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Androidアプリで画面を回転させると、変数（ファウル、ゴールなど）がリセットされます。私は彼らが画面の回転にリセットしないようにしたいと思います。どのようにできるのか？ 問題はアクティビティライフサイクルに関連していることは知っていますが、非常に短時間（2か月）から開発するので、解決できません。 これはMainActivity.javaアンドロイドアプリの画面回転変数を保存する
package com.marconota.serieasoccerscorekeeper;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import org.apache.commons.lang3.StringUtils;
import java.lang.String;
public class MainActivity extends AppCompatActivity {
String scorerNames = "Marcatori: ";
String lastScorer = "";
int goalsForTeamA = 0;
int goalsForTeamB = 0;
int shotsForTeamA = 0;
int shotsForTeamB = 0;
int foulsForTeamA = 0;
int foulsForTeamB = 0;
int cornersForTeamA = 0;
int cornersForTeamB = 0;
int yellowCardsForTeamA = 0;
int yellowCardsForTeamB = 0;
int redCardsForTeamA = 0;
int redCardsForTeamB = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
// Displays scorers list
public void displayScorers(String score) {
TextView scoreView = (TextView) findViewById(R.id.listaMarcatori);
scoreView.setText(String.valueOf(score));
}
/**
* Displays score for Team A.
*/
public void displayGoalsForTeamA(int score) {
TextView scoreView = (TextView) findViewById(R.id.showGoalsForTeamA);
scoreView.setText(String.valueOf(score));
}
/**
* Displays score for Team B.
*/
public void displayGoalsForTeamB(int score) {
TextView scoreView = (TextView) findViewById(R.id.showGoalsForTeamB);
scoreView.setText(String.valueOf(score));
}
/**
* Displays shots for Team A.
*/
public void displayShotsForTeamA(int score) {
TextView scoreView = (TextView) findViewById(R.id.showShotsForTeamA);
scoreView.setText(String.valueOf(score));
}
/**
* Displays shots for Team B.
*/
public void displayShotsForTeamB(int score) {
TextView scoreView = (TextView) findViewById(R.id.showShotsForTeamB);
scoreView.setText(String.valueOf(score));
}
/**
* Displays corners for Team A.
*/
public void displayCornersForTeamA(int score) {
TextView scoreView = (TextView) findViewById(R.id.showCornersForTeamA);
scoreView.setText(String.valueOf(score));
}
/**
* Displays corners for Team B.
*/
public void displayCornersForTeamB(int score) {
TextView scoreView = (TextView) findViewById(R.id.showCornersForTeamB);
scoreView.setText(String.valueOf(score));
}
/**
* Displays fouls for Team A.
*/
public void displayFoulsForTeamA(int score) {
TextView scoreView = (TextView) findViewById(R.id.showFoulsForTeamA);
scoreView.setText(String.valueOf(score));
}
/**
* Displays fouls for Team B.
*/
public void displayFoulsForTeamB(int score) {
TextView scoreView = (TextView) findViewById(R.id.showFoulsForTeamB);
scoreView.setText(String.valueOf(score));
}
/**
* Displays yellow cards for Team A.
*/
public void displayYellowCardsForTeamA(int score) {
TextView scoreView = (TextView) findViewById(R.id.showYellowCardsForTeamA);
scoreView.setText(String.valueOf(score));
}
/**
* Displays yellow cards for Team B.
*/
public void displayYellowCardsForTeamB(int score) {
TextView scoreView = (TextView) findViewById(R.id.showYellowCardsForTeamB);
scoreView.setText(String.valueOf(score));
}
/**
* Displays red cards for Team A.
*/
public void displayRedCardsForTeamA(int score) {
TextView scoreView = (TextView) findViewById(R.id.showRedCardsForTeamA);
scoreView.setText(String.valueOf(score));
}
/**
* Displays red cards for Team B.
