Obtain the Application List, open the application, and open the application attributes.

1. Get the application

View code

        mPackageManager = getPackageManager();        mAllPkgs = mPackageManager                .getInstalledPackages(mPackageManager.GET_ACTIVITIES);

 

2. Open the application. If the application already exists in a task, switch to the task where the application is located. If the application does not exist, open the application again.

View code

    @Override    public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {        PackageInfo packageInfo = (PackageInfo) arg0.getItemAtPosition(arg2);        boolean flg = false;        List<RecentTaskInfo> mTasks = mActivityManager.getRecentTasks(MAX_TASK,                0);        if (mTasks != null) {            for (RecentTaskInfo rti : mTasks) {                if (rti.baseIntent.getComponent().getPackageName()                        .equals(packageInfo.packageName)) {                    startActivity(rti.baseIntent);                    flg = true;                    break;                }            }        }        if (!flg) {            Intent intent = mPackageManager                    .getLaunchIntentForPackage(packageInfo.packageName);            startActivity(intent);        }    }

 

3. open application properties (API level: 9)

View code

        PackageInfo packageInfo = (PackageInfo) arg0.getItemAtPosition(arg2);        Intent intent = new Intent(                Settings.ACTION_APPLICATION_DETAILS_SETTINGS,                Uri.parse("package:" + packageInfo.packageName));        startActivity(intent);