如何存储微调器选定的值并在另一个活动中检索它以进行显示

时间:2014-12-13 21:18:20

标签: android sharedpreferences android-spinner

我已经在谷歌搜索了一个解决方案,并在堆栈溢出。我也知道这可能是堆栈溢出中提出的另一个问题的重复,但我尝试了提供的代码片段,但没有一个工作。喜欢:Taking user selection in a spinner, storing it in sharedPrefences, and using it in another activitynot getting integer value from SharedPreference以及http://www.acnenomor.com/4379973p1/how-to-save-spinner-selecteditem-to-sharedpreferences

这是我的问题。我有第一个活动,有两个来自本教程http://www.mkyong.com/android/android-spinner-drop-down-list-example/的微调器。按下提交按钮,id就像将所选值保存在SharesPreferences.On上进入第二个活动,我检索选定的值并将其显示在文本视图上。因此,在下一个应用程序启动时,我会转到第二个活动以查找显示的已保存值。我真的被搁浅了。请指出我正确的方向。非常感谢任何帮助。

主要活动



public class MyAndroidAppActivity extends Activity {
 
  private Spinner spinner1, spinner2;
  private Button btnSubmit;
 
  @Override
  public void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	setContentView(R.layout.main);
 
	addItemsOnSpinner2();
	addListenerOnButton();
	addListenerOnSpinnerItemSelection();
  }
 
  // add items into spinner dynamically
  public void addItemsOnSpinner2() {
 
	spinner2 = (Spinner) findViewById(R.id.spinner2);
	List<String> list = new ArrayList<String>();
	list.add("list 1");
	list.add("list 2");
	list.add("list 3");
	ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,
		android.R.layout.simple_spinner_item, list);
	dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
	spinner2.setAdapter(dataAdapter);
  }
 
  public void addListenerOnSpinnerItemSelection() {
	spinner1 = (Spinner) findViewById(R.id.spinner1);
	spinner1.setOnItemSelectedListener(new CustomOnItemSelectedListener());
  }
 
  // get the selected dropdown list value
  public void addListenerOnButton() {
 
	spinner1 = (Spinner) findViewById(R.id.spinner1);
	spinner2 = (Spinner) findViewById(R.id.spinner2);
	btnSubmit = (Button) findViewById(R.id.btnSubmit);
 
	btnSubmit.setOnClickListener(new OnClickListener() {
 
	  @Override
	  public void onClick(View v) {
 
	    Toast.makeText(MyAndroidAppActivity.this,
		"OnClickListener : " + 
                "\nSpinner 1 : "+ String.valueOf(spinner1.getSelectedItem()) + 
                "\nSpinner 2 : "+ String.valueOf(spinner2.getSelectedItem()),
			Toast.LENGTH_SHORT).show();
	  }
 
	});
  }
}
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CustomOnItemSelectedListener.java

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public class CustomOnItemSelectedListener implements OnItemSelectedListener {
 
  public void onItemSelected(AdapterView<?> parent, View view, int pos,long id) {
	Toast.makeText(parent.getContext(), 
		"OnItemSelectedListener : " + parent.getItemAtPosition(pos).toString(),
		Toast.LENGTH_SHORT).show();
  }
 
  @Override
  public void onNothingSelected(AdapterView<?> arg0) {
	// TODO Auto-generated method stub
  }
 
}
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2 个答案:

答案 0 :(得分:0)

如果您想在下次发布活动时设置文字,则应阅读偏好设置中的文字,并将其设置为活动onResume()方法中的文字视图。 希望它有所帮助!

编辑: 如果要在首选项中设置int:

SharedPreferences sp = getSharedPreferences("your_prefs", Activity.MODE_PRIVATE);
SharedPreferences.Editor editor = sp.edit();
editor.putInt("your_int_key", yourIntValue);
editor.commit();

然后,在你的onResume()方法中:

 SharedPreferences sp = getSharedPreferences("your_prefs", Activity.MODE_PRIVATE);
 int savedInt = sp.getInt("your_int_key", 0);

正如您刚刚分享的链接中所述;)

答案 1 :(得分:0)

我终于能够做到了。我使用了本教程(http://androidopentutorials.com/android-sharedpreferences-tutorial-and-example/) 我修改了这段代码以适合我想要的

public void onClick(View v) {
text = String.valueOf(spinner1.getSelectedItem()) + String.valueOf(spinner2.getSelectedItem());
					sharedPreference.save(context, text);

谢谢你们。赞赏。