问题
I want to have an Android Button with icon+text centered inside it. I\'m using the drawableLeft attribute to set the image, this works well if the button has a width of \"wrap_content\" but I need to stretch to max width so I use width \"fill_parent\". This moves my icon straight to the left of the button and I want both icon and text centered inside the button.
I\'ve try setting up the padding but this only allows to give a fixed value so it is not what I need. I need to have icon+text aligned in the center.
<Button
android:id=\"@+id/startTelemoteButton\"
android:text=\"@string/start_telemote\"
android:drawableLeft=\"@drawable/start\"
android:paddingLeft=\"20dip\"
android:paddingRight=\"20dip\"
android:width=\"fill_parent\"
android:heigh=\"wrap_content\" />
Any suggestions on how I could achieve that?
回答1:
android:drawableLeft is always keeping android:paddingLeft as a distance from the left border. When the button is not set to android:width="wrap_content", it will always hang to the left!
With Android 4.0 (API level 14) you can use android:drawableStart attribute to place a drawable at the start of the text. The only backward compatible solution I've come up with is using an ImageSpan to create a Text+Image Spannable:
Button button = (Button) findViewById(R.id.button);
Spannable buttonLabel = new SpannableString(" Button Text");
buttonLabel.setSpan(new ImageSpan(getApplicationContext(), R.drawable.icon,
ImageSpan.ALIGN_BOTTOM), 0, 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
button.setText(buttonLabel);
In my case I needed to also adjust the android:gravity attribute of the Button to make it look centered:
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:minHeight="32dp"
android:minWidth="150dp"
android:gravity="center_horizontal|top" />
回答2:
I know I am late in answering this question, but this helped me:
<FrameLayout
android:layout_width="match_parent"
android:layout_height="35dp"
android:layout_marginBottom="5dp"
android:layout_marginTop="10dp"
android:background="@color/fb" >
<Button
android:id="@+id/fbLogin"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="center"
android:background="@null"
android:drawableLeft="@drawable/ic_facebook"
android:gravity="center"
android:minHeight="0dp"
android:minWidth="0dp"
android:text="FACEBOOK"
android:textColor="@android:color/white" />
</FrameLayout>
I found this solution from here: Android UI struggles: making a button with centered text and icon
回答3:
I used LinearLayout instead of Button. The OnClickListener, which I need to use works fine also for LinearLayout.
<LinearLayout
android:id="@+id/my_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/selector"
android:gravity="center"
android:orientation="horizontal"
android:clickable="true">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="15dp"
android:adjustViewBounds="true"
android:scaleType="fitCenter"
android:src="@drawable/icon" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:text="Text" />
</LinearLayout>
回答4:
I recently bumped into the same problem. Tried to find a cheaper solution so came up with this.
<LinearLayout
android:id="@+id/linearButton"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/selector_button_translucent_ab_color"
android:clickable="true"
android:descendantFocusability="blocksDescendants"
android:gravity="center"
android:orientation="horizontal" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="@string/app_name"
android:src="@drawable/ic_launcher" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/app_name"
android:textColor="@android:color/white" />
</LinearLayout>
Then just call the OnClickListener on LinearLayout.
Hope this helps someone as it seems like a very common problem. :)
回答5:
I adjust it by adding padding left and right as follows:
<Button
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:id="@+id/btn_facebookact_like"
android:text="@string/btn_facebookact_like"
android:textColor="@color/black"
android:textAllCaps="false"
android:background="@color/white"
android:drawableStart="@drawable/like"
android:drawableLeft="@drawable/like"
android:gravity="center"
android:layout_gravity="center"
android:paddingLeft="40dp"
android:paddingRight="40dp"
/>
回答6:
You could use a custom button which measures and draws itself to accomodate a left drawable. Please find example and usage here
public class DrawableAlignedButton extends Button {
public DrawableAlignedButton(Context context, AttributeSet attrs) {
super(context, attrs);
}
public DrawableAlignedButton(Context context) {
super(context);
}
public DrawableAlignedButton(Context context, AttributeSet attrs, int style) {
super(context, attrs, style);
}
private Drawable mLeftDrawable;
@Override
//Overriden to work only with a left drawable.
