1.首先要去AndroidManifes.xml中声明权限
<uses-permission android:name="android.permission.CALL_PHONE"/>
2.定义一个按钮,触发事件
package com.example.administrator.runtimepermission; import android.Manifest; import android.app.Activity; import android.content.Intent; import android.content.pm.PackageManager; import android.net.Uri; import android.support.annotation.NonNull; import android.support.v4.app.ActivityCompat; import android.support.v4.content.ContextCompat; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.Toast; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button button = (Button) findViewById(R.id.make_call); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { if(ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CALL_PHONE)!= PackageManager.PERMISSION_GRANTED) //判断是否授权,利用返回值和PackageManager.PERMISSION_GRANTED比较,相等就是授权 { ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.CALL_PHONE},1); //如何没有授权就向用户请求申请权限 }else { call(); } } }); } private void call(){ try { Intent intent = new Intent(Intent.ACTION_CALL); intent.setData(Uri.parse("tel:10086")); startActivity(intent); } catch (Exception e) { e.printStackTrace(); } } @Override //无论是确定还是拒绝,都会回调到onRequestPermissionsResult(),grantResults为授权结果 public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { switch (requestCode){ case 1: //同意 if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){ call(); } //拒绝 else{ Toast.makeText(this,"you denied the permission",Toast.LENGTH_SHORT).show(); } break; default: } } }