Add centered postition of text in button.

Author: jpelczar

README.md

@@ -7,17 +7,19 @@ Then select library folder from project. And start use. </p>
 <p> >=API 8 </p>
 
 <h2> Reference </h2>
+<p> Default image position is left and centered text in button. When image is bigger than half of width, weight automatically is setting to 1. <br>
+Only when image is in horizontal position text can be center.  </p>
 <h3> XML tag's </h3>
 
 This is the base tag of CustomButton:<br>
 ```xml
-<pl.sigmapoint.customview.CustomButton<br>
+<pl.sigmapoint.customview.CustomButton
      android:id="@+id/sigmapoint_button"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:text="text"/>
 ```
-<p> You can specify the following things:<br>
+<p> You can specify the following things:
 cb_primary_color - \/
 cb_secondary_color - you can specify only two colors for all button. But it will be override by background, text, frame color. {format - color} <br>
 cb_background - background color of normal button  {format - color} <br>
@@ -35,6 +37,7 @@ cb_text_padding_top - {format - dimension} <br>
 cb_text_padding_right - {format - dimension} <br>
 cb_text_padding_bottom - {format - dimension} <br>
 cb_text_weight - {format - integer} <br>
+cb_text_center or android:textAlignment - only works when image weight doesn't specify. Center text in button. {format - boolean or only "center" value} <br>
 <br>
 cb_shape_radius - corner radius {format - dimension}<br>
 cb_shape_type - shape type, you can choose: rect or oval <br>
@@ -83,6 +86,7 @@ setFrameColorDisabled(int color)
 setFrameSize(float frameSize)
 removeFrame() 
 setText(String text)
+setTextCenter(boolean center)
 setTextColor(int color)
 setTextColorNormal(int color)
 setTextColorPressed(int color)

app/src/main/java/pl/sigmapoint/StartFragment.java

@@ -243,7 +243,7 @@ private void generate() {
                     break;
                 }
             }
-            generatedCB.setImage(position, getResources().getDrawable(R.drawable.ic_owl), ImageView.ScaleType.FIT_CENTER, 1, null);
+            generatedCB.setImage(position, getResources().getDrawable(R.drawable.ic_owl), ImageView.ScaleType.FIT_CENTER, 0, null);
         }
         generatedCB.setElevationEnabled(elevationTB.isChecked());
         if (getActivity() instanceof MainActivity) {

library/src/main/java/pl/sigmapoint/customview/CustomButton.java

@@ -23,6 +23,7 @@
 import android.view.Gravity;
 import android.view.View;
 import android.view.ViewGroup;
+import android.view.ViewTreeObserver;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.TextView;
@@ -108,6 +109,7 @@ public CustomButton(Context context, ViewGroup.LayoutParams params, int primaryC
         else drawablePosition = -1;
 
         setContent();
+        setButtonLayoutParams();
 
         setShapeBackground(); // set shape and backgroundColorNormal to button
         setElevationEnabled(true); // this method will work only for post-L android. Set elevation or disable it and set margins if needed
@@ -171,7 +173,7 @@ public CustomButton(Context context, AttributeSet attrs) {
             imagePaddingArray[TOP] = (int) attributes.getDimension(R.styleable.CustomButton_cb_image_padding_top, imagePadding);
             imagePaddingArray[RIGHT] = (int) attributes.getDimension(R.styleable.CustomButton_cb_image_padding_right, imagePadding);
             imagePaddingArray[BOTTOM] = (int) attributes.getDimension(R.styleable.CustomButton_cb_image_padding_bottom, imagePadding);
-            imageWeight = attributes.getInteger(R.styleable.CustomButton_cb_image_weight, 1);
+            imageWeight = attributes.getInteger(R.styleable.CustomButton_cb_image_weight, 0);
 
             if (backgroundColorState != null) { // if backgroundColorNormal state is not null the set color from color state list to specific colors
                 backgroundColorStateListToIntegers(backgroundColorState);
@@ -237,6 +239,8 @@ public CustomButton(Context context, AttributeSet attrs) {
         }
 
         setOnClickListener(this);
+
+        setButtonLayoutParams();
     }
 
     @Override
@@ -271,11 +275,14 @@ private void setContent() {
             int width = (drawablePosition % 2 == 0) ? 0 : ViewGroup.LayoutParams.MATCH_PARENT;
             int height = (drawablePosition % 2 == 0) ? ViewGroup.LayoutParams.MATCH_PARENT : 0;
             layoutParamsText = new LinearLayout.LayoutParams(width, height);
-            layoutParamsImage = new LinearLayout.LayoutParams(width, height);
+            layoutParamsImage = new LayoutParams(0, ViewGroup.LayoutParams.MATCH_PARENT);
             layoutParamsText.weight = (text != null) ? ((textWeight == 0) ? 1 : textWeight) : 0;
             textWeight = (int) layoutParamsText.weight;
-            layoutParamsImage.weight = (imageWeight == 0) ? 1 : imageWeight;
-            imageWeight = (int) layoutParamsImage.weight;
+            if (imageWeight > 0) {
+                layoutParamsImage = new LinearLayout.LayoutParams(width, height);
+                layoutParamsImage.weight = imageWeight;
+                imageWeight = (int) layoutParamsImage.weight;
+            }
             textView.setLayoutParams(layoutParamsText);
             imageContainer.setLayoutParams(layoutParamsImage);
 
@@ -489,6 +496,42 @@ private void setImageColorStateList() {
         }
     }
 
+    private void setButtonLayoutParams() {
+        if (drawableNormal != null && imageWeight == 0)
+            getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
+                @Override
+                public void onGlobalLayout() {
+                    LayoutParams layoutParams = (LayoutParams) imageContainer.getLayoutParams();
+                    float scale;
+                    if (drawablePosition == LEFT || drawablePosition == RIGHT) {
+                        scale = ((float) container.getHeight()) / ((float) drawableNormal.getIntrinsicHeight());
+                        layoutParams.width = (int) (scale * drawableNormal.getIntrinsicWidth());
+                        layoutParams.height = ViewGroup.LayoutParams.MATCH_PARENT;
+                        if (layoutParams.width > container.getWidth() / 2) {
+                            layoutParams.width = 0;
+                            layoutParams.weight = 1;
+                            imageWeight = 1;
+                        } else {
+                            if (drawablePosition == LEFT)
+                                ((LayoutParams) textView.getLayoutParams()).rightMargin = layoutParams.width;
+                            else
+                                ((LayoutParams) textView.getLayoutParams()).leftMargin = layoutParams.width;
+                        }
+                    } else {
+                        layoutParams.width = ViewGroup.LayoutParams.MATCH_PARENT;
+                        layoutParams.height = 0;
+                        layoutParams.weight = 1;
+                        imageWeight = 1;
+                    }
+                    imageContainer.setLayoutParams(layoutParams);
+                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN)
+                        getViewTreeObserver().removeOnGlobalLayoutListener(this);
+                    else
+                        getViewTreeObserver().removeGlobalOnLayoutListener(this);
+                }
+            });
+    }
+
     private Drawable changeDrawableColor(Bitmap bitmap, int color) {
         BitmapShader shader = new BitmapShader(bitmap, Shader.TileMode.REPEAT, Shader.TileMode.REPEAT);
         Paint paint = new Paint();
@@ -757,6 +800,7 @@ public void setImage(int position, Drawable drawableNormal, Drawable drawablePre
             imageContainer.setScaleType(scaleType);
 
         setContent();
+        setButtonLayoutParams();
     }
 
     /**