android 代码获取dimens,Android dimens读取

重新总结,对于dp和sp来说,这几个函数效果一样,不过对于px来说就不一样啦,评论里说的很对.

10.5px

10.5dp

10.5sp

float px1= getResources().getDimension(R.dimen.d_px10_5);

int px2= getResources().getDimensionPixelOffset(R.dimen.d_px10_5);

int px3= getResources().getDimensionPixelSize(R.dimen.d_px10_5);

L.d(TAG," d_px10_5 getDimension = "+px1);

L.d(TAG," d_px10_5 getDimensionPixelOffset = "+px2);

L.d(TAG," d_px10_5 getDimensionPixelSize = "+px3);

float dp1= getResources().getDimension(R.dimen.d_dp10_5);

int dp2= getResources().getDimensionPixelOffset(R.dimen.d_dp10_5);

int dp3= getResources().getDimensionPixelSize(R.dimen.d_dp10_5);

L.d(TAG," d_dp10_5 getDimension = "+dp1);

L.d(TAG," d_dp10_5 getDimensionPixelOffset = "+dp2);

L.d(TAG," d_dp10_5 getDimensionPixelSize = "+dp3);

float sp1= getResources().getDimension(R.dimen.d_sp10_5);

int sp2= getResources().getDimensionPixelOffset(R.dimen.d_sp10_5);

int sp3= getResources().getDimensionPixelSize(R.dimen.d_sp10_5);

L.d(TAG," d_sp10_5 getDimension = "+sp1);

L.d(TAG," d_sp10_5 getDimensionPixelOffset = "+sp2);

L.d(TAG," d_sp10_5 getDimensionPixelSize = "+sp3);

输出

E: d_px10_5 getDimension = 10.5

E: d_px10_5 getDimensionPixelOffset = 10

E: d_px10_5 getDimensionPixelSize = 11

E: d_dp10_5 getDimension = 42.0

E: d_dp10_5 getDimensionPixelOffset = 42

E: d_dp10_5 getDimensionPixelSize = 42

E: d_sp10_5 getDimension = 42.0

E: d_sp10_5 getDimensionPixelOffset = 42

E: d_sp10_5 getDimensionPixelSize = 42

转换

/**

* dp转换成px

*/

public static int dp2px(Context context,float dpValue){

float scale=context.getResources().getDisplayMetrics().density;

return (int)(dpValue*scale+0.5f);

}

/**

* px转换成dp

*/

public static int px2dp(Context context,float pxValue){

float scale=context.getResources().getDisplayMetrics().density;

return (int)(pxValue/scale+0.5f);

}

/**

* sp转换成px

*/

public static int sp2px(Context context,float spValue){

float fontScale=context.getResources().getDisplayMetrics().scaledDensity;

return (int) (spValue*fontScale+0.5f);

}

/**

* px转换成sp

*/

public static int px2sp(Context context,float pxValue){

float fontScale=context.getResources().getDisplayMetrics().scaledDensity;

return (int) (pxValue/fontScale+0.5f);

}