Android Open Source - android-charmap Charmap Activity

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From Project

Back to project page android-charmap.

License

The source code is released under:

MIT License

Java Source Code

package com.kkinder.charmap;
// w  w w.  j a v a  2  s  . c o  m
import java.util.ArrayList;

import android.annotation.TargetApi;
import android.app.Activity;
import android.app.Dialog;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Build;
import android.os.Bundle;
import android.text.Html;
import android.text.method.LinkMovementMethod;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.GridView;
import android.widget.LinearLayout;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

public class CharmapActivity extends Activity {
  
  /**
   * Adapter of the GridView to show the char buttons.
   */
  private class ButtonMapAdapter extends BaseAdapter {

    /** Inclusive begin and exclusive end of the character codes to be shown. */
    private int begin, end;
      
    /**
     * 
     * @param begin inclusive beginning of the charcode to be shown
     * @param end exclusive end of the charcode to be shown
     */
      public ButtonMapAdapter(int begin, int end) {
          this.begin = begin;
          this.end = end;
      }

      @Override
      public int getCount() {
          return end >= begin ? end - begin : 0;
      }

      @Override
      public Character getItem(int position) {
          return (char) (begin + position);
      }

      @Override
      public long getItemId(int position) {
          return position;
      }

      @Override
      public View getView(int position, View convertView, ViewGroup parent) {
        if (convertView == null) {
              convertView = new Button(CharmapActivity.this);
          }
        Button button = (Button) convertView;;
        
        button.setText(String.valueOf(getItem(position)));
        
        button.setOnClickListener(new OnClickListener() {
          @Override
            public void onClick(View v) {
            CharSequence c = ((TextView) v).getText();
            if (editArea.getVisibility() == View.VISIBLE) {
                editor.append(c);
            } else {
                finish(c.toString());
            }
            }
        });
          return convertView;
      }
  }

  // End of inner classes
  
  private static final int DIALOG_ABOUT = 1;

  private Boolean batchMode;
  private int pageIndex;
  
  private Spinner sectionSpinner;
  private AutoCompleteTextView sectionSearchText;
  private View copyButton;
  private EditText editor;
  private GridView gridview;
  private LinearLayout editArea;
  private View searchToggleButton;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    // Restore preferences

    SharedPreferences settings = getPreferences(MODE_PRIVATE);
    batchMode = settings.getBoolean("batchMode", false);
    pageIndex = settings.getInt("page", 0);

    // Do the GUI stuff

    sectionSpinner = (Spinner) findViewById(R.id.sectionSpinner);
    sectionSearchText = (AutoCompleteTextView) findViewById(R.id.sectionSearchText);
    copyButton = findViewById(R.id.copyButton);
    editor = (EditText) findViewById(R.id.editor);
    gridview = (GridView) findViewById(R.id.gridView);
    editArea = (LinearLayout) findViewById(R.id.editArea);
    searchToggleButton = findViewById(R.id.searchToggleButton);
    
    // Edit area

    updateBatchMode(batchMode);

    copyButton.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        finish(editor.getText().toString());
      }
    });
    
    // Section/page choice spinner

    ArrayAdapter<CharSequence> adapter = new ArrayAdapter<CharSequence>(
        this, android.R.layout.simple_spinner_item, CharMap.charmapNames);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    sectionSpinner.setAdapter(adapter);
    sectionSpinner.setSelection(pageIndex);
    sectionSpinner.setOnItemSelectedListener(new OnItemSelectedListener() {
      public void onItemSelected(AdapterView<?> a, View v, int position, long id) {
        onSectionChoiceSelected(position);
      }
      public void onNothingSelected(AdapterView<?> a) {
      }
    });
    
    // Section/page search

    ArrayList<IndexEntry> charmapNameEntries = new ArrayList<IndexEntry>(CharMap.charmapNames.length);
    for (int i = 0; i < CharMap.charmapNames.length; ++i)
      charmapNameEntries.add(new IndexEntry(i, CharMap.charmapNames[i]));
    ArrayAdapter<IndexEntry> searchAdapter = new ArrayAdapter<IndexEntry>(
        this, android.R.layout.simple_dropdown_item_1line, charmapNameEntries);
    sectionSearchText.setAdapter(searchAdapter);
    sectionSearchText.setVisibility(View.GONE);
    sectionSearchText.setOnItemClickListener(new OnItemClickListener() {
      public void onItemClick(AdapterView<?> a, View view, int pos, long id) {
        sectionSpinner.setSelection(((IndexEntry) a.getItemAtPosition(pos)).index);
        setSectionSearchVisible(false);
      }
    });
    
    searchToggleButton.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        toggleSectionSearch();
        sectionSearchText.requestFocus();
      }
    });
  }
  
