Android 6.0动态添加权限

Android 6.0加入了动态权限，权限有普通权限和危险权限两种，其中危险权限在6.0以上的手机是需要动态添加权限的，举例：拨打10086

//-----------------布局文件---------------

<Button
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="拨打10086"
    android:onClick="button"/>

//-----------清单文件中添加权限----------------------------

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

//-----------------Activity中----------------------------------------

package dongtaiquanxian.bwie.com.dongtaiquanxian;

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.view.View;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
    public void button(View view){
        // 判断环境兼容，检查自己的权限，是否被同意
        if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CALL_PHONE)!= PackageManager.PERMISSION_GRANTED){
            //如果不同意，就去请求权限   参数1：上下文，2：权限，3：请求码
            ActivityCompat.requestPermissions(MainActivity.this,new String []{Manifest.permission.CALL_PHONE},1);
        }else {
            //同意就拨打
            call();
        }

    }

    private void call() {
        Intent intent=new Intent(Intent.ACTION_CALL);
        intent.setData(Uri.parse("tel:10086"));
        try {
            startActivity(intent);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        //判断请求码
        switch (requestCode){
            case 1:
                //如果同意，就拨打
                if (grantResults.length>0&&grantResults[0]==PackageManager.PERMISSION_GRANTED){
                    call();
                }else{
                    Toast.makeText(this,"哈哈哈",Toast.LENGTH_SHORT).show();
                }
                break;
        }
    }
}

//------------就这么简单-----------------