第五六周作业

package itcast.cn;
        import android.app.AlertDialog;
        import android.content.DialogInterface;
        import android.os.Bundle;
        import android.app.Activity;


public class Main2Activity extends Activity {


    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
    }



    public void onBackPressed(){
        AlertDialog dialog;
        AlertDialog.Builder builder=new AlertDialog.Builder(this)
                .setTitle("普通对话框")
                .setIcon(R.drawable.ic_launcher_background)
                .setMessage("是否确定退出")
                .setPositiveButton("确定", new DialogInterface.OnClickListener() {


                    public void onClick(DialogInterface dialog, int which) {
                        dialog.dismiss();
                        Main2Activity.this.finish();}

                })
                .setNegativeButton("取消", new DialogInterface.OnClickListener() {


                    public void onClick(DialogInterface dialog, int which) {
                        dialog.dismiss();
                    }
                });
        dialog=builder.create();
        dialog.show();
    }

}

 

 

<?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="vertical">

    <Button
        android:id="@+id/bt_1"
        android:layout_width="wrap_content"
        android:layout_height="100dp"
        android:text="单选框"
        android:gravity="center"
        android:layout_marginTop="50dp"
        android:layout_gravity="center">
    </Button>

</LinearLayout>
package itcast.cn;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;


public class Main2Activity extends Activity implements View.OnClickListener{
   private int i=1;
   private int i1[]={1,2};


    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        findViewById(R.id.bt_1).setOnClickListener(this);

    }

    public void onClick(View v){
        AlertDialog dialog;
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("你的性别是？");
        builder.setSingleChoiceItems(new String[]{"女","男"},i,new DialogInterface.OnClickListener(){
            public void onClick(DialogInterface dialog,int which){
                i=which;
            }
        });
        builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
               if (i==1){
                   Toast.makeText(Main2Activity.this,"你选择了男",Toast.LENGTH_SHORT).show();
               }else{
                   Toast.makeText(Main2Activity.this,"你选择了女",Toast.LENGTH_SHORT).show();
               }
                dialog.dismiss();
            }
        });
        builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
            }
        });
        dialog = builder.create();
        dialog.show();

 

 

package com.example.sanzhou;


import android.net.wifi.WifiManager.MulticastLock;
import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.DialogInterface.OnMultiChoiceClickListener;
import android.view.Menu;
import android.view.MenuItem.OnMenuItemClickListener;
import android.view.View;
import android.widget.AbsListView.MultiChoiceModeListener;
import android.widget.Toast;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

    }

    public void onclick1(View view)
    {
        AlertDialog.Builder builder=new Builder(this);
        builder.setIcon(android.R.drawable.ic_dialog_info);
        builder.setTitle("请选择性别");
        final String []items=new String[]{"男","女"};
        builder.setSingleChoiceItems(items, -1, new OnClickListener() {

<?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="vertical">

    <TextView
        android:id="@+id/tv"
        android:gravity="center"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:text="单选对话框" />

    <Button
        android:onClick="onclick1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:text="选择男女"/>
</LinearLayout>

 

            @Override
            public void onClick(DialogInterface dialog, int which) {
                Toast.makeText(MainActivity.this, "您选择的是:"+items[which], Toast.LENGTH_SHORT).show();
                dialog.dismiss();

            }
        });
        builder.show();
    }



}

 

 

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:background="#8BA20B">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="35dp"
        android:text="1.TextView显示文本信息"
        android:textStyle="italic"
        android:textColor="#E71D1D"
        android:layout_marginTop="20dp"
        android:layout_marginLeft="50dp"
        android:textSize="30sp"/>

    <Button
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:layout_marginLeft="20dp"
        android:layout_marginTop="60dp"
        android:layout_marginRight="20dp"
        android:text="2.按钮"
        android:textColor="#E71D1D"
        android:textSize="30sp" />
    <EditText
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:text="3.编辑框:请输入信息"
        android:textSize="30sp"
        android:layout_marginTop="120dp"
        android:textColor="#E71D1D"
        android:layout_marginLeft="35dp"/>
    <RadioGroup
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"
        android:orientation="horizontal"/>
    <RadioButton
        android:id="@+id/rb_1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="4.男"
        android:textSize="30sp"
        android:layout_marginTop="180dp"
        android:textColor="#E71D1D"
        android:layout_marginLeft="35dp"/>
    <RadioButton
        android:id="@+id/rb_2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="女"
        android:layout_toRightOf="@id/rb_1"
        android:textSize="30sp"
        android:layout_marginTop="180dp"
        android:textColor="#E71D1D"
        android:layout_marginLeft="35dp"/>
    <CheckBox
        android:id="@+id/cb_1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="电脑"
        android:textColor="#E71D1D"
        android:textSize="30sp"
        android:layout_marginTop="230dp"
        android:layout_marginLeft="35dp"/>
    <CheckBox
        android:id="@+id/cb_2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="手机"
        android:textColor="#E71D1D"
        android:textSize="30sp"
        android:layout_below="@id/cb_1"
        android:layout_marginTop="10dp"
        android:layout_marginLeft="35dp"/>







</RelativeLayo>