查询手机内所有支持分享的应用

/**
* 查询手机内所有支持分享的应用
* @param context
* @return
*/
public static List<ResolveInfo> getShareApps(Context context){
List<ResolveInfo> mApps = new ArrayList<ResolveInfo>();
Intent intent=new Intent(Intent.ACTION_SEND,null);
intent.addCategory(Intent.CATEGORY_DEFAULT);
intent.setType("text/plain");
PackageManager pManager = context.getPackageManager();
mApps = pManager.queryIntentActivities(intent,PackageManager.COMPONENT_ENABLED_STATE_DEFAULT);

return mApps;
}

由于该方法，返回的并不是 PackageInfo 对象。而是 ResolveInfo。因此获取图片、应用名、包名的方法不一样，如下：
PackageManager pManager = MessageSendActivity.this.getPackageManager();

/*********************查询手机内所有支持分享的应用*********************/
List<ResolveInfo> resolveList = Utils.getShareApps(MessageSendActivity.this);

for(int i=0;i<resolveList.size();i++) {
ResolveInfo resolve = resolveList.get(i);
ShareItemInfo shareItem = new ShareItemInfo();
//set Icon
shareItem.setIcon(resolve.loadIcon(pManager));
//set Application Name
shareItem.setLabel(resolve.loadLabel(pManager).toString());
//set Package Name
shareItem.setPackageName(resolve.activityInfo.packageName);

}

总结：

通过 PackageInfo 获取具体信息方法：

包名获取方法：packageInfo.packageName

icon获取获取方法：packageManager.getApplicationIcon(applicationInfo)

应用名称获取方法：packageManager.getApplicationLabel(applicationInfo)

使用权限获取方法：packageManager.getPackageInfo(packageName,PackageManager.GET_PERMISSIONS)

.requestedPermissions

通过 ResolveInfo 获取具体信息方法：

包名获取方法：resolve.activityInfo.packageName

icon获取获取方法：resolve.loadIcon(packageManager)

应用名称获取方法：resolve.loadLabel(packageManager).toString()