Fragment可以向Activity传递数据也可以Activity向Fragment的传输局Fragment也可以向Fragment的传递数
Activity向Fragment传递数据先创建一个FragmentActivity与布局(可以一键创建)把Fragment布局写好然后在FragmentActivity里面将其控件找到找到布局文件然后用Bundle准备接受Activity发送过来的数据用getArguments()接收对其进行判断若不为null啧将内容get()出来并赋值再Fragment的空间里面
以下为FragmentActivity的代码:—>
package com.example.handerfragment;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
/**
A simple {@link Fragment} subclass.
*/
public class BlankFragment extends Fragment {
private TextView textView;
public BlankFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
View inflate = inflater.inflate(R.layout.fragment_blank, container, false);
//1 拿控件
textView = inflate.findViewById(R.id.context_tv_id);
//2 给控件赋值
Bundle arguments = getArguments();
if(arguments != null){ //第一次启动一定为null,所以要判断一下
String key = arguments.getString(“key”);
textView.setText(key);
}
return inflate;
}
}
主Activity里面将布局文件写好在主Activity里面实现动态创建Fragment(注:FragmentManager以及FragmentTransaction设置成为全局)之后使用Bundle传递数据bundle.putString(,);
第一个参数为键值,第二个为数据
以下为主Activity代码:—>
package com.example.handerfragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
public class MainActivity extends AppCompatActivity {
private FragmentManager fragmentManager;
private FragmentTransaction fragmentTransaction;
private EditText editText;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
editText = findViewById(R.id.et_id);
//1,在这里动态添加一个fragment
fragmentManager = getSupportFragmentManager();
fragmentTransaction = fragmentManager.beginTransaction();
//注意这个布局文件,是R.layout.activity_a_2_f xml文件里的线性布局
fragmentTransaction.add(R.id.linear_layout_id,new BlankFragment());
fragmentTransaction.commit();
}
public void click(View view) {
String string = editText.getText().toString().trim();
//创建fragment对象
BlankFragment showContextFragment = new BlankFragment();
//创建bundle
Bundle bundle = new Bundle();
bundle.putString("key",string);
//给fragment对象赋值
showContextFragment.setArguments(bundle);
//动态修改fragment
fragmentManager = getSupportFragmentManager();
fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.linear_layout_id,showContextFragment);
fragmentTransaction.commit();
editText.setText("");
editText.setHint("请输入信息:");
}
}
使用Fragment给Activity传递数据并赋值仍是需要将所有布局文件写好在Fragment和Activity里面找到并创建但是不再需要在主Activity创建Fragment而是需要在你所创建的Fragment的Activty里面写入一个接口并将接口全局创建然后在onCreate或者onAttach将其强转实例化getActivity();(最好在onAttach)里面写入然后在主类继承接口将方法接口里面方法重写入setText()即可
以下为FragmentActivity的代码:—>
package com.example.handerfragment;
import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
/**
A simple {@link Fragment} subclass.
*/
public class BlankFragment2 extends Fragment {
private EditText editText;
private Button button;
private MyListener listener;
public BlankFragment2() {
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
listener=(MyListener)getActivity();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
View inflate = inflater.inflate(R.layout.fragment_blank_fragment2, container, false);
button=inflate.findViewById(R.id.button1);
editText=inflate.findViewById(R.id.editText);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String trim = editText.getText().toString().trim();
if(trim!=null){
listener.sendMessage(trim);
}else{
listener.sendMessage("您未输入任何内容!");
}
editText.setText("");
editText.setHint("请输入您所要输入的信息");
}
});
return inflate;
}
public interface MyListener{
void sendMessage(String message);
}
}
主Activity只需要完成赋值即可
以下为主Activity代码:—>
package com.example.handerfragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
public class Main2Activity extends AppCompatActivity implements BlankFragment2.MyListener {
private FragmentManager fragmentManager;
private FragmentTransaction fragmentTransaction;
private TextView textView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
textView=findViewById(R.id.textView);
}
@Override
public void sendMessage(String message) {
textView.setText(message);
}
}
Fragment传递Fragment数据=-=…在主类布局静态用name静态创建即可随后创建两个Fragment布局利用主Activtiy来进行查找对方控件进行赋值即可=-=
两个Fragment代码: package com.example.handerfragment;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
/**
A simple {@link Fragment} subclass.
*/
public class LeftFragment extends Fragment {
private EditText editText;
private Button button;
private TextView textView;
public LeftFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View inflate = inflater.inflate(R.layout.fragment_left, container, false);
editText=inflate.findViewById(R.id.editText2);
button=inflate.findViewById(R.id.button2);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String string = editText.getText().toString();
textView= getActivity().findViewById(R.id.textView2);
textView.setText(string);
editText.setText("");
editText.setHint(“请输入您所要输入的信息”);
}
});
return inflate;
}
}
package com.example.handerfragment;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
A simple {@link Fragment} subclass.
*/
public class RightFragment extends Fragment {
public RightFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_right, container, false);
}
}