Android SeekBar设置进度值

问题描述

每当我单击按钮时，我都希望更改SeekBar进度.使用setProgress()仅适用于初始值.如果在进行一些更改后使用它，则会引发错误.

I want the SeekBar progress to change whenever I click a button. Using setProgress() works only for initial value. It throws an error if I use it after some changes.

推荐答案

也许您应该尝试使用处理程序?我在我的一个应用程序中使用了它，并且工作正常.

Perhaps you should try to use a handler? I use this in an app of mine and works fine.

1)创建SeekBar时:

1) When creating your SeekBar:

// ...
seekBarHandler = new Handler(); // must be created in the same thread that created the SeekBar
seekBar = (SeekBar) findViewById(R.id.my_seekbar);
// you should define max in xml, but if you need to do this by code, you must set max as 0 and then your desired value. this is because a bug in SeekBar (issue 12945) (don't really checked if it was corrected)
seekBar.setMax(0);
seekBar.setMax(max);
seekBar.setProgress(progress);
// ...

2)单击您的按钮

// ...
seekBarHandler.post(new Runnable() {
    @Override
    public void run() {
        if (seekBar != null) {
            seekBar.setMax(0);
            seekBar.setMax(max);
            seekBar.setProgress(newProgress);
        }
    }
});
// ...

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