动态权限申请

Android6.0之后安全权限需要使用动态申请

检查是否有授权

ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CALL_PHONE) != 
PackageManager.PERMISSION_GRANTED

第一个参数：检查权限的context
第二个参数：检查的权限

申请权限

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

第一个参数：目标activity
第二个参数：申请的权限
第三个参数：回掉时的code

重写回掉函数onRequestPermissionsResult

package com.example.runtimepermission;

import android.Manifest;
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 {

    private static int CALL_PHONE_CODE = 1;
    private static String TAG = "CALLPHONE";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button btn_call = (Button) findViewById(R.id.btn_call);
        btn_call.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //先检查权限
                if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
                    Log.i(TAG, "PackageManager.PERMISSION_GRANTED: " + PackageManager.PERMISSION_GRANTED);
                    //
                    ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.CALL_PHONE}, CALL_PHONE_CODE);
                } 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
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        Log.i(TAG, "requestCode: " + requestCode + "\npermissions: " + permissions.toString() + "\ngrantResults: " + grantResults.toString());
        switch (requestCode) {
            case 1:
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    call();
                } else {
                    Toast.makeText(this, "You denied the permission", Toast.LENGTH_SHORT).show();
                }
                break;
            default:
        }
    }
}