android中listview学习与记录，简单文字列表、自定义列表、多布局、点击回调

深藏阁楼爱情的钟 2022-10-11 00:51 131阅读 0赞

## android中listview学习与记录，简单文字列表、自定义列表、多布局、点击回调 ##

## 简单的文字列表 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dvZGVjY191_size_16_color_FFFFFF_t_70_pic_center]

*  布局文件

<?xml version="1.0" encoding="utf-8"?>
    <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity">
    
        <ListView android:id="@+id/list" android:layout_width="match_parent" android:layout_height="match_parent"></ListView>
    
    </androidx.constraintlayout.widget.ConstraintLayout>

*  java文件

public class MainActivity extends AppCompatActivity { 
        ListView listView;
        ArrayAdapter<String> arrayAdapter;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) { 
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            listView = findViewById(R.id.list);
            String[] strings = new String[3];
            strings[0] = "浙江省";
            strings[1] = "江苏省";
            strings[2] = "山东省";
            //ArrayAdapter三个参数为context，布局文件，数据数组
            arrayAdapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_expandable_list_item_1, strings);
            listView.setAdapter(arrayAdapter);
            //点击listview中的每一行事件，获取行号position进行处理
            listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
                @Override
                public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 
                    Toast.makeText(MainActivity.this, strings[position], Toast.LENGTH_SHORT).show();
                }
            });
        }
    
    }

## 自定义布局列表 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dvZGVjY191_size_16_color_FFFFFF_t_70_pic_center 1]

*  布局文件

*  item文件

class NewItem { 
        private String id;
        private String name;
        private Boolean status;
    
        public NewItem(String id, String name, Boolean status) { 
            this.id = id;
            this.name = name;
            this.status = status;
        }
    
        public String getName() { 
            return name;
        }
    
        public void setName(String name) { 
            this.name = name;
        }
    
        public Boolean getStatus() { 
            return status;
        }
    
        public void setStatus(Boolean status) { 
            this.status = status;
        }
    
        public String getId() { 
            return id;
        }
    
        public void setId(String id) { 
            this.id = id;
        }
    }

*  item布局文件

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent">
        <CheckBox android:id="@+id/ck" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_centerVertical="true"/>
        <TextView android:id="@+id/text" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_toRightOf="@+id/ck" android:layout_centerVertical="true"/>
        <Button android:id="@+id/btn" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:text="点击" android:layout_centerVertical="true"/>
    </RelativeLayout>

*  adapter文件

class NewAdapter extends ArrayAdapter<NewItem> { 
        private int newId;//用来储存自定义的布局id
        public NewAdapter(@NonNull Context context, int resource, @NonNull List<NewItem> list) { 
            super(context, resource, list);
            this.newId = resource;
        }
    
        @NonNull
        @Override
        public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) { 
            NewItem newItem = getItem(position);
            ViewHolder viewHolder = null;
            if(viewHolder == null){ 
                viewHolder = new ViewHolder();
                convertView = LayoutInflater.from(getContext()).inflate(newId,parent,false);
                viewHolder.textView = convertView.findViewById(R.id.text);
                viewHolder.checkBox = convertView .findViewById(R.id.ck);
                viewHolder.button = convertView.findViewById(R.id.btn);
                convertView.setTag(viewHolder);
            }else{ 
                viewHolder = (ViewHolder) convertView.getTag();
            }
    
            viewHolder.textView.setText(newItem.getName());
            if(newItem.getStatus()){ 
                viewHolder.checkBox.setChecked(true);
            }else{ 
                viewHolder.checkBox.setChecked(false);
            }
            viewHolder.button.setOnClickListener(new View.OnClickListener() { 
                @Override
                public void onClick(View v) { 
                    Toast.makeText(getContext(), newItem.getName(), Toast.LENGTH_SHORT).show();
                }
            });
            return convertView;
        }
        class ViewHolder{ 
            TextView textView;
            CheckBox checkBox;
            Button button;
        }
    }