  /**
   * Toggle visibility of the search box for section.
   */
  private void toggleSectionSearch() {
    setSectionSearchVisible(sectionSearchText.getVisibility() != View.VISIBLE);
  }
  
  private void setSectionSearchVisible(boolean visible) {
    if (visible) {
      Animation anim = AnimationUtils.loadAnimation(this, R.anim.slide_in_up);
      sectionSearchText.setText(null);
      sectionSearchText.setVisibility(View.VISIBLE);
      sectionSearchText.startAnimation(anim);
      sectionSpinner.setVisibility(View.GONE);
    } else {
      Animation anim = AnimationUtils.loadAnimation(this, R.anim.slide_out_down);
      sectionSearchText.setVisibility(View.GONE);
      sectionSearchText.startAnimation(anim);
      sectionSpinner.setVisibility(View.VISIBLE);
    }
  }

  @Override
  protected void onStop() {
    super.onStop();

    savePreferences();
  }

  public void savePreferences() {
    SharedPreferences settings = getPreferences(MODE_PRIVATE);
    SharedPreferences.Editor editor = settings.edit();
    editor.putBoolean("batchMode", batchMode);
    editor.putInt("page", pageIndex);
    editor.commit();
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    super.onCreateOptionsMenu(menu);
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.mainmenu, menu);
    return true;
  }

  @Override
  public boolean onPrepareOptionsMenu(Menu menu) {
    if (batchMode) {
      menu.findItem(R.id.menu_show_editor).setVisible(false);
      menu.findItem(R.id.menu_hide_editor).setVisible(true);
    } else {
      menu.findItem(R.id.menu_show_editor).setVisible(true);
      menu.findItem(R.id.menu_hide_editor).setVisible(false);
    }
    return super.onPrepareOptionsMenu(menu);
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case R.id.menu_about:
      showDialogCompat(DIALOG_ABOUT);
      return true;
    case R.id.menu_show_editor:
      batchMode = true;
      updateBatchMode(true);
      return true;
    case R.id.menu_hide_editor:
      batchMode = false;
      updateBatchMode(false);
      return true;
    default:
      return super.onOptionsItemSelected(item);
    }
  }

  @TargetApi(Build.VERSION_CODES.HONEYCOMB)
  public void invalidateOptionsMenuCompat() {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB)
      super.invalidateOptionsMenu();
  }

  public void updateBatchMode(boolean batchMode) {
    if (batchMode) {
      editArea.setVisibility(View.VISIBLE);
      editArea.startAnimation(AnimationUtils.loadAnimation(this, R.anim.slide_in_up));
    } else {
      editArea.setVisibility(View.GONE);
      editArea.startAnimation(AnimationUtils.loadAnimation(this, R.anim.slide_out_down));
    }
    
    invalidateOptionsMenuCompat();
  }

  private void onSectionChoiceSelected(int index) {
    pageIndex = index;

    int begin = CharMap.charmaps[index][0];
    int end = CharMap.charmaps[index][1] + 1;
    gridview.setAdapter(new ButtonMapAdapter(begin, end));
  }

  /**
   * Finish the activity and copy the char(s) to the clipboard.
   * @param text
   */
  @SuppressWarnings("deprecation")
  private void finish(String text) {
    ((android.text.ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE)).
    setText(text);

    Toast.makeText(this, "\"" + editor.getText() + "\" copied to clipboard.",
        Toast.LENGTH_SHORT).show();
    finish();
  }
  
  @SuppressWarnings("deprecation")
  public void showDialogCompat(int id) {
    /* Use method deprecation instead of class deprecation */
    super.showDialog(id);
  }
  
  @Override
  @Deprecated
  protected Dialog onCreateDialog(int id) {
    if (id == DIALOG_ABOUT) {
      
      final Dialog dialog = new Dialog(CharmapActivity.this);
      dialog.setContentView(R.layout.about);
      dialog.setTitle(R.string.about_title);
      dialog.setCancelable(true);
      
      TextView aboutText = (TextView) dialog.findViewById(R.id.AboutTextView);
      Button closeButton = (Button) dialog.findViewById(R.id.CloseButton);
      
      aboutText.setText(Html.fromHtml(getString(R.string.about)));
      aboutText.setMovementMethod(LinkMovementMethod.getInstance());
  
      closeButton.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
          try {
            dismissDialog(DIALOG_ABOUT);
          } catch (RuntimeException e) {
            Log.e(CharmapActivity.class.getSimpleName(), e.toString());
          }
        }
      });
  
      return dialog;
      
    } else {
      return super.onCreateDialog(id);
    }
  }
}

Java Source Code List

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