How to set layout gravity for activity root view

up vote
0
down vote

favorite

I get the root view (Which in my case happens to be RelativeLayout) using the below code:

final ViewGroup viewGroup = (ViewGroup) ((ViewGroup) this

        .findViewById(android.R.id.content)).getChildAt(0);

Source: Get root view from current activity

Now I want to set the size and the layout gravity of the root view. But I don't know the layout type of its parent

The below code works when the view I want to set it's layout params is inside a LinearLayout.

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.FILL_PARENT);

params.weight = 1.0f;

params.gravity = Gravity.TOP;



button.setLayoutParams(params);

Source: How to set layout_gravity programmatically?

asked Nov 12 at 20:02

Jack

153112

add a comment |

up vote
0
down vote

favorite

I get the root view (Which in my case happens to be RelativeLayout) using the below code:

final ViewGroup viewGroup = (ViewGroup) ((ViewGroup) this

        .findViewById(android.R.id.content)).getChildAt(0);

Source: Get root view from current activity

Now I want to set the size and the layout gravity of the root view. But I don't know the layout type of its parent

The below code works when the view I want to set it's layout params is inside a LinearLayout.

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.FILL_PARENT);

params.weight = 1.0f;

params.gravity = Gravity.TOP;



button.setLayoutParams(params);

Source: How to set layout_gravity programmatically?

asked Nov 12 at 20:02

Jack

153112

add a comment |

up vote
0
down vote

favorite

I get the root view (Which in my case happens to be RelativeLayout) using the below code:

final ViewGroup viewGroup = (ViewGroup) ((ViewGroup) this

        .findViewById(android.R.id.content)).getChildAt(0);

Source: Get root view from current activity

Now I want to set the size and the layout gravity of the root view. But I don't know the layout type of its parent

The below code works when the view I want to set it's layout params is inside a LinearLayout.

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.FILL_PARENT);

params.weight = 1.0f;

params.gravity = Gravity.TOP;



button.setLayoutParams(params);

Source: How to set layout_gravity programmatically?

asked Nov 12 at 20:02

Jack

153112

I get the root view (Which in my case happens to be RelativeLayout) using the below code:

final ViewGroup viewGroup = (ViewGroup) ((ViewGroup) this

        .findViewById(android.R.id.content)).getChildAt(0);

Source: Get root view from current activity

Now I want to set the size and the layout gravity of the root view. But I don't know the layout type of its parent

The below code works when the view I want to set it's layout params is inside a LinearLayout.

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.FILL_PARENT);

params.weight = 1.0f;

params.gravity = Gravity.TOP;



button.setLayoutParams(params);

Source: How to set layout_gravity programmatically?

android android-layout

asked Nov 12 at 20:02

Jack

153112

asked Nov 12 at 20:02

Jack

153112

asked Nov 12 at 20:02

Jack

153112

asked Nov 12 at 20:02

Jack

153112

asked Nov 12 at 20:02

Jack

153112

add a comment |

1 Answer
1

active

oldest

votes

up vote
0
down vote

I believe you need DecorView.LayoutParams.

The root view is added to a DecorView, which is attached to the Activity's Window.

PhoneWindow.java

Since the DecorView in question isn't accessible to apps in general, you can use FrameLayout.LayoutParams.

edited Nov 12 at 21:02

answered Nov 12 at 20:11

TheWanderer

5,66111025

Thank you, it turns out that the parent of the root view is a FrameLayout, as my app crashed and AS says can't cast RelativeLayout (root) to FrameLayout when I use rootview.setLayoutParams(params);
– Jack
Nov 12 at 20:59

Oh right, the DecorView you're using is probably from the ViewPager class, since the internal one is hidden. I guess ViewPager's extends RelativeLayout and not FrameLayout.
– TheWanderer
Nov 12 at 21:01

add a comment |

Your Answer

StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");

StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});

function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});

}
});

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53269281%2fhow-to-set-layout-gravity-for-activity-root-view%23new-answer', 'question_page');
}
);

Post as a guest

Name

Required, but never shown

1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

up vote
0
down vote

I believe you need DecorView.LayoutParams.

