<?xml version="1.0" encoding="utf-8"?>

 <manifest xmlns:android="http://schemas.android.com/apk/res/android"

     package="market.phone">

     <uses-permission android:name="android.permission.CALL_PHONE"/>//添加权限

     <application

         android:allowBackup="true"

         android:icon="@mipmap/ic_launcher"

         android:label="@string/app_name"

         android:supportsRtl="true"

         android:theme="@style/AppTheme">

         <activity android:name=".MainActivity">

             <intent-filter>

                 <action android:name="android.intent.action.MAIN" />

                 <category android:name="android.intent.category.LAUNCHER" />

             </intent-filter>

         </activity>

     </application>

 </manifest>

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:id="@+id/activity_main"

    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="market.phone.MainActivity">

    <TextView

        android:id= "@+id/tv"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="请输入电话号码："

        android:layout_alignParentTop="true" />

    <EditText

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:inputType="phone"

        android:layout_marginTop="24dp"

        android:id="@+id/editText"

        android:singleLine="true"

        android:layout_below="@+id/tv"

        android:layout_alignParentLeft="true"

        android:layout_alignParentStart="true" />

    <Button

        android:text="点击拨打"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:id="@+id/button"

        android:layout_below="@+id/editText"

        android:layout_alignParentLeft="true"

        android:layout_alignParentStart="true" />

</RelativeLayout>

package market.phone;

import android.content.Intent;

import android.net.Uri;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.text.Editable;

import android.util.Log;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

public class MainActivity extends AppCompatActivity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        //找到对应控件

        final EditText et = (EditText) findViewById(R.id.editText);

        Button bt = (Button) findViewById(R.id.button);

        //设置监听器,采用匿名内部类方式

        bt.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                //获取输入电话号码字符串

                String number = et.getText().toString().trim();

                Log.e("dail","click");

                Log.e("dail",number);

                //打电话

                dailPhone(number);

            }

        });

        //添加权限

    }

    //打电话方法

    public void dailPhone(String number){

        //创建一个意图

        Intent i = new Intent();

        //设置意图的动作，要干什么.打电话

        i.setAction(Intent.ACTION_CALL);

        //传入数据

        i.setData(Uri.parse("tel:"+number));

        startActivity(i);

    }

}