Android - How to get the currently "focused" object?-CodePudding

I want to let a Button identify which of my TextViews got the current focus. And after that the Button needs to apply changes to the focused TextView.

    TextView textView11 = (TextView) findViewById(R.id.frame1_1);

    textView11.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            textView11.setBackgroundColor(Color.LTGRAY);
            textView11.setFocusableInTouchMode(true);
            textView11.requestFocus();
        }
    });

    MaterialButton pb1 = (MaterialButton) findViewById(R.id.pin_button_1);
    pb1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            //1. get the focused textview or scan for the focused textView
            
            //2. apply button function to the focused textView

        }

    });

So how can i identify here

//1. get the focused textview or scan for the focused textView

which TextView has the focus currently? I think it might be possible with some help variable but maybe there os another way, because then i still need a onClickListener for each of the 22 TextView

CodePudding user response：

You can simply place these TextView in the same ViewGroup, then just traverse the ViewGroup's child views like this:

for (child in container.children){
    if (child.isFocused){
        //do your jobs here
    }
}

CodePudding user response：

Untested but should work

private TextView hasFocusTextView;
private View.OnFocusChangeListener onFocusChangedListener = new View.OnFocusChangeListener() {
    @Override
    public void onFocusChange(View v, boolean hasFocus) {
        if (hasFocus)
            hasFocusTextView = (TextView) v;
    }
};

TextView textView11 = (TextView) findViewById(R.id.frame1_1);
//Use same listener on all textview you want to include with the focus logic
textView11.setOnFocusChangeListener(onFocusChangedListener); 

pb1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            hasFocusTextView.setText("Changing text of the focused TextView");
        }

});

CodePudding user response：

Best way is to use a variable to store which TextView currently has focus.

TextView currentTextView = null;

void initView() {
    TextView textView11 = (TextView) findViewById(R.id.frame1_1);

    textView11.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            textView11.setBackgroundColor(Color.LTGRAY);
            textView11.setFocusableInTouchMode(true);
            textView11.requestFocus();

            // Set the currentTextView to the currently focused
            // this must be used in every focusable textview
            currentTextView = (TextView) view;
        }
    });

    MaterialButton pb1 = (MaterialButton) findViewById(R.id.pin_button_1);
    pb1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            //1. get the focused textview or scan for the focused textView
            
            // focused textview is currentTextView

            //2. apply button function to the focused textView

            // use the variable currentTextView
        }

    });
}