本文实例讲述了Android开发实现Files文件读取解析功能。分享给大家供大家参考,具体如下:
package com.example.file;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
public class MainActivity extends AppCompatActivity {
EditText edt;
Button btn;
TextView tv;
@Override protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
edt = (EditText) findViewById(R.id.editText);
btn = (Button) findViewById(R.id.button);
tv = (TextView) findViewById(R.id.textView);
btn.setOnClickListener(new View.OnClickListener() {
@Override public void onClick(View view) {
WriteFiles(edt.getText().toString());
tv.setText(readFiles());
}
}
);
}
//保存文件内容 public void WriteFiles(String content){
try {
FileOutputStream fos = openFileOutput("a.txt",MODE_PRIVATE);
fos.write(content.getBytes());
fos.close();
}
catch (FileNotFoundException e) {
e.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
}
}
//读取文件 public String readFiles(){
String content = null;
try {
FileInputStream fis = openFileInput("a.txt");
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[]buffer = new byte[1024];
int len = 0;
while ((len = fis.read(buffer))!=-1) {
baos.write(buffer,0,len);
}
content = baos.toString();
fis.close();
;
baos.close();
}
catch (FileNotFoundException e) {
e.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
}
return content;
}
}
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.example.file.MainActivity"> <EditText android:layout_width="wrap_content" android:layout_height="200dp" android:id="@+id/editText" android:layout_alignParentTop="true" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" android:layout_alignParentRight="true" android:layout_alignParentEnd="true" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="New Button" android:id="@+id/button" android:layout_below="@+id/editText" android:layout_centerHorizontal="true" android:layout_marginTop="90dp" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="New Text" android:id="@+id/textView" android:layout_below="@+id/button" android:layout_alignParentRight="true" android:layout_alignParentEnd="true" android:layout_alignParentBottom="true" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" /></RelativeLayout>
更多关于Android相关内容感兴趣的读者可查看本站专题:《Android文件操作技巧汇总》、《Android视图View技巧总结》、《Android编程之activity操作技巧总结》、《Android布局layout技巧总结》、《Android开发入门与进阶教程》、《Android资源操作技巧汇总》及《Android控件用法总结》
希望本文所述对大家Android程序设计有所帮助。