package com.example.permissionadmin;

 import android.Manifest;

 import android.app.Activity;

 import android.content.Intent;

 import android.content.pm.PackageManager;

 import android.net.Uri;

 import android.os.Bundle;

 import android.support.v4.app.ActivityCompat;

 import android.support.v4.content.ContextCompat;

 import android.view.View;

 import android.view.View.OnClickListener;

 import android.widget.Button;

 public class MainActivity extends Activity implements OnClickListener{

     private Button callPhone;

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_main);

         callPhone=(Button)findViewById(R.id.call_Phone);

         callPhone.setOnClickListener(this);

     }

     @Override

     public void onClick(View v) {

         // TODO Auto-generated method stub

         //如果没有权限则请求权限，否则直接打电话即可

         if(ContextCompat.checkSelfPermission(this,Manifest.permission.CALL_PHONE)!=

                 PackageManager.PERMISSION_GRANTED){

             //第二个参数是数组表明可以一次性获取多个权限，后面的请求码要和回调处理函数的请求码对上

             ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CALL_PHONE}, 1);

         }else{

             doCallPhone();

         }

     }

     public void doCallPhone(){

         Intent intent=new Intent(Intent.ACTION_CALL);

         Uri data=Uri.parse("tel:"+"10086");

         intent.setData(data);

         this.startActivity(intent);

     }

     @Override

     /**

      * 不同的请求码来对应不同的授权请求

      * grantResults数组：权限请求结果

      */

     public void onRequestPermissionsResult(int requestCode,

             String[] permissions, int[] grantResults) {

         if(requestCode==1){

             if(grantResults[0]==PackageManager.PERMISSION_GRANTED){

                 doCallPhone();

             }else{

                 //提示用户权限未被授予

             }

         }

     }

 }