public void setCompoundDrawablesWithIntrinsicBounds(Drawable left,
Drawable top, Drawable right, Drawable bottom) {
if(left == null) return;
left.setBounds(0, 0, left.getIntrinsicWidth(), left.getIntrinsicHeight());
mLeftDrawable = left;
}
@Override
protected void onDraw(Canvas canvas) {
//transform the canvas so we can draw both image and text at center.
canvas.save();
canvas.translate(2+mLeftDrawable.getIntrinsicWidth()/2, 0);
super.onDraw(canvas);
canvas.restore();
canvas.save();
int widthOfText = (int)getPaint().measureText(getText().toString());
int left = (getWidth()+widthOfText)/2 - mLeftDrawable.getIntrinsicWidth() - 2;
canvas.translate(left, (getHeight()-mLeftDrawable.getIntrinsicHeight())/2);
mLeftDrawable.draw(canvas);
canvas.restore();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int height = getMeasuredHeight();
height = Math.max(height, mLeftDrawable.getIntrinsicHeight() + getPaddingTop() + getPaddingBottom());
setMeasuredDimension(getMeasuredWidth(), height);
}
}
Usage
<com.mypackage.DrawableAlignedButton
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:drawableLeft="@drawable/my_drawable"
android:gravity="center"
android:padding="7dp"
android:text="My Text" />
回答7:
All the previous answers seem to be outdated
You can use the MaterialButton now which lets setting the icon gravity.
<com.google.android.material.button.MaterialButton
android:id="@+id/btnDownloadPdf"
android:layout_width="0dp"
android:layout_height="56dp"
android:layout_margin="16dp"
android:gravity="center"
android:textAllCaps="true"
app:backgroundTint="#fc0"
app:icon="@drawable/ic_pdf"
app:iconGravity="textStart"
app:iconPadding="10dp"
app:iconTint="#f00"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
tools:text="Download Pdf" />
Edit:
For using the material components you will obviously need to:
Add a dependency
implementation 'com.google.android.material:material:1.1.0-alpha10' (last version)
Make your theme extend Material Components theme
<style name="AppTheme" parent="Theme.MaterialComponents.Light">
...
</style>
In case you cannot do so, extend it from the Material Bridge theme
<style name="AppTheme" parent="Theme.MaterialComponents.Light.Bridge">
...
</style>
回答8:
I know this question is a bit older, but perhaps you're still open for hints or workarounds:
Create a RelativeLayout "wrap_content" with the button image as the background or the button itself as the first element of the layout. Get a LinearLayout and set it to "layout_centerInParent" and "wrap_content". Then set your Drawable as an Imageview. At last set a TextView with your text (locale).
so basically you have this structure:
RelativeLayout
Button
LinearLayout
ImageView
TextView
or like this:
RelativeLayout with "android-specific" button image as background
LinearLayout
ImageView
TextView
I know with this solution there are many elements to deal with, but you can create very easy your own custom button with it and also set the exact position of text and drawables :)
回答9:
My way of solving it involved surrounding the the button with lightweight <View ../> elements that resize dynamically. Below are several examples of what can be achieved with this:
Note that the clickable area of the buttons in example 3 is the same as in 2 (i.e. with spaces), which is different from example 4 where there are no "unclickable" gaps in between.
