許可ダイアログの表示

　android6.0(marshmallow)以降では、permissionについて明示的な許可が必要になります。googleのdeveloper向けのサイトを元に、不完全なのですが、このように許可を作ってみました。stackoverflowには独自メソッドをつくるやり方もあったのですが・・・

if (ContextCompat.checkSelfPermission(this,
        Manifest.permission.READ_CONTACTS)
        != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this,
        Manifest.permission.READ_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) {
    if (ActivityCompat.shouldShowRequestPermissionRationale(this,
            Manifest.permission.READ_CONTACTS) || ActivityCompat.shouldShowRequestPermissionRationale(this,
            Manifest.permission.READ_PHONE_STATE)) {
    } else {
        ActivityCompat.requestPermissions(this,
                new String[]{Manifest.permission.READ_CONTACTS, Manifest.permission.READ_PHONE_STATE},
                MY_PERMISSIONS_REQUEST_READ_CONTACTS);
    }
}

 　最初に公開してきた時から、色々と変更していますので、あらためて一部のクラスを自分の備忘録として書いておきます。

　MainActivity.java

import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    private final int MY_PERMISSIONS_REQUEST_READ_CONTACTS = 10;

    @Override
    public void onRequestPermissionsResult(int requestCode,
                                           String permissions[], int[] grantResults) {
        switch (requestCode) {
            case MY_PERMISSIONS_REQUEST_READ_CONTACTS: {
                if (grantResults.length > 0
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                } else {
                }
                return;
            }
        }
    }

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

        if (ContextCompat.checkSelfPermission(this,
                Manifest.permission.READ_CONTACTS)
                != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this,
                Manifest.permission.READ_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) {
            if (ActivityCompat.shouldShowRequestPermissionRationale(this,
                    Manifest.permission.READ_CONTACTS) || ActivityCompat.shouldShowRequestPermissionRationale(this,
                    Manifest.permission.READ_PHONE_STATE)) {
            } else {
                ActivityCompat.requestPermissions(this,
                        new String[]{Manifest.permission.READ_CONTACTS, Manifest.permission.READ_PHONE_STATE},
                        MY_PERMISSIONS_REQUEST_READ_CONTACTS);
            }
        }

        Button instructionButton = (Button) findViewById(R.id.instruction);
        assert instructionButton != null;
        instructionButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(getApplication(), Instruction.class);
                startActivity(intent);
            }
        });

        Button instruction2Button = (Button) findViewById(R.id.instruction2);
        assert instruction2Button != null;
        instruction2Button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(getApplication(), Instruction2.class);
                startActivity(intent);
            }
        });

        Button instruction3Button = (Button) findViewById(R.id.instruction3);
        assert instruction3Button != null;
        instruction3Button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(getApplication(), Instruction3.class);
                startActivity(intent);
            }
        });

        Button instruction4Button = (Button) findViewById(R.id.instruction4);
        assert instruction4Button != null;
        instruction4Button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(getApplication(), Instruction4.class);
                startActivity(intent);
            }
        });

        PackageInfo packageInfo = null;
        TextView textView = (TextView)findViewById(R.id.version);
        try {
            packageInfo = getPackageManager().getPackageInfo("com.rnma2ri.saftyapp", PackageManager.GET_META_DATA);
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        assert textView != null;
        assert packageInfo != null;
        textView.setText("versionCode : "+packageInfo.versionCode+" / "+"versionName : "+packageInfo.versionName);
    }
}

MyDialog.java

import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Window;

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

public class MyDialog extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_my_dialog);

        List<String> list = new ArrayList<String>();
        list.add("風邪で声が変わったは詐欺！");
        list.add("電話番号が変わったは詐欺！");
        list.add("医療費還付金があるは詐欺！");
        list.add("詐欺の電話に注意しましょう！");
        final CharSequence[] charSequences = list.toArray(new String[list.size()]);
        AlertDialog.Builder alert = new AlertDialog.Builder(this, R.style.Theme_AppCompat_DialogActivity);
        alert.setTitle(R.string.dialog_title)
                .setIcon(R.mipmap.btn1)
                .setItems(charSequences, new DialogInterface.OnClickListener(){
                    public void onClick(DialogInterface dialog, int item) {
                        String string = charSequences[item].toString();
                    }
                })
                .setPositiveButton(R.string.dialog_button, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        MyDialog.this.finish();
                    }
                });
        alert.create().show();
    }
}

PhoneReceiver.java

import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.provider.ContactsContract;
import android.telephony.PhoneNumberUtils;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;

class PhoneReceiver extends PhoneStateListener {
    private int totalCount = 0;
    private Context context;

    PhoneReceiver(Context context) {
        this.context = context;
    }

    // 通話状態の変化に応じて表示を変更する
    public void onCallStateChanged(int state, String incomingNumber) {
        super.onCallStateChanged(state, incomingNumber);

        switch (state) {
            // 着信時の処理内容
            case TelephonyManager.CALL_STATE_RINGING:

                // ContentResolverを使って、端末内の番号を取得し、着信中の番号と突き合わせる
                Cursor addressTable = context.getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null);
                try {
                    if (addressTable != null) {
                        while (addressTable.moveToNext()) {
                            String phoneNumber = addressTable.getString(addressTable.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
                            for (int i = 0; i < addressTable.getCount(); i++) {
                                int count = BooleanSum(PhoneNumberUtils.compare(phoneNumber, incomingNumber));
                                totalCount += count;
                            }
                        }
                    }
                } finally {
                    assert addressTable != null;
                    addressTable.close();
                }
                if (totalCount < 1) {
                    Intent i = new Intent(context.getApplicationContext(), MyDialog.class);
                    i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                    context.getApplicationContext().startActivity(i);
                }
                break;
        }
    }

    // PhoneNumberUtilメソッドのBoolean型の戻り値をint型(0 or 1)に変換するメソッド
    private int BooleanSum(Boolean exchanger) {
        if (exchanger) return 1;
        else {
            return 0;
        }
    }
}

PhoneStateReceiver.java

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;

public class PhoneStateReceiver extends BroadcastReceiver {
    // 各フィールドの定義
    TelephonyManager manager;
    PhoneReceiver phoneStateListener;
    static boolean listener = false;

    // intent情報を処理する
    @Override
    public void onReceive(Context context, Intent intent) {
        // PhoneReceiverインスタンスの生成
        phoneStateListener = new PhoneReceiver(context);
        // TelephonyManagerインスタンスの生成
        manager =((TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE));

        if(!listener) {
            manager.listen(phoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);
            listener = true;
        }
    }
}

　MainActivity.javaの最後では、versioncodeを表示するようにしています。

　まだまだ不完全ですが、一応これでひと段落です。間違いや効率的なやり方があれば教えていただけると助かります。