如何从另一个活动中读取 SharedPreferences? [英] how can i read a SharedPreferences from another activity?

问题描述

    sharedPreferences = getSharedPreferences("HTTP_HELPER_PREFS", Context.MODE_PRIVATE);
    editor = sharedPreferences.edit();

    // get the IP address and port number from the last time the user used the app,
    // put an empty string "" is this is the first time.
    editTextIPAddress.setText(sharedPreferences.getString(PREF_IP, ""));
    editTextPortNumber.setText(sharedPreferences.getString(PREF_PORT, ""));
    confbutton.setOnClickListener(this);

}


@Override
public void onClick(View v) {
    // get the ip address
    String ipAddress = editTextIPAddress.getText().toString().trim();
    // get the port number
    String portNumber = editTextPortNumber.getText().toString().trim();

    editor.putString(PREF_IP, ipAddress); // 
    editor.putString(PREF_PORT, portNumber); 
    editor.commit(); 
    onBackPressed();

这是我的代码，我创建了第二个活动来获取 IP 地址和端口号，现在我需要在主活动中读取 SharedPreferences

that's my code i created a second Activity to get the ip adresse and the port number now i need to read that SharedPreferencesin the main activity

推荐答案

类似这样的事情

SharedPreferences prefs = getSharedPreferences("HTTP_HELPER_PREFS", Context.MODE_PRIVATE);
String ipAddress = prefs.getString(PREF_IP, ipAddress); 
String portNumber = prefs.getString(PREF_PORT, portNumber);

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