在ImageView上覆盖具有不透明度的视图
目前我有一个布局xml文件，我绑定了很多视图。我在这里遇到了一个问题。问题是我无法在（心脏图像）Imageview 上叠加视图。在布局 xml 文件中，我可以设置，但我无法在 imageview 上叠加视图。请帮我计算一下。我想要黑色Heart Imageview上的不透明度视图。
这是xmlsource代码。我用*标记了重要的代码。
<LinearLayout
android:id="@+id/listlayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:gravity="top"
android:orientation="vertical" >
<ListView
android:id="@+id/datalist"
style="@style/listview"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ListView>
</LinearLayout>
<RelativeLayout
android:id="@+id/layout2"
android:layout_width="wrap_content"
android:layout_height="80dp"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:background="#F18EA4"
android:gravity="bottom" >
<TextView
android:id="@+id/income_entry_container"
style="@style/LightYellow"
android:layout_width="70dp"
android:layout_height="20dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:gravity="left|center"
android:text="@string/confirm_income" />
<TextView
android:id="@+id/expense"
style="@style/LightYellow"
android:layout_width="70dp"
android:layout_height="20dp"
android:layout_alignParentLeft="true"
android:layout_below="@+id/income_entry_container"
android:gravity="left|center"
android:text="@string/confirm_expense" />
<TextView
android:id="@+id/confirm_income_item_TextView"
style="@style/LightYellow"
android:layout_width="70dp"
android:layout_height="20dp"
android:layout_above="@+id/expense"
android:layout_toRightOf="@+id/income_entry_container"
android:gravity="right|center"
android:text="@string/confrim_income_item" />
<TextView
android:id="@+id/confirm_expense_item_TextView"
style="@style/LightYellow"
android:layout_width="70dp"
android:layout_height="20dp"
android:layout_alignLeft="@+id/confirm_income_item_TextView"
android:layout_below="@+id/confirm_income_item_TextView"
android:gravity="right|center"
android:text="@string/confirm_expense_item" />
<TextView
android:id="@+id/confirm_income_amount_TextView"
style="@style/LightYellow"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:gravity="right|center"
android:text="@string/confirm_income_amount" />
<TextView
android:id="@+id/confrim_expnese_amount_TextView"
style="@style/LightYellow"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="@+id/confirm_income_item_TextView"
android:gravity="right|center"
android:text="@string/confirm_expnese_amount" />
<ImageButton
android:id="@+id/up_down_imageButton"
style="@style/UpDownButtonSelector"
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_marginLeft="170dp"
android:layout_marginTop="10dp"
android:contentDescription="@string/up_down_imageButton" />
<TextView
android:id="@+id/save_percentage"
style="@style/LightYellow"
android:layout_width="wrap_content"
android:layout_height="20dp"
android:layout_below="@+id/balance_amount_TextView"
android:layout_toRightOf="@+id/heart_ImageView"
android:gravity="left|center"
android:textSize="14sp" />
<TextView
android:id="@+id/lbl_balance"
style="@style/LightYellow"
android:layout_width="wrap_content"
android:layout_height="20dp"
android:layout_alignParentLeft="true"
android:layout_below="@+id/confrim_expnese_amount_TextView"
android:gravity="left|center"
android:text="@string/usable_amount"
android:textSize="12sp" />
**<ImageView
android:id="@+id/heart_ImageView"
style="@style/LightYellow"
android:layout_width="260dp"
android:layout_height="20dp"
android:layout_alignParentLeft="true"
android:layout_below="@+id/lbl_balance"
android:contentDescription="@string/heart_content" />**
<TextView
android:id="@+id/balance_amount_TextView"
style="@style/LightYellow"
android:layout_width="wrap_content"
android:layout_height="20dp"
android:layout_alignBaseline="@+id/lbl_balance_amount"
android:layout_alignBottom="@+id/lbl_balance_amount"
android:layout_alignParentRight="true"
android:layout_toRightOf="@+id/lbl_balance_amount"
android:gravity="right|center"
android:text="@string/balance_amount"
android:textSize="14sp" />
<TextView
android:id="@+id/lbl_balance_amount"
style="@style/LightYellow"
android:layout_width="wrap_content"
android:layout_height="20dp"
android:layout_below="@+id/confrim_expnese_amount_TextView"
android:layout_marginLeft="10dp"
android:layout_toRightOf="@+id/lbl_balance"
android:gravity="right|center"
android:text="@string/lbl_balance_amount"
android:textSize="14sp" />
**<View
android:id="@+id/overlay"
android:layout_width="260dp"
android:layout_height="20dp"
android:layout_below="@+id/lbl_balance" />**
</RelativeLayout>
</RelativeLayout>
这是源代码。我用*。
标记了重要的代码 @Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
v = inflater.inflate(R.layout.fragment_buta_confirm, container, false);
listRelativeLayout = (RelativeLayout) v
.findViewById(R.id.fragment_list);
int top = ((ButaColleTabBarActivity) getActivity())
.getActionBarHeight() + 2;
listRelativeLayout.setPadding(0, top, 0, 120);
listLinearLayout = (LinearLayout) v.findViewById(R.id.listlayout);
listLinearLayout.setPadding(0, 0, 0, 160);
ie_adapter = new Income_Expense_Adapter(getActivity(),
android.R.layout.simple_list_item_1, butaColleList);
view = (ListView) v.findViewById(R.id.datalist);
view.setAdapter(ie_adapter);
view.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
