Question

我必须在安装应用程序时解锁我的应用程序的功能（对用户）（应用程序链接出现在我的应用程序中;单击按钮时，应用程序的游戏商店链接将打开）。

注意： - 之前不应将应用程序安装在手机中。如果已安装用户，则必须要求卸载该应用程序。仅在用户卸载时应用程序，Playstore链接应该可用。

我试过这段代码，但是有问题。问题是 - 如果用户点击按钮（即链接），无论他/她是否安装了应用程序，FEATURE都会被解锁。

TextView tv, tvad;
Button bcheck;
int p=0;
String x="";
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    boolean installed = appInstalledOrNot("com.ankushkapoor2015.kiittimetable");
    tv = (TextView) findViewById(R.id.tvCheck);
    tvad = (TextView) findViewById(R.id.tvad);
    bcheck = (Button) findViewById(R.id.button);

    try
    {
        SharedPreferences sharedPreferences = getSharedPreferences("MyData", Context.MODE_PRIVATE);
        x = sharedPreferences.getString("CHECK", "");
        System.out.println("FILE READ");
    }
    catch (Exception e)
    {
        System.out.println("FILE NOT READ");
    }
    System.out.println(x + " Hello");
    if(x.equalsIgnoreCase("Installed"))
        tvad.setText("UNLOCK THE FEATURE");
    else
        tvad.setText("LOCK THE FEATURE");

    if(installed) {
        tv.setText("Installed - Uninstall App"+p);
        bcheck.setVisibility(View.INVISIBLE);
        System.out.println("App is already installed on your phone");
    } else {
        tv.setText("Not Installed "+p);
        System.out.println("App is not currently installed on your phone");
    }
    bcheck.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            p=1;//app installed
            try {
                SharedPreferences sharedPreferences = getSharedPreferences("MyData", Context.MODE_PRIVATE);
                SharedPreferences.Editor editor = sharedPreferences.edit();
                String s = "Installed";
                editor.putString("CHECK", s);
                editor.commit();
                System.out.println("FILE CREATED");
                Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=com.ankushkapoor2015.kiittimetable"));
                startActivity(browserIntent);
            }
            catch (Exception e)
            {
                System.out.println("FILE NOT CREATED");
            }
        }
    });
}
private boolean appInstalledOrNot(String uri) {
    PackageManager pm = getPackageManager();
    boolean app_installed;
    try {
        pm.getPackageInfo(uri, PackageManager.GET_ACTIVITIES);
        app_installed = true;
    }
    catch (PackageManager.NameNotFoundException e) {
        app_installed = false;
    }
    return app_installed;
}

Answer 1

在if else working

中添加以下语句

if(x.equalsIgnoreCase("Installed")&&installed==true)//installed==true added 
        tvad.setText("UNLOCK THE FEATURE");
    else
        tvad.setText("LOCK THE FEATURE");

仅在用户安装其他应用时才解锁我的应用中的功能

1 个答案: