您好，我一定很累，因为我似乎无法完成这项工作，在我看来，这是有道理的。我有一个String[]完整的Android应用程序的名字，我想筛选出来之前，我将结果写入一个JSONArray。
public static JSONArray appInfo = new JSONArray();
public static String[] ignoreList = {"Google", "Maps", "Settings", "Phone", "Chrome", "Photos", "Duo", "YouTube", "Gmail", "Contacts", "Drive", "Clock", "Messages", "Files", "Calculator", "File manager", "Samsung", "Gallery", "LastPass", "OnePlus", "Weather"};
public void listApps(Context c) {
PackageManager pm = c.getPackageManager();
Intent main = new Intent(Intent.ACTION_MAIN, null);
main.addCategory(Intent.CATEGORY_LAUNCHER);
List<ResolveInfo> packages = pm.queryIntentActivities(main, 0);
for (ResolveInfo resolve_info : packages) {
try {
String package_name = resolve_info.activityInfo.packageName;
String app = (String) pm.getApplicationLabel(pm.getApplicationInfo(package_name, PackageManager.GET_META_DATA));
for (String tempStr : ignoreList) {
if (!app.contains(tempStr)) {
JSONObject json = new JSONObject(); // Create temp json object with app info.
json.put("app", app);
appInfo.put(json);
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
try {
Log.d("Debug", appInfo.toString(4));
} catch (JSONException e) {
e.printStackTrace();
}
}
如果我要检查；
if (!app.contains("Google")) {
然后，我JSONArray将不包含带有“ Google”的应用名称，但是当我遍历时，ignoreList我得到了以下信息JSON，即不是来自ignoreList不在？中的其余项目ignorList？还不断重复对象吗？任何帮助将非常欢迎。
{
"app": "Chrome"
},
{
"app": "Chrome"
},
{
"app": "Chrome"
},
{
"app": "Chrome"
},
{
"app": "Chrome"
},
{
"app": "Chrome"
},
{
"app": "Chrome"
},
{
"app": "Chrome"
},
{
"app": "Chrome"
},
{
"app": "Chrome"
},
{
"app": "Chrome"
},
{
"app": "Chrome"
},
{
"app": "Chrome"
},
{
"app": "Chrome"
},
{
"app": "Chrome"
},
{
"app": "Chrome"
},
{
"app": "Chrome"
},
{
"app": "Chrome"
},
{
"app": "Chrome"
},
{
"app": "Chrome"
},
{
"app": "Phone"
},
{
"app": "Phone"
},
{
"app": "Phone"
},
{
"app": "Phone"
},
{
"app": "Phone"
},
{
"app": "Phone"
},
{
"app": "Phone"
},
{
"app": "Phone"
},
{
"app": "Phone"
},
{
"app": "Phone"
},
{
"app": "Phone"
},
{
"app": "Phone"
},
{
"app": "Phone"
},
{
"app": "Phone"
},
{
"app": "Phone"
},
{
"app": "Phone"
},
{
"app": "Phone"
},
{
"app": "Phone"
},
{
"app": "Phone"
},
{
"app": "Phone"
},
{
"app": "Settings"
},
{
"app": "Settings"
},
{
"app": "Settings"
},
{
"app": "Settings"
},
{
"app": "Settings"
},
{
"app": "Settings"
},
{
"app": "Settings"
},
{
"app": "Settings"
},
{
"app": "Settings"
},
{
"app": "Settings"
},
{
"app": "Settings"
},
{
"app": "Settings"
},
{
"app": "Settings"
},
{
"app": "Settings"
},
{
"app": "Settings"
},
{
"app": "Settings"
},
{
"app": "Settings"
},
{
"app": "Settings"
},
{
"app": "Settings"
},
{
"app": "Settings"
},
{
"app": "Google Play Store"
},
{
"app": "Google Play Store"
},
{
"app": "Google Play Store"
},
{
"app": "Google Play Store"
},
{
"app": "Google Play Store"
},
{
"app": "Google Play Store"
},
{
"app": "Google Play Store"
},
{
"app": "Google Play Store"
},
{
"app": "Google Play Store"
},
{
"app": "Google Play Store"
},
{
"app": "Google Play Store"
},
{
"app": "Google Play Store"
},
{
"app": "Google Play Store"
},
{
"app": "Google Play Store"
},
{
"app": "Google Play Store"
},
{
"app": "Google Play Store"
},
{
"app": "Google Play Store"
},
{
"app": "Google Play Store"
},
{
"app": "Google Play Store"
},
{
"app": "Google Play Store"
},
{
"app": "Drive"
},
{
"app": "Drive"
},
{
"app": "Drive"
},
{
"app": "Drive"
},
{
"app": "Drive"
},
{
"app": "Drive"
},
{
"app": "Drive"
},
{
"app": "Drive"
},
{
"app": "Drive"
},
{
"app": "Drive"
},
{
"app": "Drive"
},
{
"app": "Drive"
},
{
"app": "Drive"
},
{
"app": "Drive"
},
{
"app": "Drive"
},
{
"app": "Drive"
},
{
"app": "Drive"
},
{
"app": "Drive"
},
{
"app": "Drive"
},
{
"app": "Drive"
},
{
"app": "Maps"
},
{
"app": "Maps"
},
{
"app": "Maps"
},
{
"app": "Maps"
}
现在您有两个问题：
重复性问题：因为每次添加app到JSON列表时都不会中断for循环，所以您将继续迭代ignoreList并将更多实例添加app到JSON列表中。为了避免您需要添加一条break语句。
并称，应该被忽略的应用程序：这是因为你所添加的app每一个实例从比较之前的JSON列表中ignoreList的app..它看起来模糊不清，也给我:)，所以我会用例子来解释。
例：
考虑您的应用=“ 设置 ”，现在您正在使用for循环将其与列表进行比较，因此首先将其与“ Google ” 进行比较，它不等于它，因此将其添加到中JSON list，当您将其应用于将其与“ 地图 ” 进行比较，依此类推，直到将其与“ 设置 ” 进行比较，这一次它不会被添加到中JSON list，但是在到达“设置”之前您已经将其添加了多次，因此需要等到您完成整个迭代，再将添加app到中JSON list。我用来boolean实现这一目标。
public void listApps(Context c) {
PackageManager pm = c.getPackageManager();
Intent main = new Intent(Intent.ACTION_MAIN, null);
main.addCategory(Intent.CATEGORY_LAUNCHER);
List<ResolveInfo> packages = pm.queryIntentActivities(main, 0);
for (ResolveInfo resolve_info : packages) {
try {
String package_name = resolve_info.activityInfo.packageName;
String app = (String) pm.getApplicationLabel(pm.getApplicationInfo(package_name, PackageManager.GET_META_DATA));
boolean isIgnored = false;
for (String tempStr : ignoreList) {
if (app.toLowerCase().contains(tempStr.toLowerCase())) {
isIgnored = true;
break; // to avoid unneeded iterations
}
}
if (!isIgnored) {
JSONObject json = new JSONObject(); // Create temp json object with app info.
json.put("app", app);
appInfo.put(json);
}
} catch (Exception e) {
e.printStackTrace();
}
}
try {
Log.d("Debug", appInfo.toString(4));
} catch (JSONException e) {
e.printStackTrace();
}
}
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