/**
 * Created by Leonidas on 2018/5/14.
 * Version: V1.0
 * Description:繼承了Activity，實現Android6.0的執行時許可權檢測，
 * 需要進行執行時許可權檢測的Activity可以繼承這個類。
 * Others: 暫無
 * ReviseHistory(Author、Date、RevisePart)： 暫無
 */

public class CheckPermissionsActivity extends AppCompatActivity {
    /**
     * 需要進行檢測的許可權陣列
     */
 

    protected String[] needPermissions = {
            Manifest.permission.ACCESS_COARSE_LOCATION,
            Manifest.permission.ACCESS_FINE_LOCATION,
            Manifest.permission.WRITE_EXTERNAL_STORAGE,
            Manifest.permission.READ_EXTERNAL_STORAGE,
            Manifest.permission.READ_PHONE_STATE
    };
    //許可權請求碼，作為許可權請求的標誌
 

    private static final int PERMISSIONS_REQUEST_CODE = 0;

    /**
     * 判斷是否需要檢測，防止不停的彈框
     */
    private boolean isNeedCheck = true;

    @Override
    protected void onResume() {
        super.onResume();
        if (isSystemVersionLarge23()) {//判斷系統版本是否是Android6.0以上
            if (isNeedCheck) {//如果是，則需要檢測
 

                checkPermissions(needPermissions);
            }
        }
    }

    /**
     * 判斷系統版本是否是Android6.0以上
     * @return
     */
    protected boolean isSystemVersionLarge23(){
        if (Build.VERSION.SDK_INT >= 23 && getApplicationInfo().targetSdkVersion >= 23)
            return true;
        else
            return false;
    }

    /**
     * 檢查許可權
     * @param permissions
     */
    private void checkPermissions(String... permissions) {
        try {
            if (isSystemVersionLarge23()) {
                /*需要請求的許可權*/
                List<String> needRequestPermissions = findDeniedPermissions(permissions);
                if (null != needRequestPermissions && needRequestPermissions.size() > 0) {
                    requestPermissions(needRequestPermissions.toArray(new String[needRequestPermissions.size()]),PERMISSIONS_REQUEST_CODE);
                }
            }
        } catch (Throwable e) {
        }
    }

    /**
     * 獲取許可權集中需要申請許可權的列表
     * @param Permissions
     * @return
     *
     */
    private List<String> findDeniedPermissions(String[]Permissions) {
        List<String> needRequestPermissionList = new ArrayList<String>();
        if (isSystemVersionLarge23()){
            try {
                for (String perm : Permissions) {
                    if (checkSelfPermission(perm) != PackageManager.PERMISSION_GRANTED
                            ||shouldShowRequestPermissionRationale(perm)) {//判斷許可權是否被授予
                        needRequestPermissionList.add(perm);
                    }
                }
            } catch (Throwable e) {

            }
        }
        return needRequestPermissionList;
    }

    /**
     * 檢測是否所有的許可權都已經授權
     * @param grantResults 授權的結果
     * @return
     */
    private boolean verifyPermissions(int[] grantResults) {
        for (int result : grantResults) {
            if (result != PackageManager.PERMISSION_GRANTED) {
                return false;
            }
        }
        return true;
    }

    /**
     *當進行許可權申請，
     * 並且使用者做出選擇後會回撥onRequestPermissionsResult這個方法，
     * 在這個方法中做相關處理。
     * @param requestCode 請求碼---要與進行許可權申請的requestPermissions方法中的請求碼相同，作為許可權請求的標誌
     * @param Permissions 許可權
     * @param grantResults 許可權的“授權結果”
     */
    @TargetApi(23)
    public void onRequestPermissionsResult(int requestCode, String[] Permissions, int[] grantResults) {
        if (requestCode == PERMISSIONS_REQUEST_CODE) {//許可權請求碼
            if (!verifyPermissions(grantResults)) {//判斷是否所有需要被授權的許可權都被授權了
                showMissingPermissionDialog();//有其中一個許可權沒被授權，顯示許可權丟失的對話方塊
                isNeedCheck = false;//不需要再進行檢查了
            }
        }
    }

    /**
     * 顯示許可權丟失的對話方塊
     */
    private void showMissingPermissionDialog() {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle(R.string.notifyTitle);
        builder.setMessage("當前應用缺少必要許可權,\n會導致部分功能使用異常。\n\n請點選\"設定\"-\"許可權\"-開啟所需許可權。\n\n");

        // 拒絕, 退出應用
        builder.setNegativeButton(R.string.cancel,
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        finish();
                    }
                });

        builder.setPositiveButton(R.string.setting,
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        startAppSettings();//呼叫系統的App設定功能
                    }
                });

        builder.setCancelable(false);

        builder.show();
    }

    /**
     *  啟動應用的設定
     */
    private void startAppSettings() {
        Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
        intent.setData(Uri.parse("package:" + getPackageName()));
        startActivity(intent);
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if(keyCode == KeyEvent.KEYCODE_BACK){//當按下鍵盤的回退按鈕則退出Activity
            this.finish();
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

}

參考：
1.https://www.jianshu.com/p/e1ab1a179fbb
2.http://www.cnblogs.com/zqlxtt/p/4873831.html
3.https://www.jianshu.com/p/b4a8b3d4f587
4.高德地圖Demo原始碼