小编the*_*hej的帖子

我有一个列表活动,显示设备中所有正在运行的应用程序.它显示所有应用程序的默认图标.但我需要为列表中的每个应用程序获取实际应用程序图标.

public class ApplicationList extends ListActivity {
DataHelper dh;
ImageView vi;
private Drawable icon;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.applist);
    dh = new DataHelper(getApplicationContext());

    PackageManager pm = this.getPackageManager();

    Intent intent = new Intent(Intent.ACTION_MAIN, null);
    intent.addCategory(Intent.CATEGORY_LAUNCHER);

    Log.d("Test1", "INSERTING APP LIST TO SERVER DB");
     List<ResolveInfo> list = pm.queryIntentActivities(intent, PackageManager.PERMISSION_GRANTED);
     ArrayList<String> applist = new ArrayList<String>();

     for(ResolveInfo rInfo: list){

        applist.add(rInfo.activityInfo.applicationInfo.loadLabel(pm).toString() );
    }


    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
            R.layout.installedapp, R.id.textView1, applist);
    setListAdapter(adapter);
}

如何获取其他应用程序的图标(Android) 我尝试了这个链接,但我没有解决问题.所以任何人都可以帮助我.谢谢!

活动显示带有正按钮的对话窗口.点击按钮,它将进入Staticdisplay活动.我正在尝试在加载活动时添加进度条.我收到以下错误.$BadTokenException: Unable to add window -- token null is not for an application

这是添加进程栏的代码.. progressBar.show();我在这一行得到错误.我该如何摆脱这个错误.谢谢.

AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setCustomTitle(title);

        builder.setMessage(R.string.app_description).setPositiveButton(
                "Ok", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        if (Registration.isRunning == false) {
                            startService(new Intent(
                                    getApplicationContext(),
                                    Registration.class));
                        }
                        staticInfo();
                        if (Registration.ruid == null)
                            Registration.ruid = uId;
                        progressBar = new ProgressDialog(
                                getApplicationContext());
                        progressBar.setCancelable(true);
                        progressBar.setMessage("Loading Activity...");
                        progressBar
                                .setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
                        progressBar.setProgress(0);
                        progressBar.setMax(100);
                        progressBar.show();
                        progressBarStatus = 0;

                        new Thread(new Runnable() {
                            public void run() {
                                while …

有没有机会将TELEPHONY_SERVICE作为null？

     TelephonyManager teleman = (TelephonyManager) getBaseContext()
            .getSystemService(Context.TELEPHONY_SERVICE);

我的意思是在上面的行中有没有机会让teleman成为null？

在此先感谢您的回复.