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com.android.launcher.permission.READ_SETTINGS或者com.android.launcher.permission.WRITE_SETTINGS
然后我就添加了权限，虽然是可以判断了，但是小米，HTC等手机都不能正常使用，这时候突然发现了网上了一段代码，才明白了网友们的想法，现在就来简单分析下，并做出优化。
String url = "content://" + authority + "/favorites?notify=true";
其实判断快捷方式也就是根据这个ContentProvider来判断。但是我们并不知道这个authority，那么怎么知道呢？查询，根据PackageManager得到ProviderInfo，然后判断ProviderInfo的读写权限是否包含com.android.launcher.permission.READ_SETTINGS或者com.android.launcher.permission.WRITE_SETTINGS。
至此原理我们已经明白了。
public static boolean hasShortcut(Context context, String appName) {
String readSettingsPermission = "com.android.launcher.permission.READ_SETTINGS";
String authority = getAuthorityFromPermission2(context, readSettingsPermission);
String url = "content://" + authority + "/favorites?notify=true";
final Uri CONTENT_URI = Uri.parse(url);
Cursor c = context.getContentResolver().query(CONTENT_URI, null, " title= ? ", new String[] { appName }, null);
if (c != null && c.moveToNext()) {
return true;
}
return false;
}
@SuppressLint("NewApi")
private static String getAuthorityFromPermission2(Context context, String permission) {
List<PackageInfo> packs = context.getPackageManager().getInstalledPackages(PackageManager.GET_PROVIDERS);
if (packs != null) {
for (PackageInfo pack : packs) {
ProviderInfo[] providers = pack.providers;
if (providers != null) {
for (ProviderInfo provider : providers) {
if (permission.equals(provider.readPermission))
return provider.authority;
if (permission.equals(provider.writePermission))
return provider.authority;
}
}
}
}
return null;
} public static boolean hasShortcut(Context context, String appName) {
String readSettingsPermission = "com.android.launcher.permission.READ_SETTINGS";
String authority = getAuthorityFromPermission1(context, readSettingsPermission);
String url = "content://" + authority + "/favorites?notify=true";
final Uri CONTENT_URI = Uri.parse(url);
Cursor c = context.getContentResolver().query(CONTENT_URI, null, " title= ? ", new String[] { appName }, null);
if (c != null && c.moveToNext()) {
return true;
}
return false;
}
private static String getAuthorityFromPermission1(Context context, String permission) {
ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
List<RunningAppProcessInfo> appProcessInfos = am.getRunningAppProcesses();
for (int i = 0; i < appProcessInfos.size(); i++) {
RunningAppProcessInfo appInfo = appProcessInfos.get(i);
List<ProviderInfo> info = context.getPackageManager().queryContentProviders(appInfo.processName, appInfo.uid, PackageManager.GET_PROVIDERS);
if (info != null) {
for (int j = 0; j < info.size(); j++) {
ProviderInfo provider = info.get(j);
if (permission.equals(provider.readPermission)) {
return provider.authority;
}
if (permission.equals(provider.writePermission)) {
return provider.authority;
}
}
}
}
return null;
}【Android】判断快捷方式是否存在的原理——优化网上通用的(速度提升10倍)
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原文地址：http://blog.csdn.net/windowsxp2014/article/details/46138053
