问题
- I have a
listview, that has a singleimageviewwhich is scrollable vertically - I am trying to place a
textviewon top ofImageview - Both the views must be visible
- Is it possible ?
- If yes, How to do it programmatically ?
- What changes should i need to make ?
list_view_item_for_images.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ImageView
android:id="@+id/flag"
android:layout_width="fill_parent"
android:layout_height="250dp"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:scaleType="fitXY"
android:src="@drawable/ic_launcher" />
</RelativeLayout>
It gives a output like below
How to do something like below
note :: Dish 1 & 2 are textviews
回答1:
This should give you the required layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ImageView
android:id="@+id/flag"
android:layout_width="fill_parent"
android:layout_height="250dp"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:scaleType="fitXY"
android:src="@drawable/ic_launcher" />
<TextView
android:id="@+id/textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginTop="20dp"
android:layout_centerHorizontal="true" />
</RelativeLayout>
Play with the android:layout_marginTop="20dp" to see which one suits you better. Use the id textview to dynamically set the android:text value.
Since a RelativeLayout stacks its children, defining the TextView after ImageView puts it 'over' the ImageView.
NOTE: Similar results can be obtained using a FrameLayout as the parent, along with the efficiency gain over using any other android container. Thanks to Igor Ganapolsky(see comment below) for pointing out that this answer needs an update.
回答2:
Try this:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/rel_layout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ImageView
android:id="@+id/ImageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src=//source of image />
<TextView
android:id="@+id/ImageViewText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@id/ImageView"
android:layout_alignTop="@id/ImageView"
android:layout_alignRight="@id/ImageView"
android:layout_alignBottom="@id/ImageView"
android:text=//u r text here
android:gravity="center"
/>
Hope this could help you.
回答3:
you can use framelayout to achieve this.
how to use framelayout
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageView
android:src="@drawable/ic_launcher"
android:scaleType="fitCenter"
android:layout_height="250px"
android:layout_width="250px"/>
<TextView
android:text="Frame Demo"
android:textSize="30px"
android:textStyle="bold"
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:gravity="center"/>
</FrameLayout>
ref: tutorialspoint
回答4:
As you mentioned in OP, you need to overlay Text on ImageView programmatically way. You can get ImageView drawable and write on it with the help of putting it on Canvas and Paint.
private BitmapDrawable writeTextOnDrawable(int drawableId, String text)
{
Bitmap bm = BitmapFactory.decodeResource(getResources(), drawableId).copy(Bitmap.Config.ARGB_8888, true);
Typeface tf = Typeface.create("Helvetica", Typeface.BOLD);
Paint paint = new Paint();
paint.setStyle(Style.FILL);
paint.setColor(Color.WHITE);
paint.setTypeface(tf);
paint.setTextAlign(Align.CENTER);
paint.setTextSize(11);
Rect textRect = new Rect();
paint.getTextBounds(text, 0, text.length(), textRect);
Canvas canvas = new Canvas(bm);
canvas.drawText(text, xPos, yPos, paint);
return new BitmapDrawable(getResources(), bm);
}
回答5:
just drag and drop the TextView over ImageView in eclipse
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="48dp"
android:layout_marginTop="114dp"
android:src="@drawable/bluehills" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/imageView1"
android:layout_centerVertical="true"
android:layout_marginLeft="85dp"
android:text="TextView" />
</RelativeLayout>
And this the output the above xml
回答6:
you can try this too. I use just framelayout.
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/cover"
android:gravity="bottom">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Hello !"
android:id="@+id/welcomeTV"
android:textColor="@color/textColor"
android:layout_gravity="left|bottom" />
</FrameLayout>
回答7:
Maybe you should just write the ImageView first and the TextView second. That can help sometimes. That's simple but I hope it helps somebody. :)
来源：https://stackoverflow.com/questions/19065232/placing-a-textview-on-top-of-imageview-in-android