Code:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:layout_marginStart="5dp"
android:layout_marginLeft="5dp"
android:layout_marginTop="10dp"
android:layout_marginBottom="5dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textStyle="bold"
android:text="Example 1: Button with a background color:"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<View
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
android:textColor="@android:color/white"
android:drawableLeft="@android:drawable/ic_secure"
android:drawableStart="@android:drawable/ic_secure"
android:background="@android:color/darker_gray"
android:paddingStart="20dp"
android:paddingEnd="20dp"
android:layout_weight="0.3"/>
<!-- Play around with the above 3 values to modify the clickable
area and image alignment with respect to text -->
<View
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"/>
</LinearLayout>
<TextView
android:layout_marginStart="5dp"
android:layout_marginLeft="5dp"
android:layout_marginTop="20dp"
android:layout_marginBottom="5dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textStyle="bold"
android:text="Example 2: Button group + transparent layout + spacers:"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<View
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
android:textColor="@android:color/white"
android:drawableLeft="@android:drawable/ic_secure"
android:drawableStart="@android:drawable/ic_secure"
android:background="@android:color/darker_gray"
android:paddingStart="10dp"
android:paddingEnd="10dp"
android:layout_weight="1"/>
<View
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
android:textColor="@android:color/white"
android:drawableLeft="@android:drawable/ic_secure"
android:drawableStart="@android:drawable/ic_secure"
android:background="@android:color/darker_gray"
android:paddingStart="10dp"
android:paddingEnd="10dp"
android:layout_weight="1"/>
<View
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
android:textColor="@android:color/white"
android:drawableLeft="@android:drawable/ic_secure"
android:drawableStart="@android:drawable/ic_secure"
android:background="@android:color/darker_gray"
android:paddingStart="10dp"
android:paddingEnd="10dp"
android:layout_weight="1"/>
<View
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"/>
</LinearLayout>
<TextView
android:layout_marginStart="5dp"
android:layout_marginLeft="5dp"
android:layout_marginTop="20dp"
android:layout_marginBottom="5dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textStyle="bold"
android:text="Example 3: Button group + colored layout:"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/darker_gray">
<View
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"/>
<Button
style="?android:attr/buttonBarButtonStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
android:textColor="@android:color/white"
android:drawableLeft="@android:drawable/ic_secure"
android:drawableStart="@android:drawable/ic_secure"
android:background="@android:color/darker_gray"
android:paddingStart="10dp"
android:paddingEnd="10dp"
android:layout_weight="1"/>
<View
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"/>
<Button
style="?android:attr/buttonBarButtonStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
android:textColor="@android:color/white"
android:drawableLeft="@android:drawable/ic_secure"
android:drawableStart="@android:drawable/ic_secure"
android:background="@android:color/darker_gray"
android:paddingStart="10dp"
android:paddingEnd="10dp"
android:layout_weight="1"/>
<View
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"/>
<Button
style="?android:attr/buttonBarButtonStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
android:textColor="@android:color/white"
android:drawableLeft="@android:drawable/ic_secure"
android:drawableStart="@android:drawable/ic_secure"
android:background="@android:color/darker_gray"
android:paddingStart="10dp"
android:paddingEnd="10dp"
android:layout_weight="1"/>
<View
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"/>
</LinearLayout>
<TextView
android:layout_marginStart="5dp"
android:layout_marginLeft="5dp"
android:layout_marginTop="20dp"
android:layout_marginBottom="5dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textStyle="bold"
android:text="Example 4 (reference): Button group + no spacers:"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/darker_gray">
<Button
style="?android:attr/buttonBarButtonStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
android:textColor="@android:color/white"
android:drawableLeft="@android:drawable/ic_secure"
android:drawableStart="@android:drawable/ic_secure"
android:background="@android:color/darker_gray"
android:paddingStart="10dp"
android:paddingEnd="10dp"
android:layout_weight="1"/>
<Button
style="?android:attr/buttonBarButtonStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
android:textColor="@android:color/white"
android:drawableLeft="@android:drawable/ic_secure"
android:drawableStart="@android:drawable/ic_secure"
android:background="@android:color/darker_gray"
android:paddingStart="10dp"
android:paddingEnd="10dp"
android:layout_weight="1"/>
<Button
style="?android:attr/buttonBarButtonStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
android:textColor="@android:color/white"
android:drawableLeft="@android:drawable/ic_secure"
android:drawableStart="@android:drawable/ic_secure"
android:background="@android:color/darker_gray"
android:paddingStart="10dp"
android:paddingEnd="10dp"
android:layout_weight="1"/>
</LinearLayout>
</LinearLayout>
回答10:
This is my solution I wrote 3 years ago. Button has text and left icon and is in frame that is actual button here and can be stretched by fill_parent. I cannot test it again but it was working back then. Probably Button don't have to be used and can be replaced by TextView but I will not test it right now and it doesn't change functionality too much here.