The root view is added to a DecorView, which is attached to the Activity's Window.

PhoneWindow.java

Since the DecorView in question isn't accessible to apps in general, you can use FrameLayout.LayoutParams.

edited Nov 12 at 21:02

answered Nov 12 at 20:11

TheWanderer

5,66111025

Thank you, it turns out that the parent of the root view is a FrameLayout, as my app crashed and AS says can't cast RelativeLayout (root) to FrameLayout when I use rootview.setLayoutParams(params);
– Jack
Nov 12 at 20:59

Oh right, the DecorView you're using is probably from the ViewPager class, since the internal one is hidden. I guess ViewPager's extends RelativeLayout and not FrameLayout.
– TheWanderer
Nov 12 at 21:01

add a comment |

up vote
0
down vote

I believe you need DecorView.LayoutParams.

The root view is added to a DecorView, which is attached to the Activity's Window.

PhoneWindow.java

Since the DecorView in question isn't accessible to apps in general, you can use FrameLayout.LayoutParams.

edited Nov 12 at 21:02

answered Nov 12 at 20:11

TheWanderer

5,66111025

Thank you, it turns out that the parent of the root view is a FrameLayout, as my app crashed and AS says can't cast RelativeLayout (root) to FrameLayout when I use rootview.setLayoutParams(params);
– Jack
Nov 12 at 20:59

Oh right, the DecorView you're using is probably from the ViewPager class, since the internal one is hidden. I guess ViewPager's extends RelativeLayout and not FrameLayout.
– TheWanderer
Nov 12 at 21:01

add a comment |

up vote
0
down vote

I believe you need DecorView.LayoutParams.

The root view is added to a DecorView, which is attached to the Activity's Window.

PhoneWindow.java

Since the DecorView in question isn't accessible to apps in general, you can use FrameLayout.LayoutParams.

edited Nov 12 at 21:02

answered Nov 12 at 20:11

TheWanderer

5,66111025

I believe you need DecorView.LayoutParams.

The root view is added to a DecorView, which is attached to the Activity's Window.

PhoneWindow.java

Since the DecorView in question isn't accessible to apps in general, you can use FrameLayout.LayoutParams.

edited Nov 12 at 21:02

answered Nov 12 at 20:11

TheWanderer

5,66111025

edited Nov 12 at 21:02

answered Nov 12 at 20:11

TheWanderer

5,66111025

answered Nov 12 at 20:11

TheWanderer

5,66111025

answered Nov 12 at 20:11

TheWanderer

5,66111025

Thank you, it turns out that the parent of the root view is a FrameLayout, as my app crashed and AS says can't cast RelativeLayout (root) to FrameLayout when I use rootview.setLayoutParams(params);
– Jack
Nov 12 at 20:59

Oh right, the DecorView you're using is probably from the ViewPager class, since the internal one is hidden. I guess ViewPager's extends RelativeLayout and not FrameLayout.
– TheWanderer
Nov 12 at 21:01

add a comment |

Thank you, it turns out that the parent of the root view is a FrameLayout, as my app crashed and AS says can't cast RelativeLayout (root) to FrameLayout when I use rootview.setLayoutParams(params);
– Jack
Nov 12 at 20:59

Oh right, the DecorView you're using is probably from the ViewPager class, since the internal one is hidden. I guess ViewPager's extends RelativeLayout and not FrameLayout.
– TheWanderer
Nov 12 at 21:01

Thank you, it turns out that the parent of the root view is a FrameLayout, as my app crashed and AS says can't cast RelativeLayout (root) to FrameLayout when I use rootview.setLayoutParams(params);
– Jack
Nov 12 at 20:59

Oh right, the DecorView you're using is probably from the ViewPager class, since the internal one is hidden. I guess ViewPager's extends RelativeLayout and not FrameLayout.
– TheWanderer
Nov 12 at 21:01

add a comment |

draft saved

draft discarded

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Name

Required, but never shown

Name

Required, but never shown

This page is only for reference, If you need detailed information, please check here

搜尋此網誌

Cfrgtkky