回答編集履歴
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コード追加
test
CHANGED
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@@ -9,3 +9,387 @@
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アクティビティを実行し、その終了を待って処理を続ける方法があります(以前は startActivityForResult でしたが Deprecated になりまして、 androidx で registerForActivityResult を使うようになったようです)ので、そちらを用いれば、指定したアクティビティの終了後に必要なメソッドを実行することが出来るのでは…と思います。
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----
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MainActivity.java
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```java
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package com.teratail.q361159;
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import android.app.Activity;
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import android.content.Intent;
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import android.os.Bundle;
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import android.util.Log;
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import android.widget.Button;
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import androidx.activity.result.ActivityResultLauncher;
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import androidx.activity.result.contract.ActivityResultContracts;
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import androidx.appcompat.app.AppCompatActivity;
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public class MainActivity extends AppCompatActivity {
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private static final String TAG = "MainActivity";
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private int score = 123;
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private ActivityResultLauncher<Intent> startForResult = registerForActivityResult(new ActivityResultContracts.StartActivityForResult(), result->{
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switch(result.getResultCode()) {
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case Activity.RESULT_OK:
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//Activity から戻って必要なメソッドを呼ぶ
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//Intent intent = result.getData();
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Log.d(TAG, "ActivityResultLauncher result="+result);
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break;
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case ResultActivity.RESULT_OWARU:
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Log.d(TAG, "ActivityResultLauncher OWARU");
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finish();
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break;
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}
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});
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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Button button = findViewById(R.id.button);
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button.setOnClickListener(v -> {
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//保存画面へ
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startForResult.launch(new Intent(this, ResultActivity.class)
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.putExtra(ResultActivity.PARAM_SCORE, score));
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});
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}
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}
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```
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レイアウト: activity_main.xml
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```xml
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<?xml version="1.0" encoding="utf-8"?>
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<androidx.constraintlayout.widget.ConstraintLayout
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xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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xmlns:tools="http://schemas.android.com/tools"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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tools:context=".MainActivity">
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<Button
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android:id="@+id/button"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:text="Hello World!"
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app:layout_constraintBottom_toBottomOf="parent"
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app:layout_constraintLeft_toLeftOf="parent"
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app:layout_constraintRight_toRightOf="parent"
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app:layout_constraintTop_toTopOf="parent" />
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</androidx.constraintlayout.widget.ConstraintLayout>
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```
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ResultActivity.java
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```java
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package com.teratail.q361159;
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import android.app.Activity;
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import android.content.SharedPreferences;
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import android.os.Bundle;
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import android.widget.*;
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import androidx.appcompat.app.AppCompatActivity;
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public class ResultActivity extends AppCompatActivity {
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public static final String PARAM_SCORE = "SCORE";
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public static final int RESULT_OWARU = Activity.RESULT_FIRST_USER;
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public static final String SHARED_NAME = "GAME_DATA";
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public static final String KEY_HIGHSCORE = "HIGH_SCORE";
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_result);
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TextView scoreLabel = findViewById(R.id.scoreLabel);
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TextView highScoreLabel = findViewById(R.id.highScoreLabel);
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Button bt_mouitido = findViewById(R.id.bt_mouitido);
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Button bt_hozon = findViewById(R.id.bt_hozon);
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Button bt_owaru = findViewById(R.id.bt_owaru);
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int score = getIntent().getIntExtra(PARAM_SCORE, 0);
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scoreLabel.setText(score + "");
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SharedPreferences sharedPreferences = getSharedPreferences(SHARED_NAME, MODE_PRIVATE);
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int highScore = sharedPreferences.getInt(KEY_HIGHSCORE, 0);
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highScoreLabel.setText("High Score : " + Math.max(highScore, score));
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bt_mouitido.setOnClickListener(v->{
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setResult(Activity.RESULT_OK, null);
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finish();
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});
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bt_hozon.setEnabled(highScore < score);
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bt_hozon.setOnClickListener(v->{
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SharedPreferences.Editor editor = sharedPreferences.edit();
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editor.putInt(KEY_HIGHSCORE, score);
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editor.apply();
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bt_hozon.setEnabled(false);
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});
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bt_owaru.setOnClickListener(v->{
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setResult(RESULT_OWARU, null);
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finish();
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});
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}
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}
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```
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レイアウト: activity_result.xml
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```xml
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<?xml version="1.0" encoding="utf-8"?>
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<androidx.constraintlayout.widget.ConstraintLayout
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xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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xmlns:tools="http://schemas.android.com/tools"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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tools:context=".ResultActivity">
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<TextView
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android:id="@+id/scoreLabel"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:text="0"
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app:layout_constraintBottom_toTopOf="@id/highScoreLabel"
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app:layout_constraintLeft_toLeftOf="parent"
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app:layout_constraintRight_toRightOf="parent"
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app:layout_constraintTop_toTopOf="parent" />
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<TextView
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android:id="@+id/highScoreLabel"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:text="0"
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app:layout_constraintBottom_toTopOf="@id/bt_mouitido"
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app:layout_constraintLeft_toLeftOf="parent"
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app:layout_constraintRight_toRightOf="parent"
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app:layout_constraintTop_toBottomOf="@id/scoreLabel" />
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<Button
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android:id="@+id/bt_mouitido"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:text="もう一度"
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app:layout_constraintBottom_toTopOf="@id/bt_hozon"
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348
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349
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app:layout_constraintLeft_toLeftOf="parent"
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351
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app:layout_constraintRight_toRightOf="parent"
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352
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353
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app:layout_constraintTop_toBottomOf="@id/highScoreLabel" />
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354
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355
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<Button
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android:id="@+id/bt_hozon"
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359
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android:layout_width="wrap_content"
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360
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361
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android:layout_height="wrap_content"
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362
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363
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android:text="保存"
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364
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365
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app:layout_constraintBottom_toTopOf="@id/bt_owaru"
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366
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367
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app:layout_constraintLeft_toLeftOf="parent"
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368
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369
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app:layout_constraintRight_toRightOf="parent"
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370
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371
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app:layout_constraintTop_toBottomOf="@id/bt_mouitido" />
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372
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373
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<Button
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374
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375
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android:id="@+id/bt_owaru"
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376
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377
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android:layout_width="wrap_content"
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378
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+
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379
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android:layout_height="wrap_content"
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380
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+
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381
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android:text="終わる"
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382
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+
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383
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app:layout_constraintBottom_toBottomOf="parent"
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384
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+
|
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385
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app:layout_constraintLeft_toLeftOf="parent"
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386
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+
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387
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app:layout_constraintRight_toRightOf="parent"
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388
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+
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389
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app:layout_constraintTop_toBottomOf="@id/bt_hozon" />
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390
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+
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391
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+
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392
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+
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393
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</androidx.constraintlayout.widget.ConstraintLayout>
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394
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395
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```
|
1
registerForActivityResult はクラスで無くメソッド
test
CHANGED
|
@@ -8,4 +8,4 @@
|
|
|
8
8
|
|
|
9
9
|
|
|
10
10
|
|
|
11
|
-
アクティビティを実行し、その終了を待って処理を続ける方法があります(以前は startActivityForResult でしたが Deprecated になりまして、 androidx で registerForActivityResult
|
|
11
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アクティビティを実行し、その終了を待って処理を続ける方法があります(以前は startActivityForResult でしたが Deprecated になりまして、 androidx で registerForActivityResult を使うようになったようです)ので、そちらを用いれば、指定したアクティビティの終了後に必要なメソッドを実行することが出来るのでは…と思います。
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