想了一下就土炮出第一版，是直接將內容讀取完畢，不過等待跑完約莫30秒了Ｏｒｚ
所以將其改為初始讀取20行，使用者滑動卷軸時會讀取5行，這樣的方式讀取的時間會比較久，不過這樣較為符合朋友的需求吧XDDDD
不然30秒後才看得到小說也太悲劇XD
不過App有錯請見諒，與周公有約XD
XML：
<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.cyfang.textreader.MainActivity" >
<ScrollView
android:id="@+id/scrollView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:singleLine="false" />
</LinearLayout>
</ScrollView>
</RelativeLayout>
Manifest：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.cyfang.textreader"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="14" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" android:largeHeap="true">
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Code：
package com.cyfang.textreader;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.ViewTreeObserver.OnScrollChangedListener;
import android.widget.ScrollView;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
/** 卷軸 */
private ScrollView scrollView;
/** 小說 */
private TextView textView;
/** 小說清單 */
private String[] files;
/** 小說預設路徑 */
private final String PATH = Environment.getExternalStorageDirectory().getAbsolutePath() + "/小說/";
/** 資料夾 */
private File file = new File(PATH);
/** 讀取路徑 */
private String currentReadPath = "";
/** 文字大小 */
private static int fontSize = 16;
/** 讀取長度 */
private static int readLength = 20;
/** 讀取小說 */
private static BufferedReader reader;
/** 第一次執行 */
private static Boolean isFirst = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 建立小說資料夾
file.mkdirs();
textView = (TextView) findViewById(R.id.textView);
// 設定文字大小
textView.setTextSize(fontSize);
scrollView = (ScrollView) findViewById(R.id.scrollView1);
// 卷軸在捲動時再繼續讀取資料近來
scrollView.getViewTreeObserver().addOnScrollChangedListener(new OnScrollChangedListener() {
@Override
public void onScrollChanged() {
try {
if (isFirst)
readContent();
} catch (NullPointerException e) {
isFirst = false;
readLength = 20;
Toast.makeText(MainActivity.this, "已經讀取完畢了喔", 1).show();
} catch (IOException e) {
Toast.makeText(MainActivity.this, "讀取錯誤", 1).show();
}
}
});
// 沒有選取小說則讓跳出選擇視窗
if (currentReadPath.equals(""))
showChoiceFile();
}
/** 讀取小說 */
private void readContent() throws NullPointerException, IOException {
if (reader == null)
throw new NullPointerException();
String str = reader.readLine();
for (int index = 0; index < readLength; index++) {
if (str == null) {
reader.close();
break;
} else {
textView.append(str + "\n");
str = reader.readLine();
}
}
if (!isFirst) {
readLength /= 4;
isFirst = true;
}
}
private void showChoiceFile() {
File[] files = file.listFiles();
if (files == null) {
Toast.makeText(MainActivity.this, "你的檔案沒有任何檔案喔!", 1).show();
return;
}
if (this.files == null) {
this.files = new String[files.length];
for (int index = 0; index < files.length; index++) {
this.files[index] = files[index].getAbsolutePath();
}
}
new AlertDialog.Builder(MainActivity.this).setNegativeButton("閱讀", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
try {
reader = new BufferedReader(new InputStreamReader(new FileInputStream(currentReadPath), "UTF-8"));
readContent();
} catch (UnsupportedEncodingException e) {
Toast.makeText(MainActivity.this, "編碼並非為UTF8", 1).show();
} catch (FileNotFoundException e) {
Toast.makeText(MainActivity.this, "找不到該檔案", 1).show();
} catch (IOException e) {
Toast.makeText(MainActivity.this, "讀取錯誤", 1).show();
}
}
}).setSingleChoiceItems(this.files, 0, new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
currentReadPath = MainActivity.this.files[which];
}
}).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) {
showChoiceFile();
return true;
} else if (id == R.id.action_Add) {
fontSize += 2;
textView.setTextSize(fontSize);
return true;
} else if (id == R.id.action_Sub) {
fontSize -= 2;
textView.setTextSize(fontSize);
return true;
}
return super.onOptionsItemSelected(item);
}
}
執行結果：
