Tiled drawable sometimes stretches

最新推荐文章于 2024-09-02 07:27:49 发布

swust_chenpeng

最新推荐文章于 2024-09-02 07:27:49 发布

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本文提供了解决Android ListView中瓷砖背景图偶发拉伸为整个列表项的问题的方法，包括一个实用的修复函数和可能的原因分析。

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43 down vote favorite

I have a ListView whose items have a tiled background. To accomplish this, I use the following drawable xml:

<bitmap
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:src="@drawable/tile"
    android:tileMode="repeat" />

Usually, this works. Sometimes, however, the src drawable isn't tiled, but stretched to fill the entire list item. (I've got several different tiles like this, and I use them mixed in one ListView. If there is stretching instead of tiling, it's never been in all of them at once, for what that's worth.)

I also tried to add android:dither="true" to that xml, since I read somewhere that without it there might be bugs. That didn't change anything.

up vote 24 down vote

I also got bitten by this problem. Very hard to diagnose, even harder to find similar reports and usable solutions.

"Tapas" on the freenode #android-dev irc channel came with the following utility method:

public static void fixBackgroundRepeat(View view) {
    Drawable bg = view.getBackground();
    if (bg != null) {
        if (bg instanceof BitmapDrawable) {
            BitmapDrawable bmp = (BitmapDrawable) bg;
            bmp.mutate(); // make sure that we aren't sharing state anymore
            bmp.setTileModeXY(TileMode.REPEAT, TileMode.REPEAT);
        }
    }
}

Apply it to all Views that have a tiled background set (e.g. findViewById them).

Also, I have the impression this bug started acting up after setting "anyDensity=true" in AndroidManifest.xml

Thanks, it helped, at least for now. – jki Apr 16 '12 at 18:53

This solution works. Thank you :) – dineth Jun 14 '12 at 0:35

How do I apply it to a drawable defined in xml? I use this drawable within a <selector > – Kirill Kulakov Jan 31 '13 at 13:56

This solution works for me too, but view background was not set strangely so I have to add view.setBackgroundResource(R.drawable.bg_striped_img); before view.getBackground(); . Thank you :) – letroll Mar 11 '13 at 12:26

Thanks,it works for me – penghaitao Aug 30 '13 at 2:29

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43 down vote favorite

I have a ListView whose items have a tiled background. To accomplish this, I use the following drawable xml:

<bitmap
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:src="@drawable/tile"
    android:tileMode="repeat" />

I also tried to add android:dither="true" to that xml, since I read somewhere that without it there might be bugs. That didn't change anything.

http://stackoverflow.com/questions/4336286/tiled-drawable-sometimes-stretches/5852198#5852198