applicationinfo.java

android 例子中的Home。很有代表意义

/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * 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.android.home;

import android.content.ComponentName;
import android.content.Intent;
import android.graphics.drawable.Drawable;

/**
 * Represents a launchable application. An application is made of a name (or title), an intent
 * and an icon.
 */
class ApplicationInfo {
    /**
     * The application name.
     */
    CharSequence title;

    /**
     * The intent used to start the application.
     */
    Intent intent;

    /**
     * The application icon.
     */
    Drawable icon;

    /**
     * When set to true, indicates that the icon has been resized.
     */
    boolean filtered;

    /**
     * Creates the application intent based on a component name and various launch flags.
     *
     * @param className the class name of the component representing the intent
     * @param launchFlags the launch flags
     */
    final void setActivity(ComponentName className, int launchFlags) {
        intent = new Intent(Intent.ACTION_MAIN);
        intent.addCategory(Intent.CATEGORY_LAUNCHER);
        intent.setComponent(className);
        intent.setFlags(launchFlags);
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (!(o instanceof ApplicationInfo)) {
            return false;
        }

        ApplicationInfo that = (ApplicationInfo) o;
        return title.equals(that.title) &&
                intent.getComponent().getClassName().equals(
                        that.intent.getComponent().getClassName());
    }

    @Override
    public int hashCode() {
        int result;
        result = (title != null ? title.hashCode() : 0);
        final String name = intent.getComponent().getClassName();
        result = 31 * result + (name != null ? name.hashCode() : 0);
        return result;
    }
}