Android實戰二：動態權限的BaseActivity封裝

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（1）效果演示

• 沒有權限的時的彈窗

• 點擊了不再提醒時的彈窗
  

• 點擊了不再提醒時跳轉到系統設置界面
  

（2）封裝後簡單使用

• 簡單使用

package com.wanhe.permissions;

import android.Manifest;
import android.content.Intent;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;

import java.util.List;

public class MainActivity extends BaseActivity {

    private static final String TAG = "MainActivity";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    /**
     * 打開相機
     */
    public void btn(View view) {

        onRequestPermission(new String[]{Manifest.permission.CAMERA},new onPermissionCallbackListener(){

            @Override
            public void onGranted() {
                Log.e(TAG, "onGranted: ");
                Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                startActivity(intent);
            }

            @Override
            public void onDenied(List<String> deniedPermissions) {
                Log.e(TAG, "onDenied: ");
            }
        });
    }
}

（3）BaseActivity的封裝代碼

• BaseActivity的封裝

package com.wanhe.permissions;

import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.provider.Settings;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;

import java.util.ArrayList;
import java.util.List;

/**
 * Description: 權限BaseActivity封裝
 * Author: Author
 * Date: 2017-08-23
 * Time: 9:27
 */
public abstract class BaseActivity extends AppCompatActivity {

    public Context mContext;
    private onPermissionCallbackListener mListener;
    private AlertDialog dialog;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mContext = this;
    }

    /**
     * 申請權限
     *
     * @param permissions
     */
    public void onRequestPermission(String[] permissions, onPermissionCallbackListener listener) {
        mListener = listener;
        List<String> permissionList = new ArrayList<>();
        //1、 哪些權限需要申請
        for (String permission : permissions) {
            if (ActivityCompat.checkSelfPermission(this, permission) != PackageManager.PERMISSION_GRANTED) {
                //權限沒有申請 添加到要申請的權限列表中
                permissionList.add(permission);
            }
        }
        if (!permissionList.isEmpty()) {
            ActivityCompat.requestPermissions(this, permissionList.toArray(new String[permissionList.size()]), 1);
        } else {
            //所有權限都同意了
            mListener.onGranted();
        }
    }

    /**
     * 權限申請結果
     *
     * @param requestCode
     * @param permissions
     * @param grantResults
     */
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == 1) {
            List<String> deniedPermissions = new ArrayList<>();
            if (grantResults.length > 0) {
                for (int i = 0; i < grantResults.length; i++) {
                    int grantResult = grantResults[i];
                    if (grantResult != PackageManager.PERMISSION_GRANTED) {
                        deniedPermissions.add(permissions[i]);
                    }
                }
            }
            if (!deniedPermissions.isEmpty()) {
                mListener.onDenied(deniedPermissions);
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                    // 判斷用戶是否 點擊了不再提醒。(檢測該權限是否還可以申請)
                    boolean b = shouldShowRequestPermissionRationale(permissions[0]);
                    if (!b) {
                        // 用戶還是想用我的 APP 的
                        // 提示用戶去應用設置界面手動開啓權限
                        showTipsDialog();
                    }
                }
            }else {
                mListener.onGranted();
            }
        } else {
            //所有的權限都被接受了
            mListener.onGranted();
        }
    }

    private void showTipsDialog() {
        // 跳轉到應用設置界面
        dialog = new AlertDialog.Builder(this)
                .setTitle("權限不可用")
                .setMessage("請在-應用設置-權限-中，允許使用權限")
                .setPositiveButton("立即開啓", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Log.e("BaseActivity", "要開啓進行權限設置");
                        // 跳轉到應用設置界面
                        Intent intent = new Intent();
                        intent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
                        Uri uri = Uri.fromParts("package", getPackageName(), null);
                        intent.setData(uri);
                        startActivity(intent);
                    }
                })
                .setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        finish();
                    }
                }).setCancelable(false).show();
    }
}

• 權限處理接口

package com.wanhe.permissions;

import java.util.List;

/**
 * 權限處理接口
 */
public interface onPermissionCallbackListener {
    void onGranted();

    void onDenied(List<String> deniedPermissions);
}