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hzuapps#5 第五次实验
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@WLIYUN
WLIYUN committed May 16, 2018
1 parent faec7e6 commit e653c92
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146 changes: 145 additions & 1 deletion soft1614080902428/java/chakan.java
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@@ -1,14 +1,158 @@
package com.hzu.edu.myapplication;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.Button;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.app.Activity;

import android.content.Intent;

import android.os.Environment;

import android.util.Log;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

import android.widget.Toast;



import java.io.BufferedInputStream;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.FileReader;

import java.io.IOException;

public class chakan extends AppCompatActivity {

public static final String DIRECTORY = "demo";
public static final String FILENAME = "file_demo.txt";
public static final String TAG = chakan.class.getSimpleName();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chakan);
final Activity thisActivity = this;
((Button) findViewById(R.id.Button5)).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String text = ((EditText) findViewById(R.id.edit_text)).getText().toString();
saveTextIntoInternalStorage(text);
}
});

}
// 将文字保存到内部存储
private void saveTextIntoInternalStorage(String text) {
// 获取内部存储目录
File dir = this.getFilesDir();
//File dir = getCacheDir();
if (dir.isDirectory()) {
// dir.mkdir();
// dir.mkdirs();
}
if (dir.isFile()) {
// D:/Abc.txt , -> D:/Abc1.txt ->D:/abc.txt
}
File file = new File(dir, FILENAME);
// try {
// File = File.createTempFile(FILENAME, null, dir);
// } catch (IOException e) {
// e.printStackTrace();
// }
if (file.exists()) { // 判断文件是否存在
Log.i(TAG, file.getAbsolutePath());
Log.i(TAG, file.length() + ""); // bytes*1024=kb *1024 MB
Log.i(TAG, file.isFile() + "");
file.canRead();
file.canWrite();
file.canExecute();
file.getFreeSpace();
file.getTotalSpace();
}
FileOutputStream fos = null; // 字节流 | char | cn : gbk 2 bytes, utf8 3 bytes
try { // 使用API打开输出流
fos = openFileOutput(FILENAME, MODE_PRIVATE);
//FileOutputStream fos = new FileOutputStream(file);
fos.write(text.getBytes()); // 写入内容
fos.close(); // 关闭流
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
FileReader reader = null; // char
try {
reader = new FileReader(file.getAbsoluteFile());
BufferedReader bReader = new BufferedReader(reader);
String line = bReader.readLine();
Log.i(TAG, "从文件读取的内容: " + line);
bReader.close();
reader.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
// 显示结果
showResult(file.getAbsolutePath());
// 删除文件
// file.delete();
// deleteFile(FILENAME);
}
private void showResult(String result) {
((TextView) findViewById(R.id.view1))
.setText(result.toCharArray(), 0, result.length());
}

}
}
84 changes: 77 additions & 7 deletions soft1614080902428/res/layout/activity_chakan.xml
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<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".chakan"
android:background="@drawable/c">
android:background="@drawable/c"
tools:context=".chakan">

<TextView
android:layout_width="384dp"
android:layout_height="50dp"
android:layout_height="40dp"
android:gravity="center"
android:text="事件查看"
android:textColor="#3232CD"
android:textSize="30dp"
/>
android:textSize="20dp"
android:textStyle="bold"/>
<EditText
android:id="@+id/edit_text"
android:layout_width="match_parent"
android:layout_height="60dp" />

</android.support.constraint.ConstraintLayout>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="搜索"
android:textSize="20dp"
android:textColor="#000000"
android:textStyle="bold"/>

<Button
android:id="@+id/Button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="1" />

<Button
android:id="@+id/Button2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="星期三去……" />

<Button
android:id="@+id/Button3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="等一下得去……" />


<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text=" " />

<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text=" " />

<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text=" " />

<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text=" " />

<Button
android:id="@+id/Button5"
android:layout_width="match_parent"
android:layout_height="38dp"
android:text="打开"
android:textStyle="bold"/>

<TextView
android:id="@+id/view1"
android:layout_width="match_parent"
android:layout_height="33dp"
android:gravity="center" />

</LinearLayout>

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