Android 进阶之旅 | 打开通知设置页面

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在打开app的时候,提示用户打开通知设置页面 , 首先我们要判断是否开启了当前应用的通知

package com.example.notificationtest;

import java.lang.reflect.Field;
import java.lang.reflect.Method;
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.AppOpsManager;
import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.os.Build;
import android.os.Bundle;
import android.widget.TextView;

@TargetApi(Build.VERSION_CODES.KITKAT)
public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        TextView tvHint = (TextView) findViewById(R.id.tvHint);

        tvHint.setText("通知开关是否打开-->" + isNotificationEnable(this));
    }

    /*
     * 判断通知权限是否打开
     */
    private boolean isNotificationEnable(Context context) {
        AppOpsManager mAppOps = (AppOpsManager)     context.getSystemService(APP_OPS_SERVICE);
        ApplicationInfo appInfo = context.getApplicationInfo();

        String pkg = context.getApplicationContext().getPackageName();
        int uid = appInfo.uid;

        Class appOpsClass = null; /* Context.APP_OPS_MANAGER */

        try{
            appOpsClass = Class.forName(AppOpsManager.class.getName());
            Method checkOpNoThrowMethod  = appOpsClass.getMethod("checkOpNoThrow", Integer.TYPE, Integer.TYPE, String.class);

            Field opPostNotificationValue = appOpsClass.getDeclaredField("OP_POST_NOTIFICATION");
            int value = (int)opPostNotificationValue.get(Integer.class);
            return ((int)checkOpNoThrowMethod.invoke(mAppOps,value, uid, pkg) == AppOpsManager.MODE_ALLOWED);
        }catch(Exception e){
            e.printStackTrace();
        }   
        return true;
    }
}

这个方法很好,但是还存在缺陷。AppOpsManager这个类是api 19以上才添加的,所以android4.3以下这个方法就失效了。

据说android api 24可以使用NotificationManagerCompat.areNotificationsEnabled()来判断。查看官方Api,确实存在这个方法,这样来判断就方便很多了。


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NotificationManagerCompat notificationManagerCompat =     NotificationManagerCompat.from(context);
boolean areNotificationsEnabled = notificationManagerCompat.areNotificationsEnabled();

然后在没有打开通知的情况下,提醒用户打开设置页面,设置通知

android 跳转到应用通知设置界面的示例

4.4以下并没有提过从app跳转到应用通知设置页面的Action,可考虑跳转到应用详情页面,下面是直接跳转到应用通知设置的代码:

if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
      Intent intent = new Intent();
      intent.setAction("android.settings.APP_NOTIFICATION_SETTINGS");
      intent.putExtra("app_package", getActivity().getPackageName());
      intent.putExtra("app_uid", getActivity().getApplicationInfo().uid);
      startActivity(intent);
    } else if (android.os.Build.VERSION.SDK_INT == Build.VERSION_CODES.KITKAT) {
      Intent intent = new Intent();
      intent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
      intent.addCategory(Intent.CATEGORY_DEFAULT);
      intent.setData(Uri.parse("package:" + getActivity().getPackageName()));
      startActivity(intent);
    }

跳转到应用详情页面的代码如下

Intent localIntent = new Intent();
    localIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    if (Build.VERSION.SDK_INT >= 9) {
      localIntent.setAction("android.settings.APPLICATION_DETAILS_SETTINGS");
      localIntent.setData(Uri.fromParts("package", getActivity().getPackageName(), null));
    } else if (Build.VERSION.SDK_INT <= 8) {
      localIntent.setAction(Intent.ACTION_VIEW);
      localIntent.setClassName("com.android.settings", "com.android.settings.InstalledAppDetails");
      localIntent.putExtra("com.android.settings.ApplicationPkgName", getActivity().getPackageName());
    }
    startActivity(localIntent);

对于检测app是否开启通知,同样是针对4.4以上的系统才有效:

NotificationManagerCompat manager =     NotificationManagerCompat.from(App.getInstance().getContext());
boolean isOpened = manager.areNotificationsEnabled();

4.4以下调用该方法并不会出错,只是全部返回true,默认开启状态

Android判断APP通知权限是否打开

场景:判断用户是否屏蔽了应用的推送权限
NotificationManagerCompat.from(context).areNotificationsEnabled()

参考资料:Android:判断应用程序接收通知开关是否打开
android 跳转到应用通知设置界面的示例

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