这是我第一次发帖
我是新人，所以对我好！
我正在关注 travis 的教程，它用于保存数据和使用异步任务
我真的很专注，但我找不到我的代码有什么问题，所以我在这里发布！: 我加了logcat！它在没有异步和进度条的情况下工作（保存和加载）
最新更改！：我修复了进度条，但 loadwithasync 类不起作用，我的意思是这一行：我认为这必须返回 Srting ld 并在文本视图 res 中设置它。但它不是这样看的！为什么来自 mybringback 的 travis！没有写像 Strig s = new loadWith..... 这样的行吗？你能告诉我问题出在哪里吗！我很困惑，我不知道如何正确调试！新的 loadWithAsyncTask().execute(FILENAME);
public class SaveAndLoadInternal extends Activity implements OnClickListener {
EditText file, data;
TextView res;
FileInputStream fis;
FileOutputStream fos;
String FILE_NAME;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.save_load_internal);
Button load, save;
file = (EditText) findViewById(R.id.etSLIfile);
data = (EditText) findViewById(R.id.etSLIdata);
res = (TextView) findViewById(R.id.tvSLIres);
load = (Button) findViewById(R.id.bSLIload);
save = (Button) findViewById(R.id.bSLIsave);
// set file and close it!
load.setOnClickListener(this);
save.setOnClickListener(this);
}
@Override
public void onClick(View v) {
FILE_NAME = file.getText().toString();
switch (v.getId()) {
case R.id.bSLIload:
//Commented just for doing some tweaks! run
//loading process in another thread to give UI thread rest :D for avoid hanging!
FileInputStream fis = null;
String ld = "LOADING FAILED!";
/* try {
fis = openFileInput(FILE_NAME);
byte[] b = new byte[fis.available()];
while (fis.read(b) != -1) {
ld = new String(b);
}
} catch (FileNotFoundException e1) {
e1.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
res.setText(ld);
*/
new loadWithAsyncTask ().execute(FILE_NAME);
// execute will run doInBackground method!
break;
case R.id.bSLIsave:
String sd = data.getText().toString();
/*
// one way to save in file is below! must work but it isn't!
File f = new File(FILE_NAME);
try {
fos = new FileOutputStream(FILE_NAME);
fos.write(sd.getBytes());
fos.close();
res.setText("SAVING DONE!");
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
*/
try {
fos = openFileOutput(FILE_NAME, Context.MODE_PRIVATE);
fos.write(sd.getBytes());
fos.close();
res.setText("SAVING DONE!");
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
break;
default:
break;
}
}
// /*
// first param: what is being passed in (FILE_NAME)
// second param for progress bar (we use integer here)
// third one is what we will return! (the saved text! String ld)
public class loadWithAsyncTask extends AsyncTask<String, Integer, String>{
ProgressDialog pd;
String Ld = "LOADING FAILED!";
FileInputStream fis = null;
// this gonna called first
@Override
protected void onPreExecute(){
// example: setting up variables or something else!
pd = new ProgressDialog(SaveAndLoadInternal.this);
pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
pd.setMax(100);
pd.show();
}
@Override
protected String doInBackground(String... params) {
//for progress dialog
for(int i =0 ; i< 20 ; i++){
publishProgress(5);
try {
Thread.sleep(88);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
pd.dismiss();
try {
fis = openFileInput(FILE_NAME);
byte[] b = new byte[fis.available()];
res.setText(String.valueOf(fis.available()));
while (fis.read(b) != -1) {
Ld = new String(b);
}
} catch (FileNotFoundException e1) {
e1.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
fis.close();
//return the string!
return Ld;
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
// progress of loading in example!
@Override
protected void onProgressUpdate(Integer...progress){
pd.incrementProgressBy(progress[0]);
}
}// */
}