Android学习第四天--读取文件

<LinearLayout 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"
    tools:context=".MainActivity" 
    android:orientation="vertical">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="文件名"/>
    
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/filename" />
    
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="文件内容"/>
    
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:minLines="5"
        android:gravity="top"
        android:id="@+id/filecontent"
        />
    
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="确定"
        android:id="@+id/submit"/>
    
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="欢迎欢迎"
        android:id="@+id/textview" />

</LinearLayout>

页面跳转和读取文件

 

import android.app.Activity;
import android.os.Bundle;

public class Activity01 extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity01);
    }
}

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends Activity {

    EditText editText1,editText2;
    FileContent fileContent =null;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        editText1=(EditText)findViewById(R.id.filename);
        editText2=(EditText)findViewById(R.id.filecontent);
        Button button=(Button)findViewById(R.id.submit);
        button.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View v) {
                fileContent=new FileContent(MainActivity.this);
                fileContent.MyWrite(editText1.getText().toString(), editText2.getText().toString());
                
                Intent intent =new Intent(MainActivity.this,Activity01.class);
                MainActivity.this.startActivity(intent);
 
            }
        })；     
    }
}

import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;

import android.content.Context;

public class FileContent {
    Context context=null;
    
    
    
    public FileContent(Context context) {
        this.context = context;
    }



    public void MyWrite(String fileName,String fileContent)
    {
        try {
            FileOutputStream fos=context.openFileOutput(fileName,Context.MODE_PRIVATE);
            OutputStreamWriter osw=new OutputStreamWriter(fos, "utf-8");
            BufferedWriter bw=new BufferedWriter(osw);
            bw.write(fileContent);
            bw.flush();
            
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}