【发布时间】:2011-08-29 18:33:48
【问题描述】:
谁能告诉我下面的代码有什么问题? 我是java和android dev的新手,非常感谢! :)
public class GetContentThenAppend extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
TextView tv2;
tv2 = (TextView) this.findViewById(R.id.thetext);
tv2.setText("This is the writing program...\n");
try{
/*
File f = new File(Environment.getExternalStorageDirectory()+"/EngagiaDroid/videos.html");
FileInputStream fileIS = new FileInputStream(f);
BufferedReader buf = new BufferedReader(new InputStreamReader(fileIS));
String readString = new String();
//just reading each line and pass it on the debugger
int x = 1;
while((readString = buf.readLine())!= null){
tv2.append( Integer.toString(x) + ":> " );
tv2.append( readString );
tv2.append( "\n" );
x++;
}
*/
final String entryString = new String("" +
"<div stle='color: red; border: this solid red;'>" +
"Hey yo this is the new content!!!" +
"</div>" +
"</div>" +
"</div>" +
"</body>" +
"</html>");
String htmlFile = Environment.getExternalStorageDirectory()+"/EngagiaDroid/videos.html";
FileOutputStream fOut = openFileOutput(htmlFile, MODE_APPEND);
OutputStreamWriter osw = new OutputStreamWriter(fOut);
osw.write(entryString);
osw.flush();
osw.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e){
e.printStackTrace();
}
}
}
我正在尝试通过向其附加一些字符串/html 代码来更新 html 内容。我在尝试运行时收到强制关闭消息。
【问题讨论】:
-
它在做什么?你希望它做什么?
-
什么不起作用?你期待你的字符串中有新的行吗?
-
您正在经历什么?你的问题是什么?你有一个注释掉的代码块,是这个问题吗?
-
顺便说一句,在这种情况下您不需要执行“new String”(在 Java 中您很少需要这样做)。您可以连接字符串文字。
-
我更新了问题,谢谢大家的回复! :)
标签: java android string append