学步园

1.获取应用程序

        mPackageManager = getPackageManager();

        mAllPkgs = mPackageManager
                .getInstalledPackages(mPackageManager.GET_ACTIVITIES);

 

2.打开应用，如果应用已经存在于某个task，则切换到应用所在task，如果不存在，则重新打开

    @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.打开应用程序属性(Api level:9)

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