I create programmatically like horizontalview then, how to pass AttributeSet in programmatically.
My constructor looks like this:
public HorizontalListView(Context context, AttributeSet attrs) { super(context, attrs); }
I have try this:
mHlvSimpleList= new HorizontalListView(mcontext,R.style.niceview);
Error:
The constructor HorizontalListView(Context, int) is undefined
in style.xml
<style name="niceview"> <item name="android:layout_width">wrap_content</item> <item name="android:layout_height">wrap_content</item> </style>
How to pass AttributeSet in horizontalistview constructor matching parameter?
The constructor with Context
and AttributeSet
is used when your view is inflated from xml. You shouldn't use it to create object. You should use constructor with Context
as param.
AttributeSet
is interface and you can create instance of then and implement all method as is shown below:
AttributeSet attrs = new AttributeSet(){ @Override public int getAttributeCount() { return 0; } @Override public String getAttributeName(int index) { return null; } @Override public String getAttributeValue(int index) { return null; } @Override public String getAttributeValue(String namespace, String name) { return null; } @Override public String getPositionDescription() { return null; } @Override public int getAttributeNameResource(int index) { return 0; } @Override public int getAttributeListValue(String namespace, String attribute, String[] options, int defaultValue) { return 0; } @Override public boolean getAttributeBooleanValue(String namespace, String attribute, boolean defaultValue) { return false; } @Override public int getAttributeResourceValue(String namespace, String attribute, int defaultValue) { return 0; } @Override public int getAttributeIntValue(String namespace, String attribute, int defaultValue) { return 0; } @Override public int getAttributeUnsignedIntValue(String namespace, String attribute, int defaultValue) { return 0; } @Override public float getAttributeFloatValue(String namespace, String attribute, float defaultValue) { return 0; } @Override public int getAttributeListValue(int index, String[] options, int defaultValue) { return 0; } @Override public boolean getAttributeBooleanValue(int index, boolean defaultValue) { return false; } @Override public int getAttributeResourceValue(int index, int defaultValue) { return 0; } @Override public int getAttributeIntValue(int index, int defaultValue) { return 0; } @Override public int getAttributeUnsignedIntValue(int index, int defaultValue) { return 0; } @Override public float getAttributeFloatValue(int index, float defaultValue) { return 0; } @Override public String getIdAttribute() { return null; } @Override public String getClassAttribute() { return null; } @Override public int getIdAttributeResourceValue(int defaultValue) { return 0; } @Override public int getStyleAttribute() { return 0; } };
And use it
TextView textView = new TextView(this, attrs);
but it is not correct way.
You should use methods from your view to set properties of view.
For example to set LayoutParams is two way to do this
First by method setLayoutParams()
view.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
The second when you added your view to ViewGroup;
viewGroup.addView(yourView, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
When you have or you want to add your view to for example to RelativeLayout
you should use LayoutParams
relevant for this ViewGroup. It is RelativeLayout.LayoutParams
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