[mw_shl_code=java,true]public static float applyDimension(int unit, float value, DisplayMetrics metrics) {
switch (unit) {
case COMPLEX_UNIT_PX:
return value;
case COMPLEX_UNIT_DIP:
return value * metrics.density;
case COMPLEX_UNIT_SP:
return value * metrics.scaledDensity;
case COMPLEX_UNIT_PT:
return value * metrics.xdpi * (1.0f/72);
case COMPLEX_UNIT_IN:
return value * metrics.xdpi;
case COMPLEX_UNIT_MM:
return value * metrics.xdpi * (1.0f/25.4f);
}
return 0;
}[/mw_shl_code]
從代碼中可以看到pt轉px和sp轉px的方法,所以轉換成px再轉成sp就可以了,可以自己寫個方法壹次轉換啦:
[mw_shl_code=java,true]value * metrics.xdpi * (1.0f/72) / metrics.scaledDensity = value * metrics.xdpi * (1.0f/(72 * metrics.scaledDensity);[/mw_shl_code]
不然先算出px再從px算pt的話有兩次精度損失。