android 33 对话框控件
对话框控件:最多3个按钮。
mainActivity.java
package com.sxt.day05_09; import android.app.Activity; import android.app.AlertDialog; import android.content.DialogInterface; import android.os.Bundle; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.EditText; import android.widget.Toast; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); setListener(); } private void setListener() { setStandardDialogClickListener(); setItemsDialogClickListener(); setCustomDialogClickListener(); } //自定义对话框 private void setCustomDialogClickListener() { findViewById(R.id.btnCustomDialog).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { //将custom_dialog.xml解析为一个View类型的java对象 View layout = View.inflate(MainActivity.this, R.layout.custom_dialog, null); final EditText etAddrss=(EditText) layout.findViewById(R.id.etAddress); AlertDialog.Builder builder=new AlertDialog.Builder(MainActivity.this);//Builder是内部类 builder.setTitle("输入地址的对话框")//setTitle()返回builder对象(builder对象的地址),所以可以继续用点调用其他方法, .setView(layout)//添加自定义布局,替换掉setMessage() .setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { String address=etAddrss.getText().toString();//内部类调用外部的方法的变量要是final类型 Log.i("main",address); } }); AlertDialog dialog = builder.create();//create最终创建对话框 dialog.show();//显示出来 } }); } //列表类型的对话框 private void setItemsDialogClickListener() { findViewById(R.id.btnItemsDialog).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { //真正创建对话框不是AlertDialog,而是这个类的内部类Builder, AlertDialog.Builder builder=new AlertDialog.Builder(MainActivity.this); builder.setItems(new String[]{"增加数据","删除数据","修改数据"}, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) {//dialog是当前操作的AlertDialog对象, switch (which) { case 0: Toast.makeText(MainActivity.this, "执行增加数据的操作", 3000).show(); break; case 1: Toast.makeText(MainActivity.this, "执行删除数据的操作", 3000).show(); break; case 2: Toast.makeText(MainActivity.this, "执行修改数据的操作", 3000).show(); break; } } }); AlertDialog dialog = builder.create(); dialog.show(); } }); } //标准对话框 private void setStandardDialogClickListener() { findViewById(R.id.btnStandardDialog).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { //创建对话框的Builder对象,Builder是AlertDialog的内部类 AlertDialog.Builder builder=new AlertDialog.Builder(MainActivity.this); builder.setTitle("退出考试窗口") .setMessage("退出考试吗?") .setPositiveButton("确定", new DialogInterface.OnClickListener() {//setPositiveButton创建肯定的按钮,按钮文本是"确定",点击按钮的监听器是DialogInterface.OnClickListener //OnClickListener是DialogInterface的内部接口, @Override public void onClick(DialogInterface dialog, int which) { Log.i("main","退出考试"); } }).setNegativeButton("放弃", new DialogInterface.OnClickListener() {////setNegativeButton创建否定的按钮,按钮的文本和监听器 //如果不添加监听器,则仅仅关闭对话框没有动作。 @Override public void onClick(DialogInterface dialog, int which) { Log.i("main","继续考试"); } }); AlertDialog dialog = builder.create();//create最终创建对话框 dialog.show();//显示出来 } }); } }
main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <Button android:id="@+id/btnStandardDialog" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="标准对话框" /> <Button android:id="@+id/btnItemsDialog" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="列表对话框" /> <Button android:id="@+id/btnCustomDialog" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="自定义对话框" /> </LinearLayout>
custom_dialog.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="输入地址"/> <EditText android:id="@+id/etAddress" android:layout_width="match_parent" android:layout_height="wrap_content"/> </LinearLayout>