<FrameLayout
android:id="@+id/login_button_login"
android:background="@drawable/apptheme_btn_default_holo_dark"
android:layout_width="fill_parent"
android:layout_gravity="center"
android:layout_height="40dp">
<Button
android:clickable="false"
android:drawablePadding="15dp"
android:layout_gravity="center"
style="@style/WhiteText.Small.Bold"
android:drawableLeft="@drawable/lock"
android:background="@color/transparent"
android:text="LOGIN" />
</FrameLayout>
回答11:
You can create a custom widget:
The Java class IButton:
public class IButton extends RelativeLayout {
private RelativeLayout layout;
private ImageView image;
private TextView text;
public IButton(Context context) {
this(context, null);
}
public IButton(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public IButton(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate(R.layout.ibutton, this, true);
layout = (RelativeLayout) view.findViewById(R.id.btn_layout);
image = (ImageView) view.findViewById(R.id.btn_icon);
text = (TextView) view.findViewById(R.id.btn_text);
if (attrs != null) {
TypedArray attributes = context.obtainStyledAttributes(attrs,R.styleable.IButtonStyle);
Drawable drawable = attributes.getDrawable(R.styleable.IButtonStyle_button_icon);
if(drawable != null) {
image.setImageDrawable(drawable);
}
String str = attributes.getString(R.styleable.IButtonStyle_button_text);
text.setText(str);
attributes.recycle();
}
}
@Override
public void setOnClickListener(final OnClickListener l) {
super.setOnClickListener(l);
layout.setOnClickListener(l);
}
public void setDrawable(int resId) {
image.setImageResource(resId);
}
}
The layout ibutton.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/btn_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true" >
<ImageView
android:id="@+id/btn_icon"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_marginRight="2dp"
android:layout_toLeftOf="@+id/btn_text"
android:duplicateParentState="true" />
<TextView
android:id="@+id/btn_text"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_centerInParent="true"
android:duplicateParentState="true"
android:gravity="center_vertical"
android:textColor="#000000" />
</RelativeLayout>
In order to use this custom widget:
<com.test.android.widgets.IButton
android:id="@+id/new"
android:layout_width="fill_parent"
android:layout_height="@dimen/button_height"
ibutton:button_text="@string/btn_new"
ibutton:button_icon="@drawable/ic_action_new" />
You have to provide the namespace for the custom attributes xmlns:ibutton="http://schemas.android.com/apk/res/com.test.android.xxx" where com.test.android.xxx is the root package of the application.
Just put it below xmlns:android="http://schemas.android.com/apk/res/android".
The last thing you gonna need are the custom attributes in the attrs.xml.
In the attrs.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="IButtonStyle">
<attr name="button_text" />
<attr name="button_icon" format="integer" />
</declare-styleable>
<attr name="button_text" />
</resources>
For better positioning, wrap the custom Button inside a LinearLayout, if you want to avoid potential problems with RelativeLayout positionings.
Enjoy!
回答12:
Had similar issue but wanted to have center drawable with no text and no wrapped layouts. Solution was to create custom button and add one more drawable in addition to LEFT, RIGHT, TOP, BOTTOM. One can easily modify drawable placement and have it in desired position relative to text.
