Android example source code file (ShortcutEditorDialog.java)

This example Android source code file (ShortcutEditorDialog.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

alertdialog, android, bitmap, bundle, content, edittext, imageview, intent, oncancellistener, onclicklistener, os, override, shortcuteditordialog, shortcuticonresource, state_intent, string, text, textwatcher, ui, widget

The ShortcutEditorDialog.java Android example source code

/*
 * Copyright (C) 2008 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.anycut;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent.ShortcutIconResource;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;

/**
 * A dialog that can edit a shortcut intent. For now the icon is displayed, and only
 * the name may be edited.
 */
public class ShortcutEditorDialog extends AlertDialog implements OnClickListener, TextWatcher {
    static final String STATE_INTENT = "intent";

    private boolean mCreated = false;

    private Intent mIntent;
    private ImageView mIconView;
    private EditText mNameView;
    private OnClickListener mOnClick;
    private OnCancelListener mOnCancel;

    public ShortcutEditorDialog(Context context, OnClickListener onClick,
            OnCancelListener onCancel) {
        super(context);

        mOnClick = onClick;
        mOnCancel = onCancel;

        // Setup the dialog
        View view = getLayoutInflater().inflate(R.layout.shortcut_editor, null, false);
        setTitle(R.string.shortcutEditorTitle);
        setButton(context.getText(android.R.string.ok), this);
        setButton2(context.getText(android.R.string.cancel), mOnClick);
        setOnCancelListener(mOnCancel);
        setCancelable(true);
        setView(view);

        mIconView = (ImageView) view.findViewById(R.id.shortcutIcon);
        mNameView = (EditText) view.findViewById(R.id.shortcutName);
    }

    public void onClick(DialogInterface dialog, int which) {
        if (which == BUTTON1) {
            String name = mNameView.getText().toString();
            if (TextUtils.isEmpty(name)) {
                // Don't allow an empty name
                mNameView.setError(getContext().getText(R.string.errorEmptyName));
                return;
            }
            mIntent.putExtra(Intent.EXTRA_SHORTCUT_NAME, name);
        }
        mOnClick.onClick(dialog, which);
    }

    @Override
    protected void onCreate(Bundle state) {
        super.onCreate(state);
        if (state != null) {
            mIntent = state.getParcelable(STATE_INTENT);
        }

        mCreated = true;

        // If an intent is set make sure to load it now that it's safe
        if (mIntent != null) {
            loadIntent(mIntent);
        }
    }

    @Override
    public Bundle onSaveInstanceState() {
        Bundle state = super.onSaveInstanceState();
        state.putParcelable(STATE_INTENT, getIntent());
        return state;
    }

    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
        // Do nothing
    }

    public void onTextChanged(CharSequence s, int start, int before, int count) {
        // Do nothing
    }

    public void afterTextChanged(Editable text) {
        if (text.length() == 0) {
            mNameView.setError(getContext().getText(R.string.errorEmptyName));
        } else {
            mNameView.setError(null);
        }
    }

    /**
     * Saves the current state of the editor into the intent and returns it.
     *
     * @return the intent for the shortcut being edited
     */
    public Intent getIntent() {
        mIntent.putExtra(Intent.EXTRA_SHORTCUT_NAME, mNameView.getText().toString());
        return mIntent;
    }

    /**
     * Reads the state of the shortcut from the intent and sets up the editor
     *
     * @param intent A shortcut intent to edit
     */
    public void setIntent(Intent intent) {
        mIntent = intent;
        if (mCreated) {
            loadIntent(intent);
        }
    }

    /**
     * Loads the editor state from a shortcut intent.
     *
     * @param intent The shortcut intent to load the editor from
     */
    private void loadIntent(Intent intent) {
        // Show the icon
        Bitmap iconBitmap = intent.getParcelableExtra(Intent.EXTRA_SHORTCUT_ICON);
        if (iconBitmap != null) {
            mIconView.setImageBitmap(iconBitmap);
        } else {
            ShortcutIconResource iconRes = intent.getParcelableExtra(
                    Intent.EXTRA_SHORTCUT_ICON_RESOURCE);
            if (iconRes != null) {
                int res = getContext().getResources().getIdentifier(iconRes.resourceName, null,
                        iconRes.packageName);
                mIconView.setImageResource(res);
            } else {
                mIconView.setVisibility(View.INVISIBLE);
            }
        }

        // Fill in the name field for editing
        mNameView.addTextChangedListener(this);
        mNameView.setText(intent.getStringExtra(Intent.EXTRA_SHORTCUT_NAME));

        // Ensure the intent has the proper flags
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    }
}