*/
public void displayRedCardsForTeamB(int score) {
TextView scoreView = (TextView) findViewById(R.id.showRedCardsForTeamB);
scoreView.setText(String.valueOf(score));
}
// Adds goal for team A
public void addOneGoalForTeamA(View view) {
goalsForTeamA = goalsForTeamA + 1;
displayGoalsForTeamA(goalsForTeamA);
}
// Adds goal for team B
public void addOneGoalForTeamB(View view) {
goalsForTeamB = goalsForTeamB + 1;
displayGoalsForTeamB(goalsForTeamB);
}
// Subtracts goal for team A and prevents stat provides negative number
public void subtractOneGoalForTeamA(View view) {
if (goalsForTeamA>0)
{goalsForTeamA = goalsForTeamA - 1;
displayGoalsForTeamA(goalsForTeamA);
}
else
{goalsForTeamA = 0;
displayGoalsForTeamA(goalsForTeamA);
}
}
// Subtracts goal for team B and prevents stat provides negative number
public void subtractOneGoalForTeamB(View view) {
if (goalsForTeamB>0)
{goalsForTeamB = goalsForTeamB - 1;
displayGoalsForTeamB(goalsForTeamB);
}
else
{goalsForTeamB = 0;
displayGoalsForTeamB(goalsForTeamB);
}
}
// Adds shot for team A
public void addOneShotForTeamA(View view) {
shotsForTeamA = shotsForTeamA + 1;
displayShotsForTeamA(shotsForTeamA);
}
// Adds shot for team B
public void addOneShotForTeamB(View view) {
shotsForTeamB = shotsForTeamB + 1;
displayShotsForTeamB(shotsForTeamB);
}
// Subtracts shot for team A and prevents stat provides negative number
public void subtractOneShotForTeamA(View view) {
if (shotsForTeamA>0)
{shotsForTeamA = shotsForTeamA - 1;
displayShotsForTeamA(shotsForTeamA);
}
else
{shotsForTeamA = 0;
displayShotsForTeamA(shotsForTeamA);
}
}
// Subtracts shot for team B and prevents stat provides negative number
public void subtractOneShotForTeamB(View view) {
if (shotsForTeamB>0)
{shotsForTeamB = shotsForTeamB - 1;
displayShotsForTeamB(shotsForTeamB);
}
else
{shotsForTeamB = 0;
displayShotsForTeamB(shotsForTeamB);
}
}
// Adds corner for team A
public void addOneCornerForTeamA(View view) {
cornersForTeamA = cornersForTeamA + 1;
displayCornersForTeamA(cornersForTeamA);
}
// Adds corner for team B
public void addOneCornerForTeamB(View view) {
cornersForTeamB = cornersForTeamB + 1;
displayCornersForTeamB(cornersForTeamB);
}
// Subtracts corner for team A and prevents stat provides negative number
public void subtractOneCornerForTeamA(View view) {
if (cornersForTeamA>0)
{cornersForTeamA = cornersForTeamA - 1;
displayCornersForTeamA(cornersForTeamA);
}
else
{cornersForTeamA = 0;
displayCornersForTeamA(cornersForTeamA);
}
}
// Subtracts corner for team B and prevents stat provides negative number
public void subtractOneCornerForTeamB(View view) {
if (cornersForTeamB>0)
{cornersForTeamB = cornersForTeamB - 1;
displayCornersForTeamB(cornersForTeamB);
}
else
{cornersForTeamB = 0;
displayCornersForTeamB(cornersForTeamB);
}
}
// Adds foul for team A
public void addOneFoulForTeamA(View view) {
foulsForTeamA = foulsForTeamA + 1;
displayFoulsForTeamA(foulsForTeamA);
}
// Adds foul for team B
public void addOneFoulForTeamB(View view) {
foulsForTeamB = foulsForTeamB + 1;
displayFoulsForTeamB(foulsForTeamB);
}
// Subtracts foul for team A and prevents stat provides negative number
public void subtractOneFoulForTeamA(View view) {
if (foulsForTeamA>0)
{foulsForTeamA = foulsForTeamA - 1;
displayFoulsForTeamA(foulsForTeamA);
}
else
{foulsForTeamA = 0;
displayFoulsForTeamA(foulsForTeamA);
}
}
// Subtracts foul for team B and prevents stat provides negative number
public void subtractOneFoulForTeamB(View view) {
if (foulsForTeamB>0)
{foulsForTeamB = foulsForTeamB - 1;
displayFoulsForTeamB(foulsForTeamB);
}
else
{foulsForTeamB = 0;
displayFoulsForTeamB(foulsForTeamB);
}
}
// Adds yellow card for team A
public void addOneYellowCardForTeamA(View view) {
yellowCardsForTeamA = yellowCardsForTeamA + 1;
