Android读取txt文本文档

Android读取txt文本文档
一个可以读取txt文本文档的安卓demo
txt文档放在资源文件res/raw目录下，文档名称为a.txt
安卓项目的组织结构如图所示：
layout布局文件
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="/apk/res/android" android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Button
android:id="@+id/button1"
android:layout_width="fill_parent"
android:layout_height="147dp"
android:text="Button" />
<ScrollView
android:id="@+id/scrollView1"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<TextView
android:id="@+id/textView1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium" /> </LinearLayout>
</ScrollView>
</LinearLayout>
strings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="hello">Hello World, _TxtReaderDemoActivity!</string>
<string name="app_name">_TxtReaderDemo</string>
</resources>
Java文件（Class文件）
TxtReader.java
package com.android.txt;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
public class TxtReader {
/**
* 通过一个InputStream获取内容
*
* @param inputStream
* @return
*/
public static String getString(InputStream inputStream) {
InputStreamReader inputStreamReader = null;
try {
inputStreamReader = new InputStreamReader(inputStream, "gbk");
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
}
BufferedReader reader = new BufferedReader(inputStreamReader);
StringBuffer sb = new StringBuffer("");
String line;
try {
while ((line = reader.readLine()) != null) {
sb.append(line);
sb.append("\n");
}
} catch (IOException e) {
e.printStackTrace();
}
return sb.toString();
}
/**
* 通过txt文件的路径获取其内容
*
* @param filepath
* @return
*/
public static String getString(String filepath) {
File file = new File(filepath);
FileInputStream fileInputStream = null;
try {
fileInputStream = new FileInputStream(file);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
return getString(fileInputStream);
}
}
TxtReaderDemoActivity.java
package com.android.txt;
import java.io.InputStream;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class TxtReaderDemoActivity extends Activity {
Button button;
TextView textView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(yout.main);
button = (Button) findViewById(R.id.button1);
textView = (TextView) findViewById(R.id.textView1);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
InputStream inputStream = getResources().openRawResource(R.raw.a);
String string = TxtReader.getString(inputStream);
textView.setText(string);
}
});
}
}
运行效果：。