使用Java在Android中更改XML样式资源

Question

I have most of my elements in the UI referencing a style resource for font size, size, color, etc. Would it be possible to change the value of one of these <item> 's dynamically? I was hoping to get the physical dimensions of the screen and change the size so that it takes up roughly the same percentage of the screen with different screen sizes. <item name="android:textSize">12dp</item> would go to <item name="android:textSize">15dp</item>

Answer 1

you mean that you want to apply styles for different screen sizes.

look this: http://developer.android.com/guide/practices/screens_support.html

that will help you.

After a few researches, I've found a possible answer so far.

// declaring resources
int mHeight;
int mWidth;
/* I am considering a TextView, if you want,
 * you can apply it for any widget you like. */
TextView mTextView = (TextView)findViewById(R.id.your_textview_id);

/* right. now we want to get the screen dimensions. */
Display mDisplay = getWindowManager().getDefaultDisplay();
mHeight = mDisplay.getHeight();
mWidth = mDisplay.getWidth();

/* now we have the values that needed.
 * the next thing to do is mathematical operation.
 * do this as you wish. the thing I do is obtain a
 * value that the mHeight is subtracted by mWidth and divided by 2. */
float mTextSize = (float) (mHeight - mWidth) / 2;

// apply it as text size of the TextView.
mTextView.setTextSize(mTextSize);