ButaColle butaColle = butaColleList.get(position);
FragmentManager fragmentManager = getFragmentManager();
ButaColleDetailIncomeExpenseFragment butaDetail = ButaColleDetailIncomeExpenseFragment
.newInstance(butaColle);
FragmentTransaction fragmentTransaction = fragmentManager
.beginTransaction();
fragmentTransaction.replace(R.id.realTabContent, butaDetail);
fragmentTransaction.addToBackStack("SearchFragment");
fragmentTransaction.commit();
}
});
view.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
view.setMultiChoiceModeListener(new MultiChoiceModeListener() {
@Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
return false;
}
@Override
public void onDestroyActionMode(ActionMode mode) {
ie_adapter.removeSelection();
}
@Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
MenuInflater inflater = mode.getMenuInflater();
inflater.inflate(R.menu.menu_delete_context, menu);
return true;
}
@Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_item_delete_data:
SparseBooleanArray selected = ie_adapter.getSelectedIds();
for (int i = (selected.size() - 1); i >= 0; i--) {
if (selected.valueAt(i)) {
ButaColle butaitem = ie_adapter.getItem(selected
.keyAt(i));
dbhelper.deleteHistoryRecords(butaitem);
ie_adapter.remove(butaitem);
}
}
mode.finish();
return true;
default:
return false;
}
}
@Override
public void onItemCheckedStateChanged(ActionMode mode,
int position, long id, boolean checked) {
final int checkedCount = view.getCheckedItemCount();
mode.setTitle(checkedCount + " Selected");
ie_adapter.toggleSelection(position);
}
});
updownImageButton = (ImageButton) v
.findViewById(R.id.up_down_imageButton);
updownImageButton.setBackgroundResource(R.drawable.close01);
updownImageButton.setTag(R.drawable.close01);
updownImageButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (updownImageButton.getTag().equals((R.drawable.close01))) {
updownImageButton.setBackgroundResource(R.drawable.open01);
updownImageButton.setTag(R.drawable.open01);
int top = ((ButaColleTabBarActivity) getActivity())
.getActionBarHeight() + 2;
listRelativeLayout.setPadding(0, top, 0, 50);
listLinearLayout.setPadding(0, 0, 0, 160);
} else if (updownImageButton.getTag().equals(R.drawable.open01)) {
updownImageButton.setBackgroundResource(R.drawable.close01);
updownImageButton.setTag(R.drawable.close01);
int top = ((ButaColleTabBarActivity) getActivity())
.getActionBarHeight() + 2;
listRelativeLayout.setPadding(0, top, 0, 120);
listLinearLayout.setPadding(0, 0, 0, 160);
}
}
});
int itemCount = 0;
String itemlbl = "item";
incomeItemcount_TextView = (TextView) v
.findViewById(R.id.confirm_income_item_TextView);
itemCount = dbhelper.getItemCount(1);
if (itemCount > 1)
itemlbl = "items";
incomeItemcount_TextView.setText(String.valueOf(itemCount) + itemlbl);
itemCount = 0;
itemlbl = "item";
expenseItemcount_TextView = (TextView) v
.findViewById(R.id.confirm_expense_item_TextView);
itemCount = dbhelper.getItemCount(0);
if (itemCount > 1)
itemlbl = "items";
expenseItemcount_TextView.setText(String.valueOf(itemCount) + itemlbl);
double balance = 0.0;
double incomeAmount = 0.0;
double expenseAmount = 0.0;
incomeAmount_TextView = (TextView) v
.findViewById(R.id.confirm_income_amount_TextView);
incomeAmount = dbhelper.getTotalAmount(1);
incomeAmount_TextView.setText(String.valueOf(incomeAmount) + "$");
expenseAmount_TextView = (TextView) v
.findViewById(R.id.confrim_expnese_amount_TextView);
expenseAmount = dbhelper.getTotalAmount(0);
expenseAmount_TextView.setText(String.valueOf(expenseAmount) + "$");
balance = incomeAmount - expenseAmount;
balance_TextView = (TextView) v
.findViewById(R.id.balance_amount_TextView);
balance_TextView.setText(String.valueOf(balance) + "$");
int percentage = 0;
percentage = (int) ((balance / incomeAmount) * 100);
if (balance > 0) {
heartImageView = (ImageView) v.findViewById(R.id.heart_ImageView);
heartImageView.setImageResource(R.drawable.graph);
percentage_TextView = (TextView) v
.findViewById(R.id.save_percentage);
percentage_TextView.setText(String.valueOf(percentage) + "%");
} else {
heartImageView = (ImageView) v.findViewById(R.id.heart_ImageView);
heartImageView.setImageResource(0);
percentage_TextView = (TextView) v.findViewById(0);
percentage = 0;
}
**View overlay = (View) v.findViewById(R.id.overlay);
int opacity = 200; // from 0 to 255
overlay.setBackgroundColor(opacity * 0x1000000); // black with a variable alpha
RelativeLayout.LayoutParams params =
new RelativeLayout.LayoutParams(300, 36);
overlay.setLayoutParams(params);
overlay.invalidate();**
return v;
}
请帮我看看。感谢你！
2 个答案:
答案 0 :(得分：0)
您可以尝试使用addRule方法
向params添加规则params.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
我不在我的电脑附近进行测试，但您可以使用addRule方法设置lbl_balance下方的视图
或者，尝试一起删除代码中的布局参数。 xml使视图膨胀，因此它已经创建。您在代码中需要做的就是设置背景颜色。您也可以使用
在xml中执行此操作android:background="#80000000"
答案 1 :(得分：0)
尝试更改
**<View
android:id="@+id/overlay"
android:layout_width="260dp"
android:layout_height="20dp"
android:layout_below="@+id/lbl_balance" />**
到
**<View
android:id="@+id/overlay"
android:layout_width="260dp"
android:layout_height="20dp"
android:layout_alignBottom="@+id/heart_ImageView" />**
所做的更改：布局对齐以及对齐的ID
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