Question

我想保存高分，即使在App关闭后，也会保存我点击图像按钮多少次。我希望在应用程序运行的整个过程中看到高分但是当我尝试我的代码时，App每次都崩溃了，我不知道我犯了什么错误。

编辑：现在应用程序没有开始，但是Highscore总是零！编辑2：现在搞定了！这是适用于我的代码。

 public class MainActivity extends AppCompatActivity {
private ImageView cirlce;
private TextView Zahl;
private ImageButton reset;
int counter = 0;
int readHighscore;



@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    cirlce = (ImageView) findViewById(R.id.imageView);
    Zahl = (TextView) findViewById(R.id.Zahl);
    Zahl.setText(Integer.toString(counter));
    TextView highscore = (TextView) findViewById(R.id.highscore);
    highscore.setText(Integer.toString(readHighscore));

 cirlce.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            counter++;
            Zahl.setText(Integer.toString(counter));



   cirlce.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            counter++;
            Zahl.setText(Integer.toString(counter));
            TextView highscore = (TextView) findViewById(R.id.highscore);
            highscore.setText(Integer.toString(readHighscore));

            if (readHighscore > counter) {
                highscore.setText(Integer.toString(readHighscore));

            }
            else {
                readHighscore = counter;
                highscore.setText(Integer.toString(counter));

            }

SharedPreferences prefs = this.getSharedPreferences（“myPrefsKey”，Context.MODE_PRIVATE）; readHighscore = prefs.getInt（“highscore”，0）;

    if (readHighscore > counter) {
        highscore.setText(Integer.toString(readHighscore));

    }
    else {
        readHighscore = counter;
        highscore.setText(Integer.toString(counter));

    }
}


@Override
protected void onPause() {
    super.onPause();

    SharedPreferences prefs = this.getSharedPreferences("myPrefsKey", Context.MODE_PRIVATE);
    SharedPreferences.Editor editor = prefs.edit();
    editor.putInt("highscore", readHighscore);

    editor.commit();

}

}

这是我的XML：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/x"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="348dp"
        android:layout_height="346dp"
        app:srcCompat="@drawable/cirlce"
        tools:layout_editor_absoluteX="18dp"
        tools:layout_editor_absoluteY="82dp"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true" />

    <TextView
        android:id="@+id/Zahl"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@null"
        android:textSize="100sp"
        android:typeface="sans"
        android:layout_centerInParent="true"/>


    <TextView
        android:id="@+id/highscore"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignTop="@+id/imageView"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="42dp"
        android:text="@string/Highscore" />

</RelativeLayout>

Answer 1

您应该为高分值添加一个键

editor.putInt（“”，readHighscore）;

更改为

editor.putInt（“Score”，readHighscore）;

应用程序关闭后如何保存Highscore？

1 个答案: