ユーザーからの文字列入力を受け取るダイアログ android開発

2019 May 19.

https://www.ipentec.com/document/android-custom-dialog-using-dialogfragment-return-value より

[activity_main.xml]

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textViewPhrase"
        android:layout_width="0dp"
        android:layout_height="66dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.118" />

</android.support.constraint.ConstraintLayout>

[input_text_dialog.xml]

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/textViewPhraseLabel"
        android:layout_width="132dp"
        android:layout_height="27dp"
        android:text="Input text"
        app:layout_constraintBottom_toTopOf="@+id/editTextPhrase"
        tools:layout_editor_absoluteX="8dp" />

    <EditText
        android:id="@+id/editTextPhrase"
        android:layout_width="381dp"
        android:layout_height="52dp"
        android:layout_marginTop="268dp"
        android:ems="10"
        android:inputType="text"
        app:layout_constraintTop_toTopOf="parent"
        tools:layout_editor_absoluteX="8dp" />

    <Button
        android:id="@+id/buttonOK"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="52dp"
        android:layout_marginEnd="8dp"
        android:text="OK"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editTextPhrase" />
</android.support.constraint.ConstraintLayout>



MainActivity.java

package YOUR.PACKAGE;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    boolean is1stRun = true;

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

        if ( is1stRun ) {
            // get text by dialog
            InputTextDialogFragment cdf = new InputTextDialogFragment();
            cdf.show(getSupportFragmentManager(),"dialog");
            is1stRun = false;
        }
    }


    public void onReturnValue(String value) {
        TextView textViewPhrase = (TextView)findViewById(R.id.textViewPhrase);
        textViewPhrase.setText(value);
    }

}

InputTextDialogFragment.java

package YOUR.PACKAGE;

import android.app.Dialog;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.EditText;

public class InputTextDialogFragment extends DialogFragment {
    EditText editTextPhrase;

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        Dialog dialog = new Dialog(getActivity());
        dialog.getWindow().requestFeature(Window.FEATURE_NO_TITLE);
        dialog.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN);
        dialog.setContentView(R.layout.input_text_dialog);

        editTextPhrase = (dialog.findViewById(R.id.editTextPhrase));

        dialog.findViewById(R.id.buttonOK).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                String textPhrase = editTextPhrase.getText().toString();
                MainActivity callingActivity = (MainActivity) getActivity();
                callingActivity.onReturnValue(textPhrase);

                dismiss();
            }
        });

        return dialog;
    }
}