[4] List View, Custom Button

1. List View

Sample Source

package com.ssh.user.ex_1202; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.ListView; import java.util.ArrayList; public class ListViewActivity extends AppCompatActivity { EditText et; Button addBtn; ListView myList; MyAdapter adapter; ArrayList<String> arr; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_list_view); et = (EditText)findViewById(R.id.et); addBtn = (Button)findViewById(R.id.addBtn); myList = (ListView)findViewById(R.id.myList); arr = new ArrayList<>(); // ListView 항목을 구현하기 위한 Adapter 생성 adapter = new MyAdapter(ListViewActivity.this, R.layout.list_form, arr, myList); // 생성된 Adapter를 ListView에 탑재 ( getView 호출) myList.setAdapter(adapter); addBtn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { arr.add(et.getText().toString()); if( myList != null ) { // Adapter 갱신 메소드 adapter.notifyDataSetChanged(); } } }); } }

package com.ssh.user.ex_1202; import android.content.Context; import android.support.annotation.NonNull; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; import java.util.ArrayList; /** * Created by USER on 2016-12-02. */ public class MyAdapter extends ArrayAdapter<String>{ Context context; ArrayList<String> arr; int resource; public MyAdapter(Context context, int resource, ArrayList<String> arr, ListView list) { super(context, resource, arr); this.resource = resource; this.context = context; this.arr = arr; list.setOnItemClickListener(click); } AdapterView.OnItemClickListener click = new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { Toast.makeText(getContext(), arr.get(i), Toast.LENGTH_SHORT).show(); } }; @NonNull @Override // arr의 length 회수만큼 position이 증가하면서 호출됨. public View getView(int position, View convertView, ViewGroup parent) { LayoutInflater linf = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView = linf.inflate(resource, null); String str = arr.get(position); TextView list_form_txt = (TextView)convertView.findViewById(R.id.list_form_txt); TextView list_form_txt_s = (TextView)convertView.findViewById(R.id.list_form_txt_s); list_form_txt.setText(str); list_form_txt_s.setText(""+position); return convertView; } }

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_list_view" 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" tools:context="com.ssh.user.ex_1202.ListViewActivity" android:orientation="vertical"> <EditText android:id="@+id/et" android:layout_width="match_parent" android:layout_height="wrap_content" android:inputType="text"/> <ListView android:id="@+id/myList" android:overScrollMode="never" android:scrollbars="none" android:transcriptMode="alwaysScroll" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_weight="1"/> <Button android:id="@+id/addBtn" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="ADD"/> </LinearLayout>

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="match_parent" android:padding="10dp"> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@mipmap/ic_launcher"/> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical"> <TextView android:id="@+id/list_form_txt_s" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="txt"/> <TextView android:id="@+id/list_form_txt" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_margin="7dp" android:text="line2" android:textSize="20dp" android:textStyle="bold"/> </LinearLayout> </LinearLayout>

2. Custom Button

Sample Source

package com.ssh.user.ex_1202; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; import android.widget.LinearLayout; import android.widget.Toast; public class CustomActivity extends AppCompatActivity { LinearLayout activity_custom; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_custom); activity_custom = (LinearLayout)findViewById(R.id.activity_custom); for(int i = 0; i < 5 ; i++) { Button btn = new Button(CustomActivity.this); btn.setId(i); btn.setText("btn : "+i); btn.setWidth(LinearLayout.LayoutParams.MATCH_PARENT); btn.setHeight(LinearLayout.LayoutParams.WRAP_CONTENT); btn.setOnClickListener(click); activity_custom.addView(btn); } } View.OnClickListener click = new View.OnClickListener() { @Override public void onClick(View view) { if(((Button)view).getId()%2 == 0) Toast.makeText(getApplicationContext(), ((Button)view).getText().toString(), Toast.LENGTH_SHORT).show(); } }; }

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_custom" 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" tools:context="com.ssh.user.ex_1202.CustomActivity" android:orientation="vertical"> </LinearLayout>