14 fragment传值

• 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