安卓6.0后运行时权限封装

以SD卡读写权限为例：

MainActivity继承PermissionActivity,调用时，仅需：

applyStoragePermission();
this.setOnPermissionListener(new OnPermissionListener() {
    @Override
    public void ok() {
        //TODO
    }
});

申请权限的Activity父类：(此处仅以SD卡为例，其他可以在switch中添加其他)

package utils.base;

import android.Manifest;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;

/**
 * 作者：张风捷特烈
 * 时间：2018/5/16 14:55
 * 邮箱：[email protected]
 * 说明：申请权限的Activity父类
 */
public class PermissionActivity extends AppCompatActivity {
    private static final int STORAGE_CODE = 0x01;
    private PermissionBean mStorageModel;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

    }


    /**
     * 申请权限
     */
    public void applyPermission(PermissionBean model) {

        if (PackageManager.PERMISSION_GRANTED != ContextCompat.checkSelfPermission(this, model.permission)) {
            ActivityCompat.requestPermissions(this, new String[]{model.permission}, model.requestCode);
            return;
        }
        if (mOnPermissionListener != null) {
            mOnPermissionListener.ok();
        }

    }

    /**
     * 申请SD卡读写权限
     */
    public void applyStoragePermission() {
        mStorageModel = new PermissionBean(Manifest.permission.WRITE_EXTERNAL_STORAGE,
                "我们需要您允许我们读写你的存储卡，以方便我们临时保存一些数据", STORAGE_CODE);
        applyPermission(mStorageModel);
    }


    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        switch (requestCode) {
            case STORAGE_CODE:
                showInfoDialog(permissions, grantResults[0], mStorageModel);
                break;
        }
    }

    /**
     * 如果拒绝，弹出对话框，说明为什么需要这个权限
     *
     * @param permissions
     * @param grantResult
     * @param model
     */
    private void showInfoDialog(String[] permissions, int grantResult, PermissionBean model) {
        if (PackageManager.PERMISSION_GRANTED != grantResult) {
            if (ActivityCompat.shouldShowRequestPermissionRationale(this, permissions[0])) {
                AlertDialog.Builder builder = new AlertDialog.Builder(this).setTitle("权限申请")
                        .setMessage(model.explain).setPositiveButton(
                                "我知道了",
                                new DialogInterface.OnClickListener() {
                                    @Override
                                    public void onClick(DialogInterface dialog, int which) {
                                        applyStoragePermission();
                                    }
                                }
                        );
                builder.setCancelable(false);
                builder.show();
            }
            return;
        }
    }

    /**
     * Permission的bean对象
     */
    public static class PermissionBean {

        public String permission;//请求的权限
        public String explain;//解析为什么请求这个权限
        public int requestCode;//请求代码

        public PermissionBean(String permission, String explain, int requestCode) {
            this.permission = permission;
            this.explain = explain;
            this.requestCode = requestCode;
        }
    }


    /**
     * 权限申请事件监听
     */
    public interface OnPermissionListener {
        void ok();//成功时回调方法
    }

    private OnPermissionListener mOnPermissionListener;

    public void setOnPermissionListener(OnPermissionListener onPermissionListener) {
        mOnPermissionListener = onPermissionListener;
    }
}