DDM 2021-11-30

package com.joythis.android.simplestbrowser;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.Manifest;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;

import java.util.ArrayList;
import java.util.Map;

public class MyPhoneCaller extends AppCompatActivity {

    public final String[] NEED_THESE_PERMS = {
            //Manifest.permission.INTERNET,
            Manifest.permission.CALL_PHONE
    };

    Context mContext;
    EditText mEtTel;
    Button mBtnTel;
    ListView mLvFeedback;
    ArrayList<String> mAlFeedback;
    ArrayAdapter<String> mAd;

    /*
    GRANTED => [p1]
    DENIED => [p2, p3]
     */
    Map<Integer, ArrayList<String>> getPermissionsStatus(
        String[] pPermsToAnalyze
    ){
        boolean bGranted, bDenied;

        return null;
    }//



    View.OnClickListener mClickHandler = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            switch(v.getId()){
                case R.id.idBtnTel:
                    actionPhone();
                    break;
            }
        }
    };

    void actionPhone(){
        String strTel = mEtTel.getText().toString();
        makePhoneCall(strTel);
    }

    public final static int
        CALL_ME_ON_THIS_CODE_WHEN_RESULT_IS_READY = 321;

    void requestNecessaryPermissions(){
        this.requestPermissions(
                NEED_THESE_PERMS,
                CALL_ME_ON_THIS_CODE_WHEN_RESULT_IS_READY
        );
    }//requestNecessaryPermissions

    void makePhoneCall(String pStrTel){
        Intent intentMakePhoneCall = new Intent(
            Intent.ACTION_CALL
        );
        try {
            Uri uriTel = Uri.parse("tel:" + pStrTel);
            intentMakePhoneCall.setData(uriTel);

            startActivity(intentMakePhoneCall);
        }
        catch (Exception e){
            mAlFeedback.add(e.toString());
            mAd.notifyDataSetChanged();
        }
    }//makePhoneCall

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

        init();
    }

    void init(){
        mContext = this;
        mEtTel = findViewById(R.id.idEtTel);
        mBtnTel = findViewById(R.id.idBtnTel);
        mLvFeedback = findViewById(R.id.idLvFeedback);
        mAlFeedback = new ArrayList<>();
        mAd = new ArrayAdapter<>(
            mContext,
            android.R.layout.simple_list_item_1,
            mAlFeedback
        );
        mLvFeedback.setAdapter(mAd);

        mBtnTel.setOnClickListener(mClickHandler);

        requestNecessaryPermissions();
    }//init

    @Override
    public void onRequestPermissionsResult(
     int requestCode, //our code
     @NonNull String[] permissions, //[p1, p2]
     @NonNull int[] grantResults) //[GRANTED, DENIED]
    {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);

        boolean bGranted, bDenied;
        for (int idx=0; idx<permissions.length; idx++){
            String p = permissions[idx];
            int iUserResponse = grantResults[idx];
            bGranted =
                iUserResponse==PackageManager.PERMISSION_GRANTED;
            bDenied =
                iUserResponse==PackageManager.PERMISSION_DENIED;

            if (bGranted){
                mAlFeedback.add(p+" was granted");
            }

            if (bDenied){
                mAlFeedback.add(p+" was denied");
            }
        }//for
        mAd.notifyDataSetChanged();
    }
}