Android Studio —— fragment

Android Studio —— fragment"/>

Android Studio —— fragment

效果

源码

CSDN源码下载

代码

     MainActivity.java

package com.example.application;import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.FragmentManager;import android.os.Bundle;
import android.view.View;
import android.widget.Adapter;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;public class MainActivity extends AppCompatActivity {String name[] = new String[]{"人工智能","大数据","区块链","物联网","云计算","VR"};String cont[] = new String[]{"人工智能人工智能人工智能人工智能人工智能人工智能人工智能人工智能人工智能人工智能.","大数据大数据大数据大数据大数据大数据大数据大数据大数据大数据.","区块链区块链区块链区块链区块链区块链区块链区块链区块链区块链.","物联网物联网物联网物联网物联网物联网物联网物联网物联网物联网.","云计算云计算云计算云计算云计算云计算云计算云计算云计算云计算.","VRVRVRVRVRVRVRVRVRVR"};@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);FragmentManager fragmentManager = getSupportFragmentManager();MyFragment myFragment = (MyFragment) fragmentManager.findFragmentById(R.id.myfragment);TextView TV = myFragment.getView().findViewById(R.id.TV);TV.setText(cont[0]);ArrayAdapter<String> nameAdapter = new ArrayAdapter<String>(MainActivity.this,R.layout.item,name);ListView listview = findViewById(R.id.listview);listview.setAdapter(nameAdapter);listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {TV.setText(cont[i]);}});}
}

 
     activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android=""xmlns:app=""xmlns:tools=""android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".MainActivity"><LinearLayoutandroid:layout_width="0dp"android:layout_height="match_parent"android:layout_weight="1"android:orientation="vertical"><TextViewandroid:id="@+id/textView"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="TextView" /><ListViewandroid:id="@+id/listview"android:layout_width="match_parent"android:layout_height="match_parent"android:layout_marginTop="20dp"android:layout_weight="1" /></LinearLayout><fragmentandroid:id="@+id/myfragment"android:name="com.example.application.MyFragment"android:layout_width="0dp"android:layout_height="match_parent"android:layout_weight="3" /></LinearLayout>

 
     MyFragment.java

package com.example.application;import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;public class MyFragment extends Fragment {@Nullable@Overridepublic View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {View view = inflater.inflate(R.layout.myfragment,container,false);Button buttonSEND = view.findViewById(R.id.buttonSEND);buttonSEND.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View view) {TextView textView = getActivity().findViewById(R.id.textView);textView.setText("来自Fragment:" + System.currentTimeMillis());}});return view;}
}

 
     myfragment.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android=""android:layout_width="match_parent"android:layout_height="match_parent"android:background="#D2ED5A"android:gravity="center"android:orientation="vertical"><TextViewandroid:id="@+id/TV"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_weight="0"android:text="..." /><Buttonandroid:id="@+id/buttonSEND"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginTop="20dp"android:layout_weight="0"android:text="发送" />
</LinearLayout>

 
     item.xml

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android=""android:layout_width="match_parent"android:layout_height="40dp"android:gravity="center"android:text="123"android:textSize="16sp">
</TextView>

关注

笔者 - jxd

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