我一直在到处找这样一个具体的例子，不能在网上找到的任何地方。

I've been looking all over for a specific example of this and couldn't find it online anywhere.

我想要做的就是：我的应用程序，点击一个按钮，并移动到我的应用程序的动态壁纸preVIEW动态壁纸，让用户可以选择将其激活。

What I want to do is: From my app click a button and move to the Live Wallpaper preview of my apps live wallpaper, so the user can choose to activate it.

现在的我已经在网上看了，我用WallpaperManager's ACTION_CHANGE_LIVE_WALLPAPER与EXTRA_LIVE_WALLPAPER_COMPONENT指着我LiveWallpapers组件名称。

Now of what I've read online, I'm to use WallpaperManager's ACTION_CHANGE_LIVE_WALLPAPER with EXTRA_LIVE_WALLPAPER_COMPONENT pointing to my LiveWallpapers ComponentName.

下面是一个什么样我到目前为止我的code。任何人都知道我在做什么错了？截至目前我按一下按钮，没有任何反应......（我记录它，它实际上是实现这一code）。

Here's my code of what I have so far. Anybody know what I'm doing wrong? As of now I click the button and nothing happens... (I logged it and it's actually reaching this code).

Intent i = new Intent();
i.setAction(WallpaperManager.ACTION_CHANGE_LIVE_WALLPAPER);
i.putExtra(WallpaperManager.EXTRA_LIVE_WALLPAPER_COMPONENT, "com.example.myapp.livewallpaper.LiveWallpaperService");
startActivity(i);

如果您需要任何更多的信息，我忘了后让我知道。

If you need any more info that I forgot to post let me know.

*我也知道这是API 16+，这只是我的情况的时候，手机是API 16 +

*I am also aware this is API 16+, this is just my case for when the phone is API 16+

推荐答案

我找不到一个例子无论是。我注意到的第一件事是， EXTRA_LIVE_WALLPAPER_COMPONENT 不需要一个字符串，但组件名。我先用组件名切割是这样的：

I couldn't find an example either. The first thing I noticed was that the EXTRA_LIVE_WALLPAPER_COMPONENT doesn't require a String, but a ComponentName. My first cut with ComponentName looked like this:

ComponentName component = new ComponentName(getPackageName(), "LiveWallpaperService");
intent = new Intent(WallpaperManager.ACTION_CHANGE_LIVE_WALLPAPER);
intent.putExtra(WallpaperManager.EXTRA_LIVE_WALLPAPER_COMPONENT, component);
startActivityForResult(intent, REQUEST_SET_LIVE_WALLPAPER);

这并没有削减它，所以我挖成Android源$ C ​​$ C，发现以下 LiveWallpaperChange.java ：

That didn't cut it, so I dug into the Android source code and found the following in LiveWallpaperChange.java:

Intent queryIntent = new Intent(WallpaperService.SERVICE_INTERFACE);
queryIntent.setPackage(comp.getPackageName());
List<ResolveInfo> list = getPackageManager().queryIntentServices( queryIntent, PackageManager.GET_META_DATA);

一个小调试上述块，这是我的最终形式......

A little debugging with the above chunk, and this is my final form...

ComponentName component = new ComponentName(getPackageName(), getPackageName() + ".LiveWallpaperService");
intent = new Intent(WallpaperManager.ACTION_CHANGE_LIVE_WALLPAPER);
intent.putExtra(WallpaperManager.EXTRA_LIVE_WALLPAPER_COMPONENT, component);
startActivityForResult(intent, REQUEST_SET_LIVE_WALLPAPER);

关键的是在第二个参数组件名。

从技术上讲，我的最终形式支持新方法的等级第一，其次是旧的，随后的Nook平板电脑/ Nook Color的具体意图：

Technically, my final form supports a hierarchy of the new method first, followed by the old, followed by the Nook Tablet/Nook Color specific intent:

Intent intent;

// try the new Jelly Bean direct android wallpaper chooser first
try {
    ComponentName component = new ComponentName(getPackageName(), getPackageName() + ".LiveWallpaperService");
    intent = new Intent(WallpaperManager.ACTION_CHANGE_LIVE_WALLPAPER);
    intent.putExtra(WallpaperManager.EXTRA_LIVE_WALLPAPER_COMPONENT, component);
    startActivityForResult(intent, REQUEST_SET_LIVE_WALLPAPER);
} 
catch (android.content.ActivityNotFoundException e3) {
    // try the generic android wallpaper chooser next
    try {
        intent = new Intent(WallpaperManager.ACTION_LIVE_WALLPAPER_CHOOSER);
        startActivityForResult(intent, REQUEST_SET_LIVE_WALLPAPER);
    } 
    catch (android.content.ActivityNotFoundException e2) {
        // that failed, let's try the nook intent
        try {
            intent = new Intent();
            intent.setAction("com.bn.nook.CHANGE_WALLPAPER");
            startActivity(intent);
        }
        catch (android.content.ActivityNotFoundException e) {
            // everything failed, let's notify the user
            showDialog(DIALOG_NO_WALLPAPER_PICKER);
        }
    }
}