Add a Textview to a FrameLayout in a determined po

问题:

I'm trying to add a textView to a frameLayout. The TextView has wrap_content properties, so it grows when the text grows. I'm adding it to a FrameLayout with this function:

((FrameLayout) findViewById(R.id.mainLayout)).addView(mEditText);

---

This is the xml of the frame layout:

<FrameLayout  
xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@+id/mainLayout"
android:layout_width="wrap_content"  
android:layout_height="wrap_content"> 
</FrameLayout>

The textView always appears in the top left corner of the screen. I'd like to position it in the middle, or top middle. How can this be done?
I looked over the answers in How can I dynamically set the position of view in Android? and they weren't much help :( Mainly caused crashes..

回答1:

Try this:

FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT, Gravity.CENTER);

((FrameLayout) findViewById(R.id.mainLayout)).addView(mEditText, params);

Change Gravity to suit your need.

BTW, the frame layout should use fill_parent for width and height

回答2:

Try to gravity or Layout gravity to your Framelayout or the Textview. It makes your Layout to the center of the screen. Use like this,

android:layout_gravity="center"

or

android:gravity="center"

回答3:

Add android:layout_gravity="center" in your frame layout

<FrameLayout  
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/mainLayout"
    android:layout_width="wrap_content"  
    android:layout_height="wrap_content"
    android:layout_gravity="center" > 
</FrameLayout>

回答4:

you can try it by set the gravity of text use it like-

textview.setGravity(Gravity.center);

othervise by xml set gravity to center so it will display you in center and if you'll use centerinparents so it will always apperas at the center of screen.

回答5:

Set FrameLayout properties android:layout_width and android:layout_height to fill_parent and also set TextView property LayoutGravity . such as Center, Right or Top.

Thanks

回答6:

Setting the gravity programatically definitely works Please set the layout_gravity to right in the xml TextView.setGravity(Gravity.RIGHT);