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() {
@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"?>
<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>
<?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>
