Set gravity of a View Programmatically

Question

Im working on a View over Android Source Code. I was wondering how can we setup multiple gravities, to a custom View

This is the XML

<com.android.systemui.statusbar.policy.Clock
        android:id="@+id/clock"
        android:textAppearance="@style/TextAppearance.StatusBar.Clock"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:singleLine="true"
        android:paddingLeft="6dip"
        android:gravity="center_vertical|left"
        />

As you see, default gravity is center_vertical|left, so my Java code should be something like this

    View clock = mStatusBarView.findViewById(R.id.clock);

    if (clock != null) {
        SOMEHOW SET GRAVITY -> mCenterClock ? Gravity.CENTER : (Gravity.CENTER_VERTICAL | Gravity.LEFT);
    }

setGravity method don't work on View. So is there an alternative of setting gravity without losing the width and height by default?.

Thanks in advance.

android:gravity="center_vertical|left", this is the attribute I wanna change. So I guess is just gravity? am I wrong? — user809486, Apr 27 '12 at 18:03
no, I understand, now - but Agarwal is right: use the actual type, not View, since the actual type will likely respond to setGravity — JRaymond, Apr 27 '12 at 18:07

score 41 · Accepted Answer · answered Apr 27 '12 at 18:21

41

Since com.android.systemui.statusbar.policy.Clock extends TextView just cast it to a TextView and set the gravity.

 TextView clock = (TextView) mStatusBarView.findViewById(R.id.clock);
 clock.setGravity(mCenterClock ? Gravity.CENTER : (Gravity.CENTER_VERTICAL | Gravity.LEFT));

Ref: Source code

answered Apr 27 '12 at 18:21

HandlerExploit

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Could you take a look here https://github.com/AOKP/frameworks_base/blob/ics/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java and here https://github.com/AOKP/frameworks_base/blob/ics/packages/SystemUI/res/layout/status_bar.xml Seems like is the best way. I think your way is not working because is a linearLayout. – user809486 Apr 27 '12 at 18:43
I ended up by porting code from AOKP source, however your answer was the more accurate. Thanks. – user809486 Apr 27 '12 at 19:04

Arif Nadeem · Answer 2 · 2012-04-27T18:16:44.927

8

Have you tried?

clock.setGravity(Gravity.CENTER | Gravity.CENTER_VERTICAL);

Edit:

Since you cannot use setGravity for a plain View, do something like this,

You can use a RelativeLayout and set a rule like this...

RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
params.addRule(RelativeLayout.CENTER_HORIZONTAL|RelativeLayout.CENTER_IN_PARENT, clock.getId());

edited Apr 27 '12 at 18:16

answered Apr 27 '12 at 18:05

Arif Nadeem

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Yes. setGravity method is not available for this View. So it wont compile – user809486 Apr 27 '12 at 18:06
does Clock extend a certain type of viewgroup? Or just a generic view? It may make more sense to extend a viewgroup, such as LinearLayout. – ootinii Apr 27 '12 at 18:11
I'll give it a try, however HandlerExploit solution seems also possible – user809486 Apr 27 '12 at 18:32
Yes that is the best solution, my answer would have been the same if I knew that your Custom View extends TextView. +1 for his answer.. You can also do this if in future your View doesn't extend TextView. Thanks. – Arif Nadeem Apr 27 '12 at 18:34

score 2 · Answer 3 · answered Apr 27 '12 at 18:02

2

 com.android.systemui.statusbar.policy.Clock clock = (com.android.systemui.statusbar.policy.Clock)mStatusBarView.findViewById(R.id.clock);

 clock.setGravity(Gravity.CENTER_VERTICAL);

try the above code and remove View clock = mStatusBarView.findViewById(R.id.clock);

answered Apr 27 '12 at 18:02

Shankar Agarwal

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Or just import `com.android.systemui.statusbar.policy.Clock` to not clutter your codebase, if you prefer – JRaymond Apr 27 '12 at 18:07

Set gravity of a View Programmatically

3 Answers3