android - 为什么动态创建的SeekBar不带我的颜色？

Question

我必须在运行时创建具有主要和次要进度的 SeekBar。看着tileify function我应该如何对待 LayerDrawable 和 progress_horizontal_holo_dark.xml对于正确的 ID，我想出了以下内容:

    // parent view
    LinearLayout parent = (LinearLayout) findViewById(R.id.parent);

    // create widget
    LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
            RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);

    SeekBar seekBar = new SeekBar(this);
    seekBar.setLayoutParams(params);

    // set bg resources
    Drawable background = getResources().getDrawable(R.drawable.scrubber_track_holo_light);
    ScaleDrawable primary = new ScaleDrawable(getResources().getDrawable(R.drawable.scrubber_primary_holo), 0x10|0x03, 100.0f, 100);

    ScaleDrawable secondary = new ScaleDrawable(getResources().getDrawable(R.drawable.scrubber_secondary_holo), 0x100x03, 100.0f, 85);

    LayerDrawable layerDrawable = new LayerDrawable(new Drawable[] { background, secondary, primary});
    layerDrawable.setId(0, android.R.id.background);
    layerDrawable.setId(1, android.R.id.secondaryProgress);
    layerDrawable.setId(2, android.R.id.progress);

    seekBar.setBackgroundDrawable(layerDrawable);
    seekBar.setThumb(getResources().getDrawable(R.drawable.seekbar_btn));

    // set values
    seekBar.setMax(50);
    seekBar.setSecondaryProgress(25);
    seekBar.setProgress(15);
    parent.addView(seekBar);  

SeekBar 应该是这样的:

这是我的资源文件:

- scrubber_primary_holo.9.png
- scrubber_secondary_holo.9.png

问题:

• setProgressDrawable(layerDrawable) 没有按预期工作。我在 XML 代码中使用这个函数，但如果我在运行时使用它，我会得到如下图所示的结果。

有什么想法吗？

Answer 1

如果其他人遇到同样的问题，我找到了解决方案。有两个问题。第一个是 ScaleBitmap 虽然在 XML 中使用但不能从代码中使用。我不得不使用 ClipDrawable。第二个问题是显示主要和次要进度 - 它们在第一次进度更改后显示。这是通过先将seekBar添加到parent view然后设置primary和secondary progress来解决的。您可以在下面查看源代码。干杯!

    // CREATE WIDGET
    LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
            RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);

    SeekBar seekBar = new SeekBar(this, null, android.R.attr.seekBarStyle);
    seekBar.setLayoutParams(params);
    parent.addView(seekBar);

    seekBar.setMax(50);
    seekBar.setProgress(15);
    seekBar.setSecondaryProgress(25);


    // CREATE PROGRESS BAR
    LayerDrawable layerDrawable = (LayerDrawable) seekBar.getProgressDrawable();
    seekBar.setThumb(getResources().getDrawable(R.drawable.seekbar_btn));

    Drawable progress = (Drawable) layerDrawable.findDrawableByLayerId(android.R.id.progress);
    Bitmap progressBmp = BitmapFactory.decodeResource(getResources(), R.drawable.scrubber_secondary_holo);
    progress = new ClipDrawable(new BitmapDrawable(getResources(), progressBmp), Gravity.AXIS_PULL_BEFORE, ClipDrawable.HORIZONTAL);
    layerDrawable.setDrawableByLayerId(android.R.id.progress, progress);

    Drawable secondary = (Drawable) layerDrawable.findDrawableByLayerId(android.R.id.secondaryProgress);
    Bitmap secondaryBmp = BitmapFactory.decodeResource(getResources(), R.drawable.scrubber_primary_holo);
    secondary = new ClipDrawable(new BitmapDrawable(getResources(), secondaryBmp), Gravity.AXIS_PULL_BEFORE, ClipDrawable.HORIZONTAL);
    layerDrawable.setDrawableByLayerId(android.R.id.secondaryProgress, secondary);

    Drawable background = (Drawable) layerDrawable.findDrawableByLayerId(android.R.id.background);
    Bitmap backgroundBmp = BitmapFactory.decodeResource(getResources(), R.drawable.scrubber_track_holo_light);
    background = new BitmapDrawable(getResources(), backgroundBmp);
    layerDrawable.setDrawableByLayerId(android.R.id.background, background);