14 fragment传值

2021-12-31 02:07:13

两个fragment传值

方式一

布局文件代码：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="horizontal"

    tools:context=".MainActivity" >

    <!-- 静态  必须要写ID-->

    <fragment

        android:id="@+id/fragment1"

        android:name="com.qf.day14_fragment_4.fragment.MyFragment1"

        android:layout_width="0dp"

        android:layout_height="match_parent"

        android:layout_weight="1" />

    <View

        android:layout_width="1dp"

        android:layout_height="match_parent"

        android:background="#0f0" />

    <!-- 动态 -->

    <LinearLayout

        android:id="@+id/ll_fragment_id"

        android:layout_width="0dp"

        android:layout_height="match_parent"

        android:layout_weight="1"

        android:orientation="horizontal" />

</LinearLayout>

布局文件逻辑代码：

package com.qf.day14_fragment_4;

import com.qf.day14_fragment_4.fragment.MyFragment2;

import android.os.Bundle;

import android.app.Activity;

import android.app.FragmentManager;

import android.app.FragmentTransaction;

import android.view.Menu;

public class MainActivity extends Activity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        //管理者对象

        FragmentManager manager = getFragmentManager();

        FragmentTransaction transaction =   manager.beginTransaction();

        MyFragment2 myFragment2 = new MyFragment2();

        transaction.replace(R.id.ll_fragment_id,myFragment2);

        transaction.commit();

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        getMenuInflater().inflate(R.menu.main, menu);

        return true;

    }

}

其中一个fragment逻辑代码：

package com.qf.day14_fragment_4.fragment;

import android.app.Fragment;

import android.app.FragmentManager;

import android.app.FragmentTransaction;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.ViewGroup;

import android.widget.Button;

import com.qf.day14_fragment_4.R;

public class MyFragment1 extends Fragment{

    private Button btn;

    @Override

    public View onCreateView(LayoutInflater inflater, ViewGroup container,

            Bundle savedInstanceState) {

        // TODO Auto-generated method stub

        View v = inflater.inflate(R.layout.fragment1_layout, container, false);

        btn = (Button) v.findViewById(R.id.btn);

        //点击按钮传值

        btn.setOnClickListener(new OnClickListener() {

            @Override

            public void onClick(View v) {

                // TODO Auto-generated method stub

                //管理者对象

                FragmentManager manager = getFragmentManager();

                FragmentTransaction transaction =   manager.beginTransaction();

                MyFragment2 myFragment2 = new MyFragment2();

                Bundle bundle = new Bundle();

                bundle.putString("msg", "左边Fragment向右边Fragment传值");

                myFragment2.setArguments(bundle);

                transaction.replace(R.id.ll_fragment_id, myFragment2);

                transaction.commit();

            }

        });

        return v;

    }

}

方式二前提：必须两个静态fragment

界面xml代码:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="horizontal"

    tools:context=".MainActivity" >

    <fragment

        android:id="@+id/leftfragment"

        android:name="com.qf.day14_fragment_demo5.fragment.Fragment1"

        android:layout_width="0dp"

        android:layout_height="match_parent"

        android:layout_weight="1" />

    <View

        android:layout_width="1dp"

        android:layout_height="match_parent"

        android:background="#00f" />

    <fragment

        android:id="@+id/rightfragment"

        android:name="com.qf.day14_fragment_demo5.fragment.Fragment2"

        android:layout_width="0dp"

        android:layout_height="match_parent"

        android:layout_weight="1" />

</LinearLayout>

其中核心fragment代码

package com.qf.day14_fragment_demo5.fragment;

import android.app.Fragment;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.ViewGroup;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

import com.qf.day14_fragment_demo5.R;

public class Fragment1 extends Fragment{

    private EditText etContent;

    private Button btnSend;

    @Override

    public View onCreateView(LayoutInflater inflater, ViewGroup container,

            Bundle savedInstanceState) {

        // TODO Auto-generated method stub

        View view = inflater.inflate(R.layout.layout01, container, false);

        etContent = (EditText) view.findViewById(R.id.et_content);

        btnSend = (Button) view.findViewById(R.id.btn_send);

        btnSend.setOnClickListener(new OnClickListener() {

            @Override

            public void onClick(View v) {

                // TODO Auto-generated method stub

                String msg = etContent.getText().toString().trim();

                //通过Fragment的id  获取Fragment2的对象

//              Fragment2 fragment2 = (Fragment2) getFragmentManager().findFragmentById(R.id.rightfragment);

//              fragment2.setTextValues(msg);

                //TextView tv = (TextView) getFragmentManager().findFragmentById(R.id.rightfragment).getView().findViewById(R.id.tv_show);

                TextView tv = (TextView) getActivity().findViewById(R.id.tv_show);

                tv.setText(msg);

            }

        });

        return view;

    }

}

fragment给界面传值（Activity）接口回调

界面代码

package com.qf.day14_fragment_demo3;

import com.qf.day14_fragment_demo3.callback1.CallBackValue;

import android.os.Bundle;

import android.annotation.SuppressLint;

import android.app.Activity;

import android.app.FragmentManager;

import android.app.FragmentTransaction;

import android.view.Menu;

import android.widget.TextView;

public class MainActivity extends Activity implements CallBackValue{

    private TextView tv;

    @SuppressLint("NewApi")

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        tv = (TextView) findViewById(R.id.tv);

        FragmentManager  manager = getFragmentManager();

        FragmentTransaction transaction = manager.beginTransaction();

        transaction.replace(R.id.ll_fragment_id, new MyFragment());

        transaction.commit();

    }

    //回调接口的方法

    @Override

    public void sendMessage(String msg) {

        // TODO Auto-generated method stub

        tv.setText(msg);

    }

}

接口代码

package com.qf.day14_fragment_demo3.callback1;

public interface CallBackValue {

    public void sendMessage(String msg);

}

fragment代码

package com.qf.day14_fragment_demo3;

import com.qf.day14_fragment_demo3.callback1.CallBackValue;

import android.annotation.SuppressLint;

import android.app.Activity;

import android.app.Fragment;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.ViewGroup;

import android.widget.Button;

import android.widget.EditText;

@SuppressLint("NewApi")

public class MyFragment extends Fragment{

    CallBackValue callBackValue;

    private EditText et;

    private Button btnFTA;

    /**

     * 与Activity第一次链接是调用

     */

    @Override

    public void onAttach(Activity activity) {

        // TODO Auto-generated method stub

        super.onAttach(activity);

        //Fragment归属的Activity是getActivity

        callBackValue = (CallBackValue) getActivity();

    }

    @Override

    public View onCreateView(LayoutInflater inflater, ViewGroup container,

            Bundle savedInstanceState) {

        // TODO Auto-generated method stub

        View v = inflater.inflate(R.layout.fragment_layout, container,false);

        et = (EditText) v.findViewById(R.id.et);

        btnFTA = (Button) v.findViewById(R.id.btn_FTA);

        btnFTA.setOnClickListener(new OnClickListener() {

            @Override

            public void onClick(View v) {

                // TODO Auto-generated method stub

                //将值传给Activity

                String msg = et.getText().toString().trim();

                callBackValue.sendMessage(msg);

            }

        });

        return v;

    }

}

fragment 获取界面数据(Activity)
- 可以fragment中直接getActivity 或者getContext 获取其对象
- 或者动态创建时用setAgunment 在fragment中getAgument

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