View--dialog box

dialog box

I. Classification

Warning dialog box Alertdialog:① General Dialog ② Radio dialog box ③ Check dialog Box ④ custom dialog box

Progress dialog box

Date dialog box

Time dialog box

Two. Warning dialog box Alertdialong

1. General

cannot be instantiated directly using

Using the internal constructor to generate a dialog box

New Alertdialog.builder (context) instantiation constructor: (1) Settitle (title) (2) setmessage (message)

(3) button: ① Confirm button Setpositivebutton ("Content", click event Listener) ② deny button Setnegativebutton ("Text", click event Listener) ③ neutral button Setneutralbutton ("Text", Click event Listener)

(4) Show dialog box after creation and return to Alertdialog instance (5) creat () Build dialog box and return

(6) Setcancelable (true/false): ① Set If you can click anywhere else to close the dialog ② similar to the modal window

2. Single-selection dialog box

<?xml version= "1.0" encoding= "Utf-8"? ><linearlayout xmlns:android= "Http://schemas.android.com/apk/res/android"Xmlns:tools= "Http://schemas.android.com/tools"Android:layout_width= "Match_parent"Android:layout_height= "Match_parent"Android:paddingbottom= "@dimen/activity_vertical_margin"Android:paddingleft= "@dimen/activity_horizontal_margin"Android:paddingright= "@dimen/activity_horizontal_margin"Android:paddingtop= "@dimen/activity_vertical_margin"Tools:context= "Com.hanqi.testapp2.TestActivity5"android:orientation= "Vertical" > <Button android:layout_width= "Match_parent"Android:layout_height= "Wrap_content"Android:text= "General dialog box"Android:onclick= "Bt1_onclick"/> <Button android:layout_width= "Match_parent"Android:layout_height= "Wrap_content"Android:text= "Radio dialog box"Android:onclick= "Bt2_onclick"/> <Button android:layout_width= "Match_parent"Android:layout_height= "Wrap_content"Android:text= "Check dialog box"Android:onclick= "Bt3_onclick"/></linearlayout>

 Packagecom.hanqi.testapp2;ImportAndroid.app.AlertDialog;ImportAndroid.content.DialogInterface;Importandroid.support.v7.app.AppCompatActivity;ImportAndroid.os.Bundle;ImportAndroid.view.View;ImportAndroid.widget.Toast; Public classTestActivity5extendsappcompatactivity {@Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);    Setcontentview (R.LAYOUT.ACTIVITY_TEST5); }    //General dialog Box     Public voidBt1_onclick (View v) {//dialog box cannot be instantiated directly//The constructor is provided internally//Method Chain CallAlertdialog alertdialog=NewAlertdialog.builder ( This). Settitle ("Confirmation dialog box"). Setmessage ("Are you sure you want to delete it?" "). Setpositivebutton ("Confirm",NewDialoginterface.onclicklistener () {@Override Public voidOnClick (Dialoginterface Dialog,intwhich) {Toast.maketext (TestActivity5). This, "perform delete, which=" +which, Toast.length_short). Show (); }                })//Front button. Setnegativebutton ("Cancel",NewDialoginterface.onclicklistener () {@Override Public voidOnClick (Dialoginterface Dialog,intwhich) {Toast.maketext (TestActivity5). This, "undelete, which=" +which, Toast.length_short). Show (); }                })//Negative button. Setneutralbutton ("neutral",NewDialoginterface.onclicklistener () {@Override Public voidOnClick (Dialoginterface Dialog,intwhich) {Toast.maketext (TestActivity5). This, "normal button, which" +which, Toast.length_short). Show (); }}). setcancelable (false). Show ();//Show dialog Box    }    //Single-selection dialog box     Public voidBt2_onclick (View v) {//final can extend the life cycle of this constant to the entire object        FinalString [] str={"male", "female"}; NewAlertdialog.builder ( This). Settitle ("Radio dialog box"). Setsinglechoiceitems (str,0,NewDialoginterface.onclicklistener () {@Override Public voidOnClick (Dialoginterface Dialog,intwhich) {Toast.maketext (TestActivity5). This, "which=" +which+ ", selected" +Str[which], toast.length_short). Show (); //Close the dialog boxDialog.dismiss (); }}). setcancelable (false). Show (); }    //Check dialog box     Public voidBt3_onclick (View v) {FinalString [] str={"BMW", "Mercedes", "Rolls-Royce", "Bentley"}; Final Boolean[] ch={true,false,false,true}; NewAlertdialog.builder ( This). Settitle ("Check dialog box"). Setmultichoiceitems (str, CH,NewDialoginterface.onmultichoiceclicklistener () {@Override Public voidOnClick (Dialoginterface Dialog,intWhich,BooleanisChecked) {                        //Change the selected state of the corresponding array itemch[which]=isChecked; }}). Setpositivebutton ("Confirm",NewDialoginterface.onclicklistener () {@Override Public voidOnClick (Dialoginterface Dialog,intwhich) {                        intI=0; //get the final check state                         for(Booleanb:ch) {Toast.maketext (TestActivity5). This, str[i]+ "Checked status =" + (b? ") Check ":" Unchecked "), Toast.length_long). Show (); I++; }}). Setnegativebutton ("Cancel",NULL). Setcancelable (false). Show (); }}

View--dialog box