从android中的EditText获取文本

时间:2015-03-06 17:18:32

标签: android search android-edittext

我已编写此代码用于搜索字符串的文本文件。问题是,它表示即使存在字符串也找不到。流程是从EditText接收文本,然后开始搜索过程。但它表明每次都会找到字符串。

package com.example.demo;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import android.content.Context;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends ActionBarActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button button;
    final EditText obedittext;

    button =(Button)findViewById(R.id.button1);
    obedittext =(EditText)findViewById(R.id.editText1);


    button.setOnClickListener(
            new View.OnClickListener()
            {
                boolean textfound;
                public void onClick(View view)
                {
                    textfound = searchtext(obedittext.getText().toString());
                    if(textfound)
                        maketoast(obedittext.getText().toString());
                    else
                        maketoast("Unsuccessfull");
                }
    });

}

protected boolean searchtext(String string) {
    // TODO Auto-generated method stub

    BufferedReader br = null;
    try {

        String sCurrentLine;

        br = new BufferedReader(new InputStreamReader(getAssets().open("mneumo.txt")));

        while ((sCurrentLine = br.readLine()) != null) {
            if(sCurrentLine.equals(string)) {
                return true;
            }
        }
        br.close();


    } catch (IOException e) {
        e.printStackTrace();
    }
        finally{

        }
    return false;
}


private void maketoast(String string) {
    // TODO Auto-generated method stub

    Context context = getApplicationContext();

    Toast toast = Toast.makeText(context, string , Toast.LENGTH_SHORT);
    toast.show();
}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}
}

因此,当我尝试在代码本身内部提供字符串而不是从edittext获取字符串时,它可以正常工作。像这样, string = "SPINAL ANESTHESIA AGENTS";

示例文本文件是

SPINAL ANESTHESIA AGENTS
XYLOCAINE: WHERE NOT TO USE WITH EPINEPHRINE
GENERAL ANAESTHESIA: EQUIPMENT CHECK PRIOR TO INDUCING 

那我怎么能纠正这个问题呢?有谁能说我为什么会遇到这个问题? 我可以用任何其他方法来比较字符串吗?

文本文件正确放置在assets文件夹中。我使用资产管理器访问它。我是Android开发的新手。

1 个答案:

答案 0 :(得分:0)

可能你的editText已包含一些空格,要从editText中获取文本,请尝试以下操作:

obedittext.getText().toString().trim();

并在searchtext()方法中,将if条件替换为:

if(sCurrentLine.equalsIgnoreCase(string))