*  java文件

## 当点击事件需要操作activity中的内容时 ##

*  adapter文件

class NewAdapter extends ArrayAdapter<NewItem> { 
        private int newId;//用来储存自定义的布局id
        private BtnClickListerner btnClickListerner;
    
        /** * * @param context 上下文 * @param resource 布局id * @param list 数据 * @param btnClickListerner 点击事件接口 */
        public NewAdapter(@NonNull Context context, int resource, @NonNull List<NewItem> list,BtnClickListerner btnClickListerner) { 
            super(context, resource, list);
            this.newId = resource;
            this.btnClickListerner = btnClickListerner;
        }
        public interface BtnClickListerner{ 
            public void onBtnClick(int position);
        }
    
        @NonNull
        @Override
        public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) { 
            NewItem newItem = getItem(position);
            ViewHolder viewHolder = null;
            if(viewHolder == null){ 
                viewHolder = new ViewHolder();
                convertView = LayoutInflater.from(getContext()).inflate(newId,parent,false);
                viewHolder.textView = convertView.findViewById(R.id.text);
                viewHolder.checkBox = convertView .findViewById(R.id.ck);
                viewHolder.button = convertView.findViewById(R.id.btn);
                convertView.setTag(viewHolder);
            }else{ 
                viewHolder = (ViewHolder) convertView.getTag();
            }
    
            viewHolder.textView.setText(newItem.getName());
            if(newItem.getStatus()){ 
                viewHolder.checkBox.setChecked(true);
            }else{ 
                viewHolder.checkBox.setChecked(false);
            }
            viewHolder.button.setOnClickListener(new View.OnClickListener() { 
                @Override
                public void onClick(View v) { 
                    btnClickListerner.onBtnClick(position);
                }
            });
            return convertView;
        }
        class ViewHolder{ 
            TextView textView;
            CheckBox checkBox;
            Button button;
        }
    }

*  java文件

public class MainActivity extends AppCompatActivity { 
        ListView listView;
        NewAdapter newAdapter;
        List<NewItem> newItemList;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) { 
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            listView = findViewById(R.id.list);
            newItemList = new ArrayList<>();
            newItemList.add(new NewItem("1","浙江省",false));
            newItemList.add(new NewItem("2","江苏省",true));
            newItemList.add(new NewItem("3","山东省",false));
            newAdapter = new NewAdapter(MainActivity.this, R.layout.new_item, newItemList, new NewAdapter.BtnClickListerner() { 
                @Override
                public void onBtnClick(int position) { 
                    getItem(position);
                }
            });
    
            listView.setAdapter(newAdapter);
    
        }
    	//在这里做对应的操作
        private void getItem(int position) { 
            Toast.makeText(MainActivity.this, ""+ position, Toast.LENGTH_SHORT).show();
        }
    
    }

## 一个列表，多种布局 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dvZGVjY191_size_16_color_FFFFFF_t_70_pic_center 2]

*  布局文件

*  item布局文件

*  item1布局文件

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent">
       <ImageView android:id="@+id/img" android:layout_width="wrap_content" android:layout_height="wrap_content"/>
        <TextView android:id="@+id/text" android:layout_width="wrap_content" android:layout_height="match_parent" android:gravity="center" android:layout_centerVertical="true"/>
    
    </LinearLayout>

*  adapter文件

class NewAdapter extends ArrayAdapter<NewItem> { 
        private int newId;//用来储存自定义的布局id
        private BtnClickListerner btnClickListerner;
        private List<NewItem> newItemList;
    
        /** * * @param context 上下文 * @param list 数据 * @param btnClickListerner 点击事件接口 */
        public NewAdapter(@NonNull Context context, int resource, @NonNull List<NewItem> list,BtnClickListerner btnClickListerner) { 
            super(context, resource, list);
            this.newId = resource;
            this.btnClickListerner = btnClickListerner;
            this.newItemList = list;
        }
        public interface BtnClickListerner{ 
            public void onBtnClick(int position);
        }
    
