Android Silent Mode Toggle

Question

I started reading Android for dummies and I am trying to make my first app that is Silent Mode Toggle.

Now the problem I\'m facing is:

In the layout, I need som

Answer 1

It sounds like you want a textview that says whether silent mode is/isnt activated? ie just a small bit of text near a button, that shows status? And your buttons to dynamically appear/dissapear as well?

TextView tv = (TextView)findviewbyid(R.id.relevanttextview); //text above button/wherever
Button bt = (Button)findviewbyid(R.id.relevantbutton); //button to make appear/dissapear 

if(vibrate is on){
tv.setText("vibrate is on");
bt.setVisibility(View.VISIBLE); //make button appear
}

if(normal mode is on){
tv.setText("normal");
bt.setVisibility(View.INVISIBLE); //make button dissapear
}

etc...

Answer 2

AndriodManifest.xml
<uses-permission android:name="android.permission.ACCESS_NOTIFICATION_POLICY"/>


package com.example.myapplication;

import android.Manifest;
import android.app.AlertDialog;
import android.app.NotificationManager;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.database.ContentObserver;
import android.media.AudioManager;
import android.os.Build;
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Handler;
import android.provider.Settings;
import android.service.notification.StatusBarNotification;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.ImageView;
import static android.app.NotificationManager.*;


public class MainActivity extends AppCompatActivity {
    AudioManager audioManager;
    //private int CAMREA_CODE = 1;

    private int MOD_ADO_CODE=1;
    private NotificationManager mNotificationManager;
    private StatusBarNotification[] mText;
    private int MZenMode;
    private static final String TAG = "ZenModeObserver";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        audioManager = (AudioManager) getSystemService(AUDIO_SERVICE);
        setContentView(R.layout.activity_main);
        FrameLayout contentView = (FrameLayout) findViewById(R.id.content);
        mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        contentView.setOnClickListener(
                new View.OnClickListener() {
                    public void onClick(View v) {
                        //RingerHelper.performToggle(audioManager);
                        //Toast.makeText(MainActivity.this, Policy, Toast.LENGTH_SHORT).show();
                        try {
                            MZenMode=logZenModeState();
                        } catch (Settings.SettingNotFoundException e) {
                            e.printStackTrace();
                        }
                        if (MZenMode==2)
                            changeInterruptionFiler(INTERRUPTION_FILTER_ALL);
                        else
                            changeInterruptionFiler(INTERRUPTION_FILTER_NONE);
                        updateUi();
                    }
                }
        );
    }
    private void updateUi() {
        ImageView imageView = (ImageView) findViewById(R.id.phone_icon);
        int phoneImage = MZenMode==2?R.drawable.ringer_off : R.drawable.ringer_on;
        //int phoneImage = RingerHelper.isPhoneSilent(audioManager) ? R.drawable.ringer_off : R.drawable.ringer_on;
        imageView.setImageResource(phoneImage);
    }

    protected void changeInterruptionFiler(int interruptionFilter) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            if (mNotificationManager.isNotificationPolicyAccessGranted()) {
                mNotificationManager.setInterruptionFilter(interruptionFilter);

            } else {
                Intent intent = new Intent(Settings.ACTION_NOTIFICATION_POLICY_ACCESS_SETTINGS);
                startActivity(intent);
            }
        }
    }

    private int logZenModeState() throws Settings.SettingNotFoundException {
        int zenModeValue = Settings.Global.getInt(getContentResolver(), "zen_mode");
        return zenModeValue;
    }

    private class ZenModeObserver extends ContentObserver {

        ZenModeObserver(Handler handler) {
            super(handler);
        }
    }
        @Override
    protected void onResume()
    {
        super.onResume();
        updateUi();
    }

}