CenterDrawableButton.java
public class CenterDrawableButton extends Button {
private Drawable mDrawableCenter;
public CenterDrawableButton(Context context) {
super(context);
init(context, null);
}
public CenterDrawableButton(Context context, AttributeSet attrs) {
super(context, attrs);
init(context, attrs);
}
public CenterDrawableButton(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context, attrs);
}
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public CenterDrawableButton(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
init(context, attrs);
}
private void init(Context context, AttributeSet attrs){
//if (isInEditMode()) return;
if(attrs!=null){
TypedArray a = context.getTheme().obtainStyledAttributes(
attrs, R.styleable.CenterDrawableButton, 0, 0);
try {
setCenterDrawable(a.getDrawable(R.styleable.CenterDrawableButton_drawableCenter));
} finally {
a.recycle();
}
}
}
public void setCenterDrawable(int center) {
if(center==0){
setCenterDrawable(null);
}else
setCenterDrawable(getContext().getResources().getDrawable(center));
}
public void setCenterDrawable(@Nullable Drawable center) {
int[] state;
state = getDrawableState();
if (center != null) {
center.setState(state);
center.setBounds(0, 0, center.getIntrinsicWidth(), center.getIntrinsicHeight());
center.setCallback(this);
}
mDrawableCenter = center;
invalidate();
requestLayout();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if(mDrawableCenter!=null) {
setMeasuredDimension(Math.max(getMeasuredWidth(), mDrawableCenter.getIntrinsicWidth()),
Math.max(getMeasuredHeight(), mDrawableCenter.getIntrinsicHeight()));
}
}
@Override
protected void drawableStateChanged() {
super.drawableStateChanged();
if (mDrawableCenter != null) {
int[] state = getDrawableState();
mDrawableCenter.setState(state);
mDrawableCenter.setBounds(0, 0, mDrawableCenter.getIntrinsicWidth(),
mDrawableCenter.getIntrinsicHeight());
}
invalidate();
}
@Override
protected void onDraw(@NonNull Canvas canvas) {
super.onDraw(canvas);
if (mDrawableCenter != null) {
Rect rect = mDrawableCenter.getBounds();
canvas.save();
canvas.translate(getWidth() / 2 - rect.right / 2, getHeight() / 2 - rect.bottom / 2);
mDrawableCenter.draw(canvas);
canvas.restore();
}
}
}
attrs.xml
<resources>
<attr name="drawableCenter" format="reference"/>
<declare-styleable name="CenterDrawableButton">
<attr name="drawableCenter"/>
</declare-styleable>
</resources>
usage
<com.virtoos.android.view.custom.CenterDrawableButton
android:id="@id/centerDrawableButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:drawableCenter="@android:drawable/ic_menu_info_details"/>
回答13:
Try to use this library
OmegaCenterIconButton
回答14:
<style name="captionOnly">
<item name="android:background">@null</item>
<item name="android:clickable">false</item>
<item name="android:focusable">false</item>
<item name="android:minHeight">0dp</item>
<item name="android:minWidth">0dp</item>
</style>
<FrameLayout
style="?android:attr/buttonStyle"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<Button
style="@style/captionOnly"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:drawableLeft="@android:drawable/ic_delete"
android:gravity="center"
android:text="Button Challenge" />
</FrameLayout>
Put the FrameLayout in LinearLayout and set orientation to Horizontal.
回答15:
You could put the button over a LinearLayout
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="@dimen/activity_login_fb_height"
android:background="@mipmap/bg_btn_fb">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/lblLoginFb"
android:textColor="@color/white"
android:drawableLeft="@mipmap/icon_fb"
android:textSize="@dimen/activity_login_fb_textSize"
android:text="Login with Facebook"
android:gravity="center" />
</LinearLayout>
<Button
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/btnLoginFb"
android:background="@color/transparent"
/>
</RelativeLayout>
回答16:
I have centered textView with icon using paddingLeft and and aligning textView to left|centerVertical. and for a small gap between view and icon i used drawablePadding
<Button
android:id="@+id/have_it_main"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/textbox"
android:drawableLeft="@drawable/have_it"
android:drawablePadding="30dp"
android:gravity="left|center_vertical"
android:paddingLeft="60dp"
android:text="Owner Contact"
android:textColor="@android:color/white" />
回答17:
What happens if you try android:gravity="center_horizontal"?
回答18:
I think android:gravity= "centre" should work
回答19:
As suggested by Rodja, prior to 4.0 there isn't a direct way to center the text with the drawable. And indeed setting a padding_left value does move the drawable away from the border. Therefore my suggestion is that on runtime you calculate exactly how many pixels from the left border your drawable needs to be and then pass it using setPadding Your calculation may be something like
int paddingLeft = (button.getWidth() - drawableWidth - textWidth) / 2;
The width of your drawable's is fixed and you can look it up and you can also calculate or guess the text width.
