本文实例讲述了Android开发实现SubMenu选项菜单和子菜单。分享给大家供大家参考,具体如下:
简介:
SubMenu:代表一个子菜单,包含1~N个MenuItem
实现效果:
具体实现方法:
主活动 MainActivity:
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public class MainActivity extends AppCompatActivity { //定义 “字体大小” 菜单项的标识 final int FONT_10 = 0x111 ; final int FONT_12 = 0x112 ; final int FONT_14 = 0x113 ; final int FONT_16 = 0x114 ; final int FONT_18 = 0x115 ; //定义“普通菜单项” 的标识 final int PLAIN_ITEM = 0x11b ; //定义“字体颜色”的菜单项的标识 final int FONT_RED = 0x116 ; final int FONT_BLUE = 0x117 ; final int FONT_GREEN = 0x118 ; private EditText editText; @Override protected void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.activity_main); editText = (EditText) findViewById(R.id.txt); } //当用户点击按钮键时 触发该方法 @Override public boolean onCreateOptionsMenu(Menu menu) { //添加字体大小的子菜单 SubMenu fontMenu = menu.addSubMenu( "字体大小" ); //设置菜单图标 fontMenu.setIcon(R.drawable.seek02); //设置菜单头的图标 fontMenu.setHeaderIcon(R.drawable.seek03); //设置菜单头的标题 fontMenu.setHeaderTitle( "选择字体大小" ); fontMenu.add( 0 , FONT_10, 0 , "10号字体" ); fontMenu.add( 0 , FONT_12, 0 , "12号字体" ); fontMenu.add( 0 , FONT_14, 0 , "14号字体" ); fontMenu.add( 0 , FONT_16, 0 , "16号字体" ); fontMenu.add( 0 , FONT_18, 0 , "18号字体" ); //向Menu中添加普通菜单项 menu.add( 0 , PLAIN_ITEM, 0 , "普通菜单选项" ); //向Menu中添加"字体颜色"的子菜单 SubMenu colorMenu = menu.addSubMenu( "字体颜色" ); colorMenu.setIcon(R.drawable.find1); //设置菜单头图标 colorMenu.setHeaderIcon(R.drawable.find); //设置菜单头标题 colorMenu.setHeaderTitle( "选择文字颜色" ); colorMenu.add( 0 , FONT_RED, 0 , "红色" ); colorMenu.add( 0 , FONT_GREEN, 0 , "绿色" ); colorMenu.add( 0 , FONT_BLUE, 0 , "蓝色" ); return super .onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { //判断单机的是那个菜单项 switch (item.getItemId()){ case FONT_10: editText.setTextSize( 10 * 2 ); break ; case FONT_12: editText.setTextSize( 12 * 2 ); break ; case FONT_14: editText.setTextSize( 14 * 2 ); break ; case FONT_16: editText.setTextSize( 16 * 2 ); break ; case FONT_18: editText.setTextSize( 18 * 2 ); break ; case FONT_RED: editText.setTextColor(Color.RED); break ; case FONT_GREEN: editText.setTextColor(Color.GREEN); break ; case FONT_BLUE: editText.setTextColor(Color.BLUE); break ; case PLAIN_ITEM: Toast.makeText(MainActivity. this , "you click menu" ,Toast.LENGTH_SHORT).show(); break ; } return true ; } } |
布局中添加 EditText:
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<? xml version = "1.0" encoding = "utf-8" ?> < android.support.constraint.ConstraintLayout xmlns:android = "http://schemas.android.com/apk/res/android" xmlns:tools = "http://schemas.android.com/tools" xmlns:app = "http://schemas.android.com/apk/res-auto" android:layout_width = "match_parent" android:layout_height = "match_parent" tools:context = ".MainActivity" > < EditText android:id = "@+id/txt" android:layout_width = "match_parent" android:layout_height = "wrap_content" android:hint = "用于测试的内容" /> </ android.support.constraint.ConstraintLayout > |
希望本文所述对大家Android程序设计有所帮助。
原文链接:https://blog.csdn.net/qq_43377749/article/details/85099267