改变进度条为双 [英] change progress bar into double

问题描述

进度条：

ProgressBar pb = (ProgressBar) findViewById(R.id.progressbar);
pb.setProgress(0);
int k = (int)max;
pb.setMax(k);
int j = (int)(cost);
pb.setProgress(j);

这code的进度条，只需要我想改变code采取双重价值int值

this code for a progress bar that only take an int value i want to change the code to take a double value

推荐答案

您不能。在进度部件只接受整数其最大和目前的进展。你无法控制的最低，因为它始终是 0 。

You can't. The ProgressBar widget only accepts ints for its max and current progress. You can't control the minimum, as it is always 0.

您可以用10的幂，使得小数消失乘以你需要的最大和目前的进展值。在进度仍将显示进度相同数量，因为它会用十进制值，因为进步是 CurrentValue的/ maxValue（最大值）。正如你将用同样数量乘以两者的比例是相等的。例如：

You could multiply your required maximum and current progress values by a power of 10, such that the decimal goes away. The ProgressBar will still show the same amount of progress as it would with a decimal value, as the progress is a ratio of currentValue/maxValue. As you'll be multiplying both by the same number, the ratios are equal. For example:

0.1/10 = 0.01

然而，如果你无论多在0.1和10×10摆脱了小数，你就会得到：

However, if you multiple both 0.1 and 10 by 10 to get rid of the decimal, you get:

1/100 = 0.01 //Same result

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