1.setArguments(bundle);
bundle.putString("hello",edt.getText().toString());
FragmentTransaction fragmentTransaction=fragmentManager.beginTransaction();
fragmentTransaction.add(R.id.activity_main,fragClass1,"");
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
}
});
}
}
Next Fragment to fetch the string.
public class FragClass1 extends Fragment {
EditText showFrag1;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.lay_frag1,null);
showFrag1= (EditText) view.findViewById(R.id.edtText);
Bundle bundle=getArguments();
String a=getArguments().getString("hello");//Use This or The Below Commented Code
showFrag1.setText(a);
//showFrag1.setText(String.valueOf(bundle.getString("hello")));
return view;
}
}
I used Frame Layout easy to use.
Don't Forget to Add Background color or else fragment will overlap.
This is for First Fragment.
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:background="@color/colorPrimary"
tools:context="com.example.sumedh.fragmentpractice1.MainActivity">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/editText" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:id="@+id/BtnNext"/>
</FrameLayout>
Xml for Next Fragment.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:background="@color/colorAccent"
android:layout_height="match_parent">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/edtText"/>
</LinearLayout>
这是你使用bundle的方式:
Bundle b = new Bundle();
b.putInt("id", id);
Fragment frag= new Fragment();
frag.setArguments(b);
从bundle中检索值:
bundle = getArguments();
if (bundle != null) {
id = bundle.getInt("id");
}
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