大佬教程收集整理的这篇文章主要介绍了java – 在Android中扩展AlertDialog.Builder,大佬教程大佬觉得挺不错的,现在分享给大家,也给大家做个参考。
public class AlertBuilder extends AlertDialog.builder { private MultiAdapter mAdapter; private ListView lv; private Activity mActivity; private Context mContext; private checkedTxtView checkedItem; public AlertBuilder(Context context,Activity activity,final List<checkedTxtView> mList) { super(context); this.mActivity = activity; this.mContext = context; this.settitle("Test"); LayoutInflater inflater = activity.getLayoutInflater(); View dialoglayout = inflater.inflate(R.layout.main_filter,null); this.setView(dialoglayout); mAdapter = new MultiAdapter(context,mList); lv = (ListView) dialoglayout.findViewById(R.id.list); lv.setAdapter(mAdapter); lv.setOnItemClickListener(new ItemClick()); } class ItemClick implements OnItemClickListener { public void onItemClick(AdapterView<?> parent,View view,int position,long id) { checkedItem = mAdapter.mItems.get(position);; mAdapter.notifyDataSetChanged(); } } private class MultiAdapter extends ArrayAdapter<checkedTxtView> { private List<checkedTxtView> mItems; public MultiAdapter(Context context,List<checkedTxtView> mList) { super(context,R.layout.list2,mList); this.mItems = mList; } @Override public View getView(int position,View convertView,ViewGroup parent) { View row; if (convertView == null) { LayoutInflater inflater = mActivity.getLayoutInflater(); row = inflater.inflate(R.layout.list2,parent,falsE); } else row = convertView; checkedTextView txt = (checkedTextView) row.findViewById(R.id.label); checkedTxtView c = mItems.get(position); System.out.println(c.item); txt.setText(c.item); if(checkedItem != null && checkedItem.item != null) txt.setchecked(c.item.equals(checkedItem.item)); return row; } }
然后我在我的Activity中使用它:
public class MainActivity extends Activity { private List<checkedTxtView> mList; private AlertDialog mAlert; private AlertDialog.builder mAlertBuilder; @Override protected void onCreate(Bundle savedInstanceStatE) { super.onCreate(savedInstanceStatE); setContentView(R.layout.activity_main); mList = new ArrayList<checkedTxtView>(); for(int i=0; i<30; i++) { checkedTxtView c = new checkedTxtView(); c.item = "item " + i; mList.add(c); } mAlertBuilder = new AlertBuilder(getApplicationContext(),this,mList); mAlert = mAlertBuilder.create(); Button mButton = (Button) this.findViewById(R.id.mButton); mButton.setOnClickListener(new View.onClickListener() { public void onClick(View v) { mAlert.show(); } }); } }
我在控制台中收到此错误:
02-07 13:33:05.641: E/AndroidRuntime(12557): FATAL EXCEPTION: main 02-07 13:33:05.641: E/AndroidRuntime(12557): android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application 02-07 13:33:05.641: E/AndroidRuntime(12557): at android.view.ViewRoot.setView(ViewRoot.java:566) 02-07 13:33:05.641: E/AndroidRuntime(12557): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:179) 02-07 13:33:05.641: E/AndroidRuntime(12557): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91) 02-07 13:33:05.641: E/AndroidRuntime(12557): at android.app.Dialog.show(Dialog.java:265) 02-07 13:33:05.641: E/AndroidRuntime(12557): at com.example.testdialog.MainActivity$1.onClick(MainActivity.java:35) 02-07 13:33:05.641: E/AndroidRuntime(12557): at android.view.View.performClick(View.java:2533) 02-07 13:33:05.641: E/AndroidRuntime(12557): at android.view.View$PerformClick.run(View.java:9320) 02-07 13:33:05.641: E/AndroidRuntime(12557): at android.os.Handler.handleCallBACk(Handler.java:587) 02-07 13:33:05.641: E/AndroidRuntime(12557): at android.os.Handler.dispatchmessage(Handler.java:92) 02-07 13:33:05.641: E/AndroidRuntime(12557): at android.os.Looper.loop(Looper.java:150) 02-07 13:33:05.641: E/AndroidRuntime(12557): at android.app.ActivityThread.main(ActivityThread.java:4385) 02-07 13:33:05.641: E/AndroidRuntime(12557): at java.lang.reflect.Method.invokeNative(Native Method) 02-07 13:33:05.641: E/AndroidRuntime(12557): at java.lang.reflect.Method.invoke(Method.java:507) 02-07 13:33:05.641: E/AndroidRuntime(12557): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849) 02-07 13:33:05.641: E/AndroidRuntime(12557): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:607) 02-07 13:33:05.641: E/AndroidRuntime(12557): at dalvik.system.NativeStart.main(Native Method)
我可能会想念这里.你能帮助我吗?
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