Finally, you would need to multiple the padding value by the screen density, which you can do using DisplayMetrics
回答20:
I dont't test it but seems that you can use CenteredContentButton library
回答21:
public class DrawableCenterTextView extends TextView {
public DrawableCenterTextView(Context context, AttributeSet attrs,
int defStyle) {
super(context, attrs, defStyle);
}
public DrawableCenterTextView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public DrawableCenterTextView(Context context) {
super(context);
}
@Override
protected void onDraw(Canvas canvas) {
Drawable[] drawables = getCompoundDrawables();
if (drawables != null) {
Drawable drawableLeft = drawables[0];
Drawable drawableRight = drawables[2];
if (drawableLeft != null || drawableRight != null) {
float textWidth = getPaint().measureText(getText().toString());
int drawablePadding = getCompoundDrawablePadding();
int drawableWidth = 0;
if (drawableLeft != null)
drawableWidth = drawableLeft.getIntrinsicWidth();
else if (drawableRight != null) {
drawableWidth = drawableRight.getIntrinsicWidth();
}
float bodyWidth = textWidth + drawableWidth + drawablePadding;
canvas.translate((getWidth() - bodyWidth) / 2, 0);
}
}
super.onDraw(canvas);
}
}
回答22:
Dirty fix.
android:paddingTop="10dp"
android:drawableTop="@drawable/ic_src"
Figuring right padding solve the purpose. However, for varied screen, use different padding and put that in dimens resource in respective value folder.
回答23:
Use RelativeLayout (container) and android:layout_centerHorizontal="true" ,my sample:
<RelativeLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1" >
<CheckBox
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_centerHorizontal="true"
android:layout_gravity="center"
android:layout_marginBottom="5dp"
android:layout_marginLeft="10dp"
android:layout_marginTop="5dp"
android:button="@drawable/bg_fav_detail"
android:drawablePadding="5dp"
android:text=" Favorite" />
</RelativeLayout>
回答24:
Other possibility to keep Button theme.
<Button
android:id="@+id/pf_bt_edit"
android:layout_height="@dimen/standard_height"
android:layout_width="match_parent"
/>
<LinearLayout
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_alignBottom="@id/pf_bt_edit"
android:layout_alignLeft="@id/pf_bt_edit"
android:layout_alignRight="@id/pf_bt_edit"
android:layout_alignTop="@id/pf_bt_edit"
android:layout_margin="@dimen/margin_10"
android:clickable="false"
android:elevation="20dp"
android:gravity="center"
android:orientation="horizontal"
>
<ImageView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:adjustViewBounds="true"
android:clickable="false"
android:src="@drawable/ic_edit_white_48dp"/>
<TextView
android:id="@+id/pf_tv_edit"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_marginLeft="@dimen/margin_5"
android:clickable="false"
android:gravity="center"
android:text="@string/pf_bt_edit"/>
</LinearLayout>
With this solution if your add @color/your_color @color/your_highlight_color in your activity theme, you can have Matherial theme on Lollipop whith shadow and ripple, and for previous version flat button with your color and highlight coor when you press it.
Moreover, with this solution autoresize of picture
Result : First on Lollipop device Second : On pre lollipop device 3th : Pre lollipop device press button
回答25:
This may be an old/closed thread but I've search everywhere didnt find something useful, until I decided to create my own solution. If theres anyone here trying to look for answer try this one, might save you a minute of thinking
<LinearLayout
android:id="@+id/llContainer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/selector"
android:clickable="true"
android:gravity="center"
android:orientation="vertical"
android:padding="10dp"
android:textStyle="bold">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:text="This is a text" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/icon_image />
</LinearLayout>
Because Linear layout act as the container and the one who has the selector, when you click the entire linear layout it would look just how it should it be. if you want it to be both centered, use relative insteaf. If you want it centered horizontally change the orientation to horizontal.
Take note DO NOT forget to add android:clickable="true" to your main container (relative or linear) for the action to take place.
Again this may be old thread but may still help someone there.
-cheers hope it helps- happycodings.
回答26:
If you use one of custom view's solutions, be careful, because they often fail on long or multiline text. I rewrote some answers, replaced onDraw() and understood that that was a wrong way.
回答27:
use this
android:background="@drawable/ic_play_arrow_black_24dp"
just set the background to the icon you want to center
来源：https://stackoverflow.com/questions/3634191/how-to-center-icon-and-text-in-a-android-button-with-width-set-to-fill-parent