( 轉 ) Android自繪字體大小paint.settextsize隨分辨率大小變化

1.獲取當前設備的屏幕大小

DisplayMetrics displayMetrics = new DisplayMetrics();
this.getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);

2.計算與你開發時設定的屏幕大小的縱橫比(這里假設你開發時定的屏幕大小是480*800)

int screenWidth = displayMetrics.widthPixels;
int screenHeight = displayMetrics.heightPixels;
float ratioWidth = (float)screenWidth / 480;
float ratioHeight = (float)screenHeight / 800;

RATIO = Math.min(ratioWidth, ratioHeight);
if (ratioWidth != ratioHeight) {
    if (RATIO == ratioWidth) {
    OFFSET_LEFT = 0;
    OFFSET_TOP = Math.round((screenHeight - 800 * RATIO) / 2);
    }else {
    OFFSET_LEFT = Math.round((screenWidth - 480 * RATIO) / 2);
    OFFSET_TOP = 0;
    }
}

3.根據上一步計算出來的最小縱橫比來確定字體的大小(假定在480*800屏幕下字體大小設定為35)

public static int TEXT_SIZE = Math.round(35 * RATIO);

4.根據上一步計算的字體大小來設定應用程序中字體的大小

Paint paint = new Paint();
paint.setTextSize(TEXT_SIZE);

 

canvas.drawText("test", 0, 0, paint);
from：http://blog.csdn.net/cq361106306/article/details/38400647