我想在我的应用程序屏幕上添加一个页脚菜单。页脚菜单将具有菜单图标，当按下左箭头或右箭头时，这些图标可以水平滚动一个菜单。根据菜单屏幕，页脚菜单应滚动到该菜单屏幕的菜单图标。
前任。：
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< menu1 | menu2 | menu3 >
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假设有 6 个菜单图标，一次可见 3 个。按向右箭头时，它应该一次滚动一个项目。
如果我的屏幕与菜单 4 相关，则必须定位 menu4。
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< menu4 | menu5 | menu6 >
-----------------------------------------
而且每个菜单项都应该是可点击的。
请告诉我，我如何以编程方式实现这一目标。
谢谢并恭祝安康
我希望这能帮到您 ：
使用below code which has Exact Solution ( Programmatically with Explanation )你的答案！
我已经完全按照您在问题中提到的那样测试了它及其给出的输出！
public class MainActivity extends Activity implements OnClickListener {
Context context;
int scrWidth, scrWidth80by3, scrWidth10;
Button btnMenu[], btnNext, btnPre;
LinearLayout llRoot, llHsMain, llMenuGroup1, llMenuGroup2;
HorizontalScrollView hScrollView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
scrWidth = dm.widthPixels;
scrWidth = (int) (0.8 * scrWidth); // Calculating 80 % Width of Screen for Horizontal Scroll View
scrWidth80by3 = (int) (scrWidth / 3); // Calulation 1/3 of Width of Horizontal Scroll View for 3 menu items
scrWidth10 = (int) (0.1 * scrWidth);// Calulation 10% Width of Screen for Previous And Next Button
context = MainActivity.this;
btnMenu = new Button[7];
llMenuGroup1 = new LinearLayout(context);
llMenuGroup2 = new LinearLayout(context);
llMenuGroup1.setLayoutParams(new LayoutParams(scrWidth,
LayoutParams.WRAP_CONTENT));
llMenuGroup2.setLayoutParams(new LayoutParams(scrWidth,
LayoutParams.WRAP_CONTENT));
for (int i = 1; i < btnMenu.length; i++) {
// Starting from int i=1 to Set Menu Item Counting from 1 like Menu 1 instead of Menu 0
btnMenu[i] = new Button(context);
btnMenu[i].setId(i);
btnMenu[i].setOnClickListener(this);
btnMenu[i].setLayoutParams(new LayoutParams(scrWidth80by3,
LayoutParams.WRAP_CONTENT));
btnMenu[i].setText("Menu" + i);
if (i <= 3) {
llMenuGroup1.addView(btnMenu[i]);
} else {
llMenuGroup2.addView(btnMenu[i]);
}
}
btnNext = new Button(context);
btnNext.setOnClickListener(this);
btnNext.setId(0);
btnPre = new Button(context);
btnPre.setOnClickListener(this);
btnPre.setId(-1);
// llRoot its Main Root Layout !
llRoot = new LinearLayout(context);
llRoot.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT));
btnNext.setLayoutParams(new LayoutParams(scrWidth10,
LayoutParams.WRAP_CONTENT));
btnNext.setText(">");
btnPre.setLayoutParams(new LayoutParams(scrWidth10,
LayoutParams.WRAP_CONTENT));
btnPre.setText("<");
// hScrollView its HorizontalScrollView !
hScrollView = new HorizontalScrollView(context);
hScrollView.setLayoutParams(new LayoutParams(scrWidth,
LayoutParams.WRAP_CONTENT));
// As HorizontalScrollView can Have one Direct Child ! so llHsMain is one Direct Child of hScrollView!
llHsMain = new LinearLayout(context);
llHsMain.setLayoutParams(new LayoutParams(scrWidth,
LayoutParams.WRAP_CONTENT));
//Adding Menu Group1 And Menu Group 2 to llHsMain as its Direct Child of hScrollView
llHsMain.addView(llMenuGroup1);
llHsMain.addView(llMenuGroup2);
//Adding Direct Child llHsMain to hScrollView
hScrollView.addView(llHsMain);
// Adding views to llRoot (its Main Root Layout) !
llRoot.addView(btnPre);
llRoot.addView(hScrollView);
llRoot.addView(btnNext);
//Displaying llRoot (its Main Root Layout) !
setContentView(llRoot);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case -1: // Previous Button Clicked
hScrollView.scrollTo(-scrWidth, 0); // see -ve sign to scroll back horizontally only scrWidth is 80% of Total Screen
break;
case 0: // Next Button Clicked
hScrollView.scrollTo(scrWidth, 0); // scrolls next horizontally only scrWidth is 80% of Total Screen
break;
case 1: // Menu Button1 Clicked
Toast.makeText(getApplicationContext(), "Menu 1 Clicked",1).show();
break;
// repeat up to 6
case 6:
Toast.makeText(getApplicationContext(), "Menu 6 Clicked",1).show();
break;
default:
break;
}
}
}
使用HorizontalScrollView并添加 LinearLayout 作为子级。在. _ _LinearLayout
测量菜单按钮 ( getWidth()) 的宽度，然后单击左键或右键滚动视图，smoothScrollBy ( width of menu button + padding ,0);或者您也可以使用scrollBy(x,y)
实际上我对 android 太陌生了，但我自己做了很多相关的事情。
您可以做的是，创建一个单独的布局文件并将其加载到您horizontal scrollview使用的layoutInflater中。
您可以定义它们对应onTouchListener的菜单。
另一种方式是，您可以定义自己的菜单（与菜单文件夹下的 main.xml 相同）并在页脚水平滚动视图布局中对其进行扩展