Java 为什么';“我的”;“共享参考资料”;工作
问题是,“Wizard2Activity”中的文本字段只显示“nothing”,而不是用户在“Wizard1”中的“EditText”中键入的内容 Wizard1.java:Java 为什么';“我的”;“共享参考资料”;工作,java,android,sharedpreferences,Java,Android,Sharedpreferences,问题是,“Wizard2Activity”中的文本字段只显示“nothing”,而不是用户在“Wizard1”中的“EditText”中键入的内容 Wizard1.java: package com.CENSORED.CENSORED; import android.app.Activity; import android.content.Intent; import android.content.SharedPreferences; import android.content.Shar
package com.CENSORED.CENSORED;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class Wizard1 extends Activity {
public static final String PREFS ="examplePrefs";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_wizard1);
final EditText et = (EditText)findViewById(R.id.editText1);
Button nextAct = (Button)findViewById(R.id.button1);
nextAct.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v){
String message = et.getText().toString();
SharedPreferences examplePrefs = getSharedPreferences(PREFS, 0);
Editor editor = examplePrefs.edit();
editor.putString("usermessage", message);
editor.commit();
Intent i = new Intent(getApplicationContext(),
Wizard2Activity.class);
startActivity(i);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is
present.
getMenuInflater().inflate(R.menu.wizard1, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
和向导2活动:
package com.CENSORED.CENSORED;
import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
public class Wizard2Activity extends Activity {
public static final String PREFS ="examplePrefs";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.wizard2);
TextView tv = (TextView)findViewById(R.id.textView1);
SharedPreferences example = getSharedPreferences(PREFS, 0);
String userString = example.getString("userMessage", "nothing");
tv.setText(userString);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is
present.
getMenuInflater().inflate(R.menu.wizard2, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
谢谢你的帮助!:) 因为方法
editor.putString("usermessage", message);
及
使用不同的键。您应该更改
String userString = example.getString("userMessage", "nothing");
到
键是
usermessage
。只是打字错误。天哪!谢谢你,兄弟,关键真的是问题所在@AndroidDev,如果某个答案对您有所帮助,您应该通过单击它旁边的复选标记来接受它:-)谢谢您提及它!:)@AndroidDev我希望你能从中吸取教训。开始将密钥放入专门为此设计的类中,并使密钥成为公共静态最终密钥,以便您可以从任何地方访问它们
String userString = example.getString("userMessage", "nothing");
String userString = example.getString("usermessage", "nothing");