Android Open Source - TextFileXpanderAndroid Text View Activity

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License

The source code is released under:
Apache License
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Java Source Code

//
//  TextViewActivity.java
//  TextFileXpander
////from w w  w.j av  a 2 s.co  m
//  Created by wanswings on 2014/10/15.
//  Copyright (c) 2014 wanswings. All rights reserved.
//
package com.wanswings.TextFileXpander;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import android.app.ActionBar;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.text.Spannable;
import android.text.SpannableStringBuilder;
import android.text.style.BackgroundColorSpan;
import android.text.style.ForegroundColorSpan;
import android.text.style.RelativeSizeSpan;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

public class TextViewActivity extends Activity {

  private static final String DEFAULT_FONTSIZE = "1.0";
  private static final String[] FONT_SIZES = {"0.6", "0.8", "1.0", "1.2", "1.4", "1.6", "1.8", "2.0", "2.2", "2.4"};

  private String fontSize;
  private int selectedFontSizeIdx;
  private String ynHideMarker;
  private String packageName;
  private String classNameForLog;
  private PrivateSharedPrefs prefs;
  private String localFileName;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    packageName = this.getPackageName();
    classNameForLog = this.getClass().getName() + "...";
    prefs = new PrivateSharedPrefs(this, PrivateSharedPrefs.SAVE_PREFS_NAME_TEXTVIEW);
    Log.i(packageName, classNameForLog + "onCreate start");

    loadKeys();

    setContentView(R.layout.activity_text_view);

    ActionBar actionBar = getActionBar();
    actionBar.setDisplayHomeAsUpEnabled(true);

    Intent intent = getIntent();
    boolean fromMain = intent.getBooleanExtra(MainActivity.EXTRA_FROM_MAIN, false);
    if (fromMain) {
      localFileName = intent.getStringExtra(MainActivity.EXTRA_PARAM_MAIN);
      setTitle(localFileName);
      Log.i(packageName, classNameForLog + "EXTRA_PARAM_MAIN..." + localFileName);
      viewTextData();
    }
  }

  @Override
  protected void onResume() {
    super.onResume();
    Log.i(packageName, classNameForLog + "onResume start");
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.text_view, menu);
    return super.onCreateOptionsMenu(menu);
  }

  @Override
  public boolean onPrepareOptionsMenu(Menu menu) {
    super.onPrepareOptionsMenu(menu);

    MenuItem item = (MenuItem)menu.findItem(R.id.action_hide_marker);
    if (ynHideMarker.equals(getString(android.R.string.yes))) {
      item.setTitle(R.string.action_show_marker);
    }
    else {
      item.setTitle(R.string.action_hide_marker);
    }
    return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    Log.i(packageName, classNameForLog + "onOptionsItemSelected start");

    int id = item.getItemId();
    if (id == android.R.id.home) {
      finish();
      return true;
    }
    else if (id == R.id.action_font_size) {
      selectFontSize();
      return true;
    }
    else if (id == R.id.action_hide_marker) {
      if (ynHideMarker.equals(getString(android.R.string.yes))) {
        ynHideMarker = getString(android.R.string.no);
      }
      else {
        ynHideMarker = getString(android.R.string.yes);
      }
      saveKeys(null, ynHideMarker);
      viewTextData();
      return true;
    }
    return super.onOptionsItemSelected(item);
  }

  private void loadKeys() {
    String[] keys = prefs.getKeys(PrivateSharedPrefs.SAVE_KEYS_TEXTVIEW);
    if (keys != null) {
      fontSize = keys[0];
      ynHideMarker = keys[1];
    }
    else {
      fontSize = DEFAULT_FONTSIZE;
      ynHideMarker = getString(android.R.string.no);
      saveKeys(fontSize, ynHideMarker);
    }
  }

  private void saveKeys(String fSize, String hideMarker) {
    prefs.storeKeys(PrivateSharedPrefs.SAVE_KEYS_TEXTVIEW, new String[]{fSize, hideMarker});
  }

  private void selectFontSize() {
    selectedFontSizeIdx = -1;
    int selected = -1;
    for (int i = 0; i < FONT_SIZES.length; i++) {
      if (fontSize.equals(FONT_SIZES[i])) {
        selectedFontSizeIdx = selected = i;
        break;
      }
    }
    new AlertDialog.Builder(this)
    .setTitle(R.string.dialog_title_font_size)
    .setSingleChoiceItems(FONT_SIZES, selected, new DialogInterface.OnClickListener() {
      public void onClick(DialogInterface dialog, int idx) {
        selectedFontSizeIdx = idx;
      }
    })
    .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
      public void onClick(DialogInterface dialog, int id) {
        if (selectedFontSizeIdx >= 0) {
          fontSize = FONT_SIZES[selectedFontSizeIdx];
          saveKeys(fontSize, null);
          viewTextData();
        }
      }
    })
    .setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
      public void onClick(DialogInterface dialog, int id) {
      }
    })
    .show();
  }

  private void viewTextData() {
    Pattern pattern = Pattern.compile("^marker:(strong:|weak:)?\\s*(.+)");

    TextView view = (TextView)findViewById(R.id.textView);
    view.setText("");

    InputStream is = null;
    BufferedReader br = null;
    String line = null;
    try {
      is = openFileInput(localFileName);
      br = new BufferedReader(new InputStreamReader(is, "UTF-8"));
      while ((line = br.readLine()) != null) {
        if (line.length() == 0) {          
          view.append("\n");
        }
        else {
          SpannableStringBuilder ssb = null;
          Matcher match = pattern.matcher(line);
          if (match.find()) {
            String matchCmd = match.group(1);
            String matchStr = match.group(2);
            int fg;
            if (matchCmd == null) {
              fg = Color.BLUE;
            }
            else if (matchCmd.equals("strong:")) {
              fg = Color.RED;
            }
            else if (matchCmd.equals("weak:")) {
              fg = Color.LTGRAY;
            }
            else {
              fg = Color.BLUE;
            }
            ssb = new SpannableStringBuilder(matchStr);
            int len = ssb.length();
            if (ynHideMarker.equals(getString(android.R.string.yes))) {
              BackgroundColorSpan bg = new BackgroundColorSpan(Color.BLACK);                
              ssb.setSpan(bg, 0, len, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE );
              fg = Color.BLACK;
            }
            ssb.setSpan(new ForegroundColorSpan(fg), 0, len, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE );
          }
          if (ssb == null) {
            ssb = new SpannableStringBuilder(line);
          }
          if (!fontSize.equals(DEFAULT_FONTSIZE)) {
            RelativeSizeSpan fs = new RelativeSizeSpan(Float.parseFloat(fontSize));
            ssb.setSpan(fs, 0, ssb.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE );                
          }
          view.append(ssb);
          view.append("\n");
        }
      }
    }
    catch (IOException e) {
      Log.e(packageName, classNameForLog + e.toString());
    }
    finally {
      try {
        if (br != null) br.close();
        if (is != null) is.close();
      }
      catch (IOException e) {
        Log.e(packageName, classNameForLog + e.toString());
      }
    }
  }

}
Java Source Code List
