Android studio如何使用SharedPrefences存储页面活动？

Question

我的问题是我想将活动页面存储在sharedpreferences上例如：1）用户单击按钮A到Main2Activity2）共享首选项商店Main2Activity3）重新启动应用程序，主页将变为Main2Activity。

这是我的编码，它没有任何错误，但是没有任何作用。

希望有人可以解释并向我展示解决方案

谢谢

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    btn1 = (Button) findViewById(R.id.colour1);
    btn2 = (Button) findViewById(R.id.colour2);

    btn1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            storepage(Main2Activity.class);
            newpage();
        }
    });

    btn2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            storepage(Main3Activity.class);
            thirdpage();

        }
    });
}

private void storepage(Class page) {
    //name means give the name of sharedpreference file
    //mode private means only this application can access shared preference
    SharedPreferences sharedPreferences = getSharedPreferences("changepage", MODE_PRIVATE);
    //create edit for shared preference file
    SharedPreferences.Editor editor = sharedPreferences.edit();
    //select the type of value need to inserted
    editor.getClass();
    //save the value
    editor.apply();
}

private Class<? extends SharedPreferences> getpage() {
    //name means give the name of sharedpreference file
    //mode private means only this application can access shared preference
    SharedPreferences sharedPreferences = getSharedPreferences("changepage", MODE_PRIVATE);
    Class<? extends SharedPreferences> result = sharedPreferences.getClass();
    return result;

}
private void newpage()
{
    Intent intent = new Intent(this,Main2Activity.class);
    startActivity(intent);
}
private void thirdpage()
{
    Intent intent = new Intent(this,Main3Activity.class);
    startActivity(intent);
}

}

Answer 1

SPLASHSCREEN类

public class SplashScreenActivity extends AppCompatActivity {

 @Override
 protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    checkBtnClicked();
 }

 private void checkBtnClicked() {
    boolean isFirstRun = getSharedPreferences("PREF", MODE_PRIVATE)
            .getBoolean("isBtnClicked", false);

    if (isBtnClicked) {
        startActivity(new Intent(this, Main2Activity.class));
        finish();

    } else {
        startActivity(new Intent(this, //activity where button is));
        finish();
    }
 }
}

活动按钮在哪里

btn1.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        //store boolean to sharedpreferences
    }
});