标签: android-alertdialog

我是Android开发的新手.

目前,我正在开发接收短信类应用程序,它接收短信并显示用于文本到语音功能选项的alertdialog().我在Broadcastreceiver类的另一个类中调用alertdialog()的方法.当应用程序运行时,会出现alertdialog(),但在按下Home按钮后却没有.

所以我该怎么做？

请帮我.

我有一个应用程序查询手机的数据库中的消息.如果光标返回其中包含消息,那么我试图一个接一个地在alertdialog中显示每条消息.我收到以下错误,说有窗口泄漏.

我认为这与下一个显示之前没有正确取消alertdialog有关.有谁知道我为什么会收到这个错误？

@Override
    protected void onResume() {
        super.onResume();
      Cursor c = nfcScannerApplication.loginValidate.queryAllFromMessage();

        Log.e(TAG, "messages in db = " +  c.getCount());


            if(c != null && c.getCount() > 0){
                c.moveToFirst();

                while(c.moveToNext()){

                final String guid = c.getString(c.getColumnIndex(LoginValidate.C_MESSAGE_GUID));
                final String message = c.getString(c.getColumnIndex(LoginValidate.C_MESSAGE_TEXT));
                final String createdAt = c.getString(c.getColumnIndex(LoginValidate.C_MESSAGE_CREATED_AT));
                final String sender = c.getString(c.getColumnIndex(LoginValidate.C_MESSAGE_SENDER));


                DateTime dt = new DateTime(createdAt);
                DateTimeFormatter fmt2 = DateTimeFormat.forPattern("H:mm d-MMM-Y");
                String date = fmt2.print(dt);

                AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
                        this);

                    // set title
               alertDialogBuilder.setTitle("You have a new message : " ); …

我使用此代码构建一个带EditText的AlertDialog:

AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle("Title");
builder.setView(LayoutInflater.from(context).inflate(R.layout.dialog_view, null));
builder.setNegativeButton("Cancel", null);
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        mInput = ((EditText) LayoutInflater.from(context).inflate(R.layout.dialog_view, null).findViewById(R.id.etxtDialog)).getText().toString();
    }
});
builder.show();

当我运行此代码时,mInput.length()== 0,因此字符串为空.mInput = ((EditText) LayoutInflater.from(context).inflate(R.layout.dialog_view, null).findViewById(R.id.etxtDialog)).getText().toString();虽然执行该行,但EditText确实包含一些字符.为什么这段代码不起作用？

我在Android应用程序中实现了警报.报警工作正常.Toast消息是可见的. 现在我想向用户发出警报框通知.

这是来自ReceiverActivityClass的代码.我试过了

public class ReceiverActivity extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
    // TODO Auto-generated method stub

// Code....


    new AlertDialog.Builder(context)
    .setTitle("Alert Box")
    .setMessage("Msg for User")
    .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface arg0, int arg1) {
        // TODO Auto-generated method stub
            // some coding...
        }
    })
    .setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface arg0, int arg1) {
            arg0.dismiss();
    }
}).create().show();
}

}

我无法显示对话框,我尝试但返回空指针.问题,我认为是上下文,我已尝试过这个但获得相同的结果......我认为另一种可能性是打开一个线程并在Main Activity中显示AlertDialog,这是我的代码:

文件 Sector1.java公共类Sector1扩展Fragment {

    private Button btnNew_order,btnAggiungi;
    private Spinner spin_prodotto, spin_tipo;
    private EditText EtQta;
    ListView userList;
    static UserCustomAdapter userAdapter;
    ArrayList<User> userArray = new ArrayList<User>();


        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.sector1, container, false);

            userAdapter = new UserCustomAdapter(getActivity().getBaseContext(), R.layout.row, userArray);
            userList = (ListView) rootView.findViewById(R.id.listView);
            userList.setItemsCanFocus(false);
            userAdapter.notifyDataSetChanged();
            userList.setAdapter(userAdapter);  

UserCustomAdapter.java

   public class UserCustomAdapter extends ArrayAdapter<User> {
     private static final int INVISIBLE = 4;
     private static final int VISIBLE = 0;
    Context context;
     int layoutResourceId;
     ArrayList<User> …

我没有使用负面和正面按钮.我需要关闭对话框,但dialog.dismiss()无效.

        final AlertDialog.Builder alert = new AlertDialog.Builder(this);
        alert.setView(view);
        alert.setCancelable(false);
        dialog = alert.create();
        goButton.setOnClickListener(new View.OnClickListener() { //goButton is inside view which is inflated inside the dialog

            @Override
            public void onClick(View view) {
                age = (String)spinner.getSelectedItem();
                if(gender == null){
                    Utils.makeToast(context, "Select your gender");
                }else if(age == null || age.toLowerCase().contains("age") || age.equals("")){
                    spinner.performClick();
                }else{
                    Utils.makeToast(context, (String)spinner.getSelectedItem() + " - gender: " +gender);
                    editor.putInt("age", Utils.getIntOrZero(age));
                    editor.putString("gender", gender);
                    editor.commit();
                    dialog.dismiss(); // called but not working
                }
            }
        });

        alert.show();

salam
如何检查Android AlertDialog中的所有Checkbox项目(setMultiChoiceItems)

    AlertDialog.Builder builder = new AlertDialog.Builder(A);
    builder.setTitle(A.getString(R.string.which_number));
    builder.setIcon(R.drawable.ic_launcher_mini);
    builder.setMultiChoiceItems(line, null,
            new DialogInterface.OnMultiChoiceClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which,
                                    boolean isChecked) {
                }
            });

我有这个警报对话框，它有这两个按钮（确定和取消）。我想知道我如何实施它。

因此，当您单击取消按钮时，它应该关闭警报对话框并返回到我当前所在的片段。如果我单击“确定”按钮，它应该替换当前的警报对话框并将其放置在另一个对话框中。

这是我下面用于确认的代码。java文件；

public class confirmation extends DialogFragment {

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {

    final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
    LayoutInflater inf = getActivity().getLayoutInflater();
    final View theDIalog = inf.inflate(R.layout.example_xml, null);
    builder.setView(theDIalog);

AlertDialog dialog = builder.create();



    theDIalog.findViewById(R.id.makeaTransferOk).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(getActivity(), "Okay button is clicked", Toast.LENGTH_SHORT).show();
        }
    });


    theDIalog.findViewById(R.id.makeaTransferCancel).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            dialog.dismiss();
        }
    });

    return dialog;
}
}

这是我的example_xml 代码；

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#ffc0c0c0"> …

如何设计带圆角和透明关闭按钮的自定义警报对话框？