displayYellowCardsForTeamA(yellowCardsForTeamA);
}
// Adds yellow card for team B
public void addOneYellowCardForTeamB(View view) {
yellowCardsForTeamB = yellowCardsForTeamB + 1;
displayYellowCardsForTeamB(yellowCardsForTeamB);
}
// Subtracts yellow card for team A and prevents stat provides negative number
public void subtractOneYellowCardForTeamA(View view) {
if (yellowCardsForTeamA>0)
{yellowCardsForTeamA = yellowCardsForTeamA - 1;
displayYellowCardsForTeamA(yellowCardsForTeamA);
}
else
{yellowCardsForTeamA = 0;
displayYellowCardsForTeamA(yellowCardsForTeamA);
}
}
// Subtracts yellow card for team B and prevents stat provides negative number
public void subtractOneYellowCardForTeamB(View view) {
if (yellowCardsForTeamB>0)
{yellowCardsForTeamB = yellowCardsForTeamB - 1;
displayYellowCardsForTeamB(yellowCardsForTeamB);
}
else
{yellowCardsForTeamB = 0;
displayYellowCardsForTeamB(yellowCardsForTeamB);
}
}
// Adds red card for team A
public void addOneRedCardForTeamA(View view) {
redCardsForTeamA = redCardsForTeamA + 1;
displayRedCardsForTeamA(redCardsForTeamA);
}
// Adds red card for team B
public void addOneRedCardForTeamB(View view) {
redCardsForTeamB = redCardsForTeamB + 1;
displayRedCardsForTeamB(redCardsForTeamB);
}
// Subtracts red card for team A and prevents stat provides negative number
public void subtractOneRedCardForTeamA(View view) {
if (redCardsForTeamA>0)
{redCardsForTeamA = redCardsForTeamA - 1;
displayRedCardsForTeamA(redCardsForTeamA);
}
else
{redCardsForTeamA = 0;
displayRedCardsForTeamA(redCardsForTeamA);
}
}
// Subtracts red card for team B and prevents stat provides negative number
public void subtractOneRedCardForTeamB(View view) {
if (redCardsForTeamB>0)
{redCardsForTeamB = redCardsForTeamB - 1;
displayRedCardsForTeamB(redCardsForTeamB);
}
else
{redCardsForTeamB = 0;
displayRedCardsForTeamB(redCardsForTeamB);
}
}
// Resets match stats
public void resetMatchStats(View view) {
scorerNames = "Marcatori: ";
displayScorers(scorerNames);
lastScorer = "";
goalsForTeamA = 0;
displayGoalsForTeamA(goalsForTeamA);
goalsForTeamB = 0;
displayGoalsForTeamB(goalsForTeamB);
shotsForTeamA = 0;
displayShotsForTeamA(shotsForTeamA);
shotsForTeamB = 0;
displayShotsForTeamB(shotsForTeamB);
foulsForTeamA = 0;
displayFoulsForTeamA(foulsForTeamA);
foulsForTeamB = 0;
displayFoulsForTeamB(foulsForTeamB);
cornersForTeamA = 0;
displayCornersForTeamA(cornersForTeamA);
cornersForTeamB = 0;
displayCornersForTeamB(cornersForTeamB);
yellowCardsForTeamA = 0;
displayYellowCardsForTeamA(yellowCardsForTeamA);
yellowCardsForTeamB = 0;
displayYellowCardsForTeamB(yellowCardsForTeamB);
redCardsForTeamA = 0;
displayRedCardsForTeamA(redCardsForTeamA);
redCardsForTeamB = 0;
displayRedCardsForTeamB(redCardsForTeamB);
}
//Adds last scorer in editText to scorers list and displays the updated scorers list
//If the add scorer field is empty, it doesn't update variable lastScorer.
//Else it takes the value from add scorer field, assign it to variable lastScorer, then it displays updated scorers
public void addScorer(View view) {
EditText addScorer = (EditText) findViewById(R.id.addScorerField);
String lastScorerPrep = addScorer.getText().toString();
if (StringUtils.isEmpty(lastScorerPrep))
{
}
else {
lastScorer = lastScorerPrep;
scorerNames = scorerNames + lastScorer + ", ";
displayScorers(scorerNames);
}
}
//Deletes last scorer from scorers list
public void deleteLastScorer(View view) {
scorerNames = scorerNames.replaceFirst((lastScorer + ", "), "");
displayScorers(scorerNames);
}
}
が私を助けてくれてありがとうです。
https://developer.android.com/guide/components/activities/activity-lifecycle.html#saras 'onSaveInstanceState' –
を使用します。http：/を/stackoverflow.com/questions/151777/saving-android-activity-state-using-save-instance-state – vadber
少なくともあなたの問題をGoogleで検索したようには思われません – peter