Android Check if the phone has a way to install an application _android

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Mobile phone users are particularly tired of manual input of a large number of information, in a program can invoke other programs or functions can often give users a better user experience, so that users feel more cordial, so the integration between the program can lead to multi-party software work together to "win" situation.

Then we in our own program to invoke other programs are often to check the phone has not installed the software and then do the appropriate operation, such as not installed, with intent users to boot to the Android Market to download the program, such as installed then open the program, and incoming parameters and call its function.

Here's how to tell if a phone has a program installed:

Private Boolean isavilible (context context, String PackageName) {
     final Packagemanager Packagemanager = Context.getpackagemanager ()//Get Packagemanager
     list< packageinfo> pinfo = Packagemanager.getinstalledpackages (0);//Get package information for all installed programs
     list<string> pname = new Arraylist<string> ( ///To store the package name for all installed programs
     //Remove the package name from pinfo, pressing into PName list
       if (pinfo!= null) {for
       (int i = 0; i < pinfo.size (); i+ +) {
         String pn = pinfo.get (i) PackageName;
         Pname.add (PN);
       }
     Return Pname.contains (PackageName);//Determine if there is a package name for the target program in the PName, true, no false
}

The following is the logic that calls the method for judgment:

installed, open program, pass in Parameter package name: "Com.skype.android.verizon"
if (isavilible (this, "Com.skype.android.verizon")) {
    Intent i = new Intent ();
    ComponentName cn = New ComponentName ("Com.skype.android.verizon",
        "com.skype.android.verizon.SkypeActivity");
    I.setcomponent (CN);
    Startactivityforresult (i, RESULT_OK);
}
Not installed, jump to market download this program
else {
    uri uri = uri.parse ("Market://details?id=com.skype.android.verizon");//id for Package name
    Intent it = new Intent (Intent.action_view, URI);
    StartActivity (it);
}

The above method is written by myself, another online check the following method, it is said to be able to, but I used a bit of a problem, may be my incoming parameters have problems, the following two functions to be introduced to the action and intent, we can try.

Method One:

public static Boolean isintentavailable (context context, String action) {
    final Packagemanager Packagemanager = Conte Xt.getpackagemanager ();
    Final Intent Intent = new Intent (action);
    list<resolveinfo> list =
        packagemanager.queryintentactivities (Intent,
            Packagemanager.match_default _only);
    return list.size () > 0;
}

Method Two:

public boolean isintentavailable (Intent Intent) {
    final Packagemanager Packagemanager = This.getpackagemanager ();
    list<resolveinfo> List = packagemanager.queryintentactivities (Intent,
        Packagemanager.match_ default_only);
    return list.size () > 0;
}

Then do the appropriate operation, if not installed, using intent to boot the user to the Android Market to download the program, such as installed then open the program, and pass parameters and call its function.

Here's how to tell if a phone has a program installed:

Private Boolean isavilible (context context, String PackageName) {
 final Packagemanager Packagemanager = Context.getpackagemanager ()//Get Packagemanager
 list< packageinfo> pinfo = Packagemanager.getinstalledpackages (0);//Get package information for all installed programs
 list<string> pname = new Arraylist<string> ( ///To store the package name for all installed programs
 //Remove the package name from pinfo, pressing into PName list
   if (pinfo!= null) {for
   (int i = 0; i < pinfo.size (); i+ +) {
     String pn = pinfo.get (i) PackageName;
     Pname.add (PN);
   }
 Return Pname.contains (PackageName);//Determine if there is a package name for the target program in the PName, true, no false
}

The following is the logic that calls the method for judgment:

installed, open program, pass in Parameter package name: "Com.skype.android.verizon"
if (isavilible (this, "Com.skype.android.verizon")) {
    Intent i = new Intent ();
    ComponentName cn = New ComponentName ("Com.skype.android.verizon",
        "com.skype.android.verizon.SkypeActivity");
    I.setcomponent (CN);
    Startactivityforresult (i, RESULT_OK);
}
Not installed, jump to market download this program
else {
    uri uri = uri.parse ("Market://details?id=com.skype.android.verizon");//id for Package name
    Intent it = new Intent (Intent.action_view, URI);
    StartActivity (it);
}

The above method is written by myself, another online check the following method, it is said to be able to, but I used a bit of a problem, may be my incoming parameters have problems, the following two functions to be introduced to the action and intent, we can try.

Method One:

public static Boolean isintentavailable (context context, String action) {
    final Packagemanager Packagemanager = Conte Xt.getpackagemanager ();
    Final Intent Intent = new Intent (action);
    list<resolveinfo> list =
        packagemanager.queryintentactivities (Intent,
            Packagemanager.match_default _only);
    return list.size () > 0;
}

Method Two:

public boolean isintentavailable (Intent Intent) {
    final Packagemanager Packagemanager = This.getpackagemanager ();
    list<resolveinfo> List = packagemanager.queryintentactivities (Intent,
        Packagemanager.match_ default_only);
    return list.size () > 0;
}

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I hope this article will help you with the Android program.