删除，拨打电话，发送短信对话框

package com.example.lenovo.textapp4;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

public class KehoutiActivity extends AppCompatActivity {


    EditText et_1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_kehouti);




    }


    public void bt_1(View v)
    {
        AlertDialog alertDialog=new AlertDialog.Builder(this)
                .setTitle("提示")
                .setMessage("确定要删除吗?\n要删除，请点击“是”")
                .setPositiveButton("是", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(KehoutiActivity.this, "已删除", Toast.LENGTH_SHORT).show();
                    }
                })
                .setNegativeButton("否", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(KehoutiActivity.this, "未删除", Toast.LENGTH_SHORT).show();
                    }
                })
                .show();
    }


    public void bt_2(View v)
    {
       final View view=View.inflate(this, R.layout.shurudianhuahaoma, null);
        et_1=(EditText)view.findViewById(R.id.et_1);
        new AlertDialog.Builder(this)
                .setTitle("请输入电话号码")
                .setView(view)
                .show();
    }
    public String getphone()
    {
        String phone=et_1.getText().toString().trim();
        if (phone.trim().length()==0)
        {
            Toast.makeText(KehoutiActivity.this, "请正确填写电话号码", Toast.LENGTH_SHORT).show();
            return null;
        }
        return phone;
    }

    public void bt_11(View v)
    {
         String phone=getphone();
        if (phone==null) return;
        Intent intent=new Intent(Intent.ACTION_DIAL);
        Uri uri=Uri.parse("tel:" + phone);

        intent.setData(uri);
        startActivity(intent);
    }
    public String getMessage()
    {
        String message = et_1.getText().toString().trim();
        if (message.length()==0)
        {
            Toast.makeText(KehoutiActivity.this, "请正确填写电话号码", Toast.LENGTH_SHORT).show();
            return null;

        }
        return message;
    }

    public void bt_22(View v)
    {
        String message = getMessage();
          if (message == null) return;
          Uri smsToUri = Uri.parse("smsto:message");
          Intent intent = new Intent(Intent.ACTION_SENDTO, smsToUri);
         intent.setData(Uri.parse("smsto:"+message));
         startActivity(intent);
    }

}

<?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.example.lenovo.textapp4.KehoutiActivity"
    android:orientation="vertical">
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="删除"
        android:onClick="bt_1"/>
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="跳转"
        android:onClick="bt_2"/>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/et_1"
        android:inputType="phone"/>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="向此号码拨出电话"
            android:onClick="bt_11"/>
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="向此号码发送短信"
            android:onClick="bt_22"/>
    </LinearLayout>

</LinearLayout>