com.google.android.gcm.demo.ui.AbstractFragment.java Source code

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Here is the source code for com.google.android.gcm.demo.ui.AbstractFragment.java

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/*
Copyright 2015 Google Inc. All Rights Reserved.
    
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.google.android.gcm.demo.ui;

import android.content.ClipData;
import android.content.ClipboardManager;
import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.text.Html;
import android.text.method.LinkMovementMethod;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

import com.google.android.gcm.demo.R;

/**
 * This is the base class for all the fragments used by the {@link MainActivity}.
 * This class provides useful methods for performing UI operations such as creating expandable text,
 * handling long clicks by copying the content of a view to clipboard and handling text that is
 * too long to be displayed.
 */
public abstract class AbstractFragment extends Fragment implements View.OnLongClickListener {
    private static final String STATE_FRAGMENT = "state_fragment";

    // Keys used for saving and restoring this fragment's state
    protected static final String SENDER_ID = "sender_id";
    protected static final String API_KEY = "api_key";
    protected static final String TOKEN = "token";

    protected Bundle mFragmentState = new Bundle();

    protected void loadSavedState(Bundle savedState) {
        if (savedState != null) {
            mFragmentState = savedState.getBundle(STATE_FRAGMENT);
        }
    }

    @Override
    public void onSaveInstanceState(Bundle savedState) {
        super.onSaveInstanceState(savedState);
        savedState.putBundle(STATE_FRAGMENT, mFragmentState