Highlight TextView when clicked programmatically

Question

I dynamically generate TextViews which work like buttons. Now i want to highlight them when they get pressed. Something like change Text color or background color. I have tried to use selector, but it doesn't work.

<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_focused="true" android:color="#ffffff"/>
<item android:state_pressed="true" android:state_enabled="false" android:color="#ffffff" />
</selector>

Here my loop for creating the TextViews.

int z = 0;
    for (MOKGenericDataItem d : data) {
        if (d.getButtonText() != null) {
            final int pagePosition = z;
            TextView btn = new TextView(getActivity());
            btn.setId(z);
            final int id_ = btn.getId();
            btn.setText(d.getButtonText());
            btn.setTextSize(TypedValue.COMPLEX_UNIT_SP, 30);
            btn.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT, 1f));
            btn.setGravity(Gravity.CENTER);

            mLineareLayoutViewPagerButtons.addView(btn);

            btn1 = ((TextView) view.findViewById(id_));
            btn1.setOnClickListener(new View.OnClickListener() {
                public void onClick(View view) {
                    mViewPager.setCurrentItem(pagePosition,false);
                }
            });
        }
        z++;
    }

Answer 1

First of all your this line is creating ambiguity as you are taking a variable name as btn1 (which is relating it to button)and you are taking a reference of TextView,

 btn1 = ((TextView) view.findViewById(id_));

Anyways,Go step by step,

• create an xml like label_bg.xml like the following in the drawable folder:

   <?xml version="1.0" encoding="utf-8"?>
      <selector xmlns:android="http://schemas.android.com/apk/res/android">
          <item android:drawable="@drawable/pressed_color"
                android:state_pressed="true" />    
          <item android:drawable="@drawable/normal_color" />
      </selector>
  

• In values folder create another xml like the following,named as labelcolors.xml

   <?xml version="1.0" encoding="utf-8"?>
  <resources>
  <drawable name="pressed_color">#7ec0ee</drawable> <!--custom color for pressed state -->
  <drawable name="normal_color">#00FFFFFF</drawable> <!--transperent color for normal state -->
  </resources>
  

• Now set the background of the label as label_bg.xml

    <TextView
      android:id="@+id/yourlabel"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_marginLeft="760dp"
      android:layout_marginTop="515dp"
      android:background="@drawable/label_bg"   <!--like this-->
      android:text="LabelText"
      android:textSize="20dp" />
  

---

as you are dynamically adding the views so you need to set the background for your each textView programatically .For that call setBackgroundResource() on the textview object created and set label.xml as background

Answer 2

You need to create a class implements with OnTouchListener and Detect touch Motin. ACTION_DOWN, change text color and ACTION_UP change it's default color according to your requirement.

Code:

public class CustomTouchListener implements View.OnTouchListener {
    public boolean onTouch(View view, MotionEvent motionEvent) {
        switch (motionEvent.getAction()) {
        case MotionEvent.ACTION_DOWN:
            ((TextView) view).setTextColor(0xFFFFFFFF); // white
            break;
        case MotionEvent.ACTION_CANCEL:
        case MotionEvent.ACTION_UP:
            ((TextView) view).setTextColor(Color.parseColor("#4a4a4a")); // lightblack
            break;
        }
        return false;
    }
}

Now set TouchListener using

textView.setOnTouchListener(new CustomTouchListener());