多选按钮CheckBox（对话框显示结果）

多选按钮CheckBox（对话框显示结果）

1.toast吐司打印显示结果

（1）Toast.makeText(MainActivity.this, str, Toast.LENGTH_LONG).show();
//1.显示的activity，2.显示内容，3.打印时间长短，4.调用show方法显示
（2）toast居中显示设置
Toast toast=Toast.makeText(getApplicationContext(),str,Toast.LENGTH_LONG);
toast.setGravity(Gravity.CENTER,0,0);
toast.show();

2.对话框显示结果

AlertDialog.Builder builder1= new AlertDialog.Builder(MainActivity.this); //实例化AlertDialog.Builder
builder1.setTitle(“业余爱好”); //对话框标题
builder1.setMessage(“您选择的业余爱好为：” + checked); //要显示的内容
builder1.show();
xml文件：

<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"
    android:orientation="vertical"
    tools:context=".MainActivity">

<CheckBox
    android:id="@+id/checkbox1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="跳舞"
    android:textSize="20dp"/>
    <CheckBox
        android:id="@+id/checkbox2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="唱歌"
        android:checked="true"
        android:textSize="20dp"/>
    <CheckBox
        android:id="@+id/checkbox3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="睡觉"
        android:checked="true"
        android:textSize="20dp"/>
    <Button
        android:id="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="显示结果"
        android:textSize="20dp"/>
</LinearLayout>

java文件

package com.example.acer.checkbox;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.Toast;


public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button btn= (Button) findViewById(R.id.btn);
       final CheckBox checkbox1= (CheckBox) findViewById(R.id.checkbox1);
        final CheckBox checkBox2= (CheckBox) findViewById(R.id.checkbox2);
        final CheckBox checkBox3= (CheckBox) findViewById(R.id.checkbox3);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String checked="";
                if (checkbox1.isChecked()){
                    checked += checkbox1.getText().toString();
                    //Toast.makeText(MainActivity.this, "您的业余爱好是"+checked,Toast.LENGTH_LONG).show();
                }
                if (checkBox2.isChecked()){
                    checked += checkBox2.getText().toString();
                    //Toast.makeText(MainActivity.this, "您的业余爱好是"+checked,Toast.LENGTH_LONG).show();
                }
                if (checkBox2.isChecked()){
                    checked += checkBox3.getText().toString();
                    //Toast.makeText(MainActivity.this, "您的业余爱好是"+checked,Toast.LENGTH_LONG).show();
                }
                AlertDialog.Builder builder1= new AlertDialog.Builder(MainActivity.this);
                builder1.setTitle("业余爱好");
               builder1.setMessage("您选择的业余爱好为：" + checked);
                builder1.show();
            }
        });
            }

    }