Question

所以我需要帮助，我不知道什么是我没有任何错误。只是不工作所以我得到了一个EditText（TextInput）你在那里写的东西例如“马铃薯”，当你按下Button（save和addButton）应该在TextInput中取什么并将它放入SD卡然后ListView（TextOutput）应该读取从该文件夹中显示它所说的内容。希望你们明白

我正在使用的代码（已更新）

public File file = new File(Environment.getExternalStorageDirectory() + "/accelerometer.html");

public void onCreate1(Bundle savedInstanceState) {

    ListView lv = (ListView)findViewById(R.id.textOutput);
    final ArrayAdapter<String> arrAdap = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1);
    lv.setAdapter(arrAdap);

    findViewById(R.id.save).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            save();
            try {
                arrAdap.addAll(load());
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            arrAdap.notifyDataSetChanged();
        }
    });

}

public void save() {
    String textInput = mTextInput.getText().toString().trim();
    if(textInput.equals("")) {
        return;
    }
}

@SuppressWarnings("unchecked")
public ArrayList<String> load() throws IOException{
    FileInputStream fis = null;
    ObjectInputStream ois = null;
    ArrayList<String> returnlist = null;
    try {
        fis = new FileInputStream(file);
        ois = new ObjectInputStream(fis);
        returnlist = (ArrayList<String>) ois.readObject();
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if(fis != null)
            fis.close();
        if(ois != null)
            ois.close();
    }

    return returnlist;
    }

@Override
public void onClick(View arg0) {
    // TODO Auto-generated method stub

}
}

提前感谢所有帮助：）

Answer 1

在bufferWritter.flush();

之后添加bufferWritter.write(TextImput);

编辑：
试试这段代码：

private File file = new File(Environment.getExternalStorageDirectory() + "/accelerometer.html");

@Override
public void onCreate(Bundle savedInstanceState) {

    ListView lv = (ListView)findViewById(R.id.textOutput);
    final ArrayAdapter<String> arrAdap = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1);
    lv.setAdapter(arrAdap);

    findViewById(R.id.save).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            save();
            arrAdap.add(load());
            arrAdap.notifyDataSetChanged();
        }
    });

}

public void save() {
    String textInput = mTextInput.getText().toString().trim();
    if(textInput.equals("")
        return;

    AddButton.setOnClickListener(new OnClickListener() {    //i don't know what this should do
        @Override                                           //you set the same text to the same textview 
        public void onClick(View arg0) {                    //-> does nothing
            mTextInput.setText(mTextInput.getText());

        }
    });

    ArrayList<String> input = new ArrayList<>();
    input.add(textInput);

    FileOutputStream fos;
    ObjectOutputStream oos;

    try {
        fos = new FileOutputStream(file);
        oos = new ObjectOutputStream(fos);
        oos.writeObject(input);
        oos.flush();
    } catch (IOException ex) {
        ex.printStackTrace();
    } finally {
        if(fos != null)
            fos.close();
        if(oos != null)
            oos.close();
    }
}

public ArrayAdapter<String> load(){
    FileInputStream fis;
    ObjectInputStream ois;
    ArrayList<String> returnlist;
    try {
        fis = new FileInputStream(file);
        ois = new ObjectInputStream(fis);
        returnlist = (ArrayList<String>) ois.readObject();
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if(fis != null)
            fis.close();
        if(ois != null)
            ois.close();
    }

    return returnlist;
}

它只是编码出我的想法。没有经过测试。

也许你必须在finally语句中处理一些IOExceptions，但只是在它周围添加另一个try {...} catch（）{...}。

我还添加了评论。

EditText到ListView通过SD卡读取

1 个答案: