将sharedPreference值赋给构建中的一个变量

import android.content.SharedPreferences;
import android.preference.PreferenceManager;

public class ExampleActivity extends AppCompatActivity {

    private String myVariable;

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

        // 获取 SharedPreferences 对象
        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);

        // 读取 SharedPreferences 中的值并赋给变量
        myVariable = sharedPreferences.getString("myKey", "defaultValue");

        // 使用变量
        TextView textView = findViewById(R.id.textView);
        textView.setText(myVariable);
    }
}

String myVariable = sharedPreferences.getString("myKey", "defaultValue");

int myIntVariable = sharedPreferences.getInt("myIntKey", 0);

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>