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這是我的代碼:如何編寫java代碼逐個顯示textview,例如點擊提交按鈕顯示文本視圖並存儲而下一次點擊相同的按鈕顯示下一個文本視圖和存儲data.how寫這種類型的Java代碼,我有一個主要的.xml文件如何寫代碼逐個閱讀TextView,如何存儲sd卡
public class XMLRWActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button submit_btn = (Button) findViewById (R.id.submit_btn);
final EditText textbox = (EditText) findViewById (R.id.first_text);
final TextView newtext = (TextView) findViewById (R.id.read_text);
submit_btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
byte[] readinfo = new byte[160];
String FILENAME = "first_file";
FileOutputStream mystream;
try {
mystream = openFileOutput (FILENAME, Context.MODE_PRIVATE);
String variabletowrite = textbox.getText().toString();
mystream.write(variabletowrite.getBytes());
mystream.close();
FileInputStream readstream = openFileInput (FILENAME);
readstream.read(readinfo);
newtext.setText(new String(readinfo));
readstream.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
}
這是一個main.xml中的文件
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:weightSum="1">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<EditText android:id="@+id/first_text"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<requestFocus></requestFocus>
</EditText>
<Button android:layout_height="wrap_content"
android:text="Submit"
android:id="@+id/submit_btn"
android:layout_width="match_parent" />
<TextView
android:id="@+id/read_text1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="TextView1"
android:textAppearance="?android:attr/textAppearanceLarge" ></TextView>
<TextView
android:id="@+id/read_text2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="TextView2"
android:textAppearance="?android:attr/textAppearanceLarge" ></TextView>
<TextView
android:id="@+id/read_text3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="TextView3"
android:textAppearance="?android:attr/textAppearanceLarge" >
</TextView>
</LinearLayout>
這是清單文件中的存儲權限
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" > </uses-permission>
歡迎的Android愛好者堆棧交流。 Android Stack Exchange適用於愛好者,高級用戶和使用Android操作系統的普通用戶。關於Android開發/編程的問題在這裏是無關緊要的,請在Stack Overflow上提出這些問題。 – 2012-02-28 06:40:53
好的,謝謝你,先生 – Satya 2012-02-28 06:46:54