Android中复制及粘贴功能

Posted 2022-11-30 骑鲸鱼的企鹅

我们开发中，经常会用到复制粘贴的功能。算是一个小功能，也比较简单。我把项目里用的，抽离出来，附带上自定义了一个简单的菜单弹窗。

来一张gif效果图：

直接上代码，文前后有Demo

正文类：

列表内容

/**
 * Created by zhenqi
 */
public class MainActivity extends AppCompatActivity 

    @Override
    protected void onCreate(Bundle savedInstanceState) 
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final TextView textView = (TextView) findViewById(R.id.textView);
        final TextView textView2 = (TextView) findViewById(R.id.textView2);
        EditText editText = (EditText) findViewById(R.id.editText);

        //第一个文字的长按监听
        textView.setOnLongClickListener(new View.OnLongClickListener() 
            @Override
            public boolean onLongClick(View view) 
                showMenu(textView);
                return true;
            
        );
        //第二个文字的长按监听
        textView2.setOnLongClickListener(new View.OnLongClickListener() 
            @Override
            public boolean onLongClick(View view) 
                showMenu(textView2);
                return true;
            
        );

    

    public void showMenu(final TextView textView) 
        //可以按照需求随意添加 中心显示的Dialog
        CenterMenuDialog centerMenuDialog = new CenterMenuDialog(MainActivity.this);
        //第一个选择条目
        Menu copyMenu = new Menu.Builder().setCaption("复制").setMenuCommand(new MenuCommand() 
            @Override
            public void onClick() 
                ClipboardManager myClipboard;
                myClipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
                myClipboard.setPrimaryClip(ClipData.newPlainText("content", textView.getText()));
                Toast.makeText(MainActivity.this, "内容已经复制", Toast.LENGTH_SHORT).show();
            
        ).build();
        centerMenuDialog.addMenu(copyMenu);

        //第二个选择条目
        Menu themeMenu = new Menu.Builder().setCaption("取消").setMenuCommand(new MenuCommand() 
            @Override
            public void onClick() 
                Toast.makeText(MainActivity.this, "已经取消", Toast.LENGTH_SHORT).show();
            
        ).build();
        centerMenuDialog.addMenu(themeMenu);

        //显示Dialog
        centerMenuDialog.show();
    

---

弹窗类：

/**
 * Created by zhenqi
 * 中心弹窗类
 */

public class CenterMenuDialog 
    AlertDialog.Builder builder;

    List<Menu> menuList=new ArrayList<>();

    public void addMenu(Menu menu) 
        menuList.add(menu);
    
    public CenterMenuDialog(Context context)
        builder = new AlertDialog.Builder(context);
        builder.setCancelable(true);
    

    public void show()
        String arr[]=new String[menuList.size()];
        for (int i = 0; i < menuList.size(); i++) 
            arr[i]=menuList.get(i).caption;
        
        builder.setItems(arr, new DialogInterface.OnClickListener() 
            @Override
            public void onClick(DialogInterface dialogInterface, int i) 
                Menu menu=menuList.get(i);
                if(menu.menuCommand!=null)
                    menu.menuCommand.onClick();
                
            
        );
        builder.create().show();
    

---

菜单类：

/**
 * Created by zhenqi
 * 自定义菜单类
 */

public class Menu 
    public int resourceId;
    public String caption;
    public MenuCommand menuCommand;

    public static class Builder 
        int resourceId;
        String caption;
        MenuCommand menuCommand;
        public Builder setResourceId(int resourceId)
            this.resourceId=resourceId;
            return this;
        
        public Builder setCaption(String caption)
            this.caption=caption;
            return this;
        
        public Builder setMenuCommand(MenuCommand menuCommand)
            this.menuCommand=menuCommand;
            return this;
        
        public Menu build()
            Menu menu=new Menu();
            menu.resourceId=resourceId;
            menu.menuCommand=menuCommand;
            menu.caption=caption;
            return menu;
        
    

接口

/**
 * Created by zhenqi
 */

public interface MenuCommand 
    void onClick();

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