    
        @NonNull
        @Override
        public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) { 
            NewItem newItem = getItem(position);
            ViewHolder viewHolder = null;
            ViewHolder1 viewHolder1 = null;
            if(convertView == null){ 
                if(newItem.getType() == 1){ 
                    viewHolder = new ViewHolder();
                    convertView = LayoutInflater.from(getContext()).inflate(newItem.getLayoutId(),parent,false);
                    viewHolder.textView = convertView.findViewById(R.id.text);
                    viewHolder.checkBox = convertView .findViewById(R.id.ck);
                    viewHolder.button = convertView.findViewById(R.id.btn);
                    convertView.setTag(viewHolder);
                    viewHolder.textView.setText(newItem.getName());
                    if(newItem.getStatus()){ 
                        viewHolder.checkBox.setChecked(true);
                    }else{ 
                        viewHolder.checkBox.setChecked(false);
                    }
                    viewHolder.button.setOnClickListener(new View.OnClickListener() { 
                        @Override
                        public void onClick(View v) { 
                            btnClickListerner.onBtnClick(position);
                        }
                    });
                }else{ 
                    viewHolder1 = new ViewHolder1();
                    convertView = LayoutInflater.from(getContext()).inflate(newItem.getLayoutId(),parent,false);
                    viewHolder1.imageView = convertView.findViewById(R.id.img);
                    viewHolder1.textView = convertView.findViewById(R.id.text);
                    convertView.setTag(viewHolder1);
                    viewHolder1.imageView.setImageResource(R.drawable.ic_launcher_background);
                    viewHolder1.textView.setText(newItem.getName());
                }
    
            }else{ 
                if(newItem.getType() == 1) { 
                    viewHolder = (ViewHolder) convertView.getTag();
                    viewHolder.textView.setText(newItem.getName());
                    if(newItem.getStatus()){ 
                        viewHolder.checkBox.setChecked(true);
                    }else{ 
                        viewHolder.checkBox.setChecked(false);
                    }
                    viewHolder.button.setOnClickListener(new View.OnClickListener() { 
                        @Override
                        public void onClick(View v) { 
                            btnClickListerner.onBtnClick(position);
                        }
                    });
                }else{ 
                    viewHolder1 = (ViewHolder1) convertView.getTag();
                    viewHolder1.imageView.setImageResource(R.drawable.ic_launcher_background);
                    viewHolder1.textView.setText(newItem.getName());
                }
            }
    
    
            return convertView;
        }
        class ViewHolder{ 
            TextView textView;
            CheckBox checkBox;
            Button button;
        }
        class ViewHolder1{ 
            TextView textView;
            ImageView imageView;
        }
    
        @Override
        public int getItemViewType(int position) { 
            return newItemList.get(position).getType();
        }
    }

*  java文件

public class MainActivity extends AppCompatActivity { 
        ListView listView;
        NewAdapter newAdapter;
        List<NewItem> newItemList;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) { 
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            listView = findViewById(R.id.list);
            newItemList = new ArrayList<>();
            newItemList.add(new NewItem("1","浙江省",false,1,R.layout.new_item));
            newItemList.add(new NewItem("2","江苏省",true,2,R.layout.new_item1));
            newItemList.add(new NewItem("3","山东省",false,1,R.layout.new_item));
            newAdapter = new NewAdapter(MainActivity.this, R.layout.new_item, newItemList, new NewAdapter.BtnClickListerner() { 
                @Override
                public void onBtnClick(int position) { 
                    getItem(position);
                }
            });
    
            listView.setAdapter(newAdapter);
    
        }
    
        private void getItem(int position) { 
            Toast.makeText(MainActivity.this, ""+ position, Toast.LENGTH_SHORT).show();
        }
    
    }

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dvZGVjY191_size_16_color_FFFFFF_t_70_pic_center 1]: /images/20221005/0b0ed8e9a1dc458b843b00b7131c07d6.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dvZGVjY191_size_16_color_FFFFFF_t_70_pic_center 2]: /images/20221005/9b6fd7161f294e3f8762e8189aeef058.png