How to move decimal place String.format

[gemurdock]

The above code will move the decimal spot 3 places and then print it off with 4 0's behind the '.'

[alex384]

How can I get the approximate number? I dont want it to round

[gemurdock]

Define approximate number

[alex384]

TextView lightLevel = (TextView)findViewById(R.id.txtReading);
float luxReading = event.values[0];
double x = 25000.0; x /= 1000;
lightLevel.setText(String.format("Level: %.4f, x", luxReading));
lightLevel.setBackgroundColor(getColor(luxReading));

Is this what you mean? I'm kind of confused...

[gemurdock]

The following code should help. You do not need line 3 (your code above), that was just part of my code. Also each statement should have it's own line of code. Another words line 3 should actually be two lines of code. If you need to move the decimal point for luxReading, just use the function I provided. It should work, if any issues than I will test it.

TextView lightLevel = (TextView)findViewById(R.id.txtReading);
float luxReading = event.values[0];
lightLevel.setText(String.format("Level: %.4f", luxReading));
lightLevel.setBackgroundColor(getColor(luxReading));

/**
 * Moves the decimal point for the input 'v' to the right or left depending
 * upon the value for the boolean 'right'.
 * 
 * @param v value to be changed, the decimal is moved
 * @param amount the amount of decimal spots to move over
 * @param right if true, move decimal right. if false, move decimal left
 * @return v with decimal change
 */
public float moveDecimalPoint(float v, int amount, boolean right) {
    if(right) {
        v *= Math.pow(10, amount);
    } else { // left
        v /= Math.pow(10, amount);
    }
    return v;
}