我正在尝试显示所有已安装的应用程序及其图标。单击列表项后,我将向该应用程序显示相关记录。
应用程序和图标正常显示但是当我点击列表项时,我收到以下错误。java.lang.classcastException android.content.pm.ResolveInfo
final PackageManager pm = this.getPackageManager();
Intent intent = new Intent(Intent.ACTION_MAIN, null);
intent.addCategory(Intent.CATEGORY_LAUNCHER);
final ArrayList<ResolveInfo> list = (ArrayList<ResolveInfo>) pm
.queryIntentActivities(intent,
PackageManager.PERMISSION_GRANTED);
for (ResolveInfo rInfo : list) {
Log.i("taa", ": Installed Applications "
+ rInfo.activityInfo.applicationInfo.loadLabel(pm)
.toString());
}
final ArrayAdapter<ResolveInfo> adapter = new ArrayAdapter<ResolveInfo>(
this, R.layout.installedapp, list) {
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null)
convertView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.installedapp, parent, false);
final String text = list.get(position).activityInfo.applicationInfo
.loadLabel(pm).toString();
((TextView) convertView.findViewById(R.id.text)).setText(text);
final Drawable drawable = list.get(position).activityInfo.applicationInfo
.loadIcon(pm);
((ImageView) convertView.findViewById(R.id.image))
.setImageDrawable(drawable);
return convertView;
}
};
setListAdapter(adapter);
ListView lv = getListView();
lv.setTextFilterEnabled(true);
}
protected void onListItemClick(ListView l, View v, int position, long id) {
String item = (String) getListAdapter().getItem(position);///////---->error
List<String> app_item = dh.getRecordItem(item);
// Toast.makeText(this, item + " selected", Toast.LENGTH_LONG).show();
Intent intent = new Intent(ApplicationList.this, AppContent.class);
Bundle bundle = new Bundle();
if (app_item.get(0).equals("No records")) {
Log.d("Set", "No Activity happened");
bundle.putString("list", app_item.toString());
} else {
Log.d("Set", "Act happened");
bundle.putString("list", app_item.toString());
}
intent.putExtras(bundle);
startActivity(intent);
}
我尝试在日志中打印item的值我得到了这个值resolverInfo{405437c0 com.android.camera gallaru pickerp=0 o=0 m=0x108000}
但我只想拿到相机。这样我的代码就可以点击工作了。
我该怎么做才能解决这个错误。
谢谢。
答案 0 :(得分:2)
实际上,您正在将ResolveInfo
对象转换为String
对象,这就是您获得异常的原因..
试试这个
protected void onListItemClick(ListView l, View v, int position, long id) {
ResolveInfo info = (ResolveInfo) getListAdapter().getItem(position);
String item = info.activityInfo.name;
.
.
.
让我知道发生了什么......