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我對我所做的事情完全陌生,我真的認爲我完全錯了。將重要的應用程序內容保存到xml資源中
無論如何......我正在嘗試製作一個測試應用程序,您在editText中編寫了一些字符串,應用程序應該將它保存到下一次啓動中。
我試圖通過xml資源做到這一點,它似乎完全搞砸了。請幫幫我!
這是我的佈局看起來像:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".Filedemo" >
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="130dp"
android:text="finish" />
<EditText
android:id="@+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="111dp"
android:ems="10"
android:inputType="textMultiLine" >
<requestFocus />
</EditText>
</RelativeLayout>
這是我想要的字符串保存到XML:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<item name="thetext" type="id"/>
<item name="textik" type="whatever">
<thetext>hello</thetext>
</item>
</resources>
...和finaly我的Java代碼:
public class Filedemo extends Activity {
private Document doc;
private EditText etext;
private Button but;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_filedemo);
etext = (EditText)findViewById(R.id.editText1);
but = (Button)findViewById(R.id.button1);
Context context = getApplicationContext();
InputStream istream = context.getResources().openRawResource(R.id.thetext);
DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = null;
try {
docBuilder = docFactory.newDocumentBuilder();
} catch (ParserConfigurationException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
doc = docBuilder.parse(istream);
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
final Node textik = doc.getElementsByTagName("thetext").item(1);
etext.setText(textik.getTextContent());
but.setOnClickListener(new OnClickListener(){
public void onClick(View v){
String s = etext.getText().toString();
textik.setTextContent(s);
System.exit(0);
}
});
}
}
不是將它存儲在xml中,而是將字符串存儲在'SharedPreferences'中。配置起來更容易。見https://developer.android.com/training/basics/data-storage/shared-preferences.html – akash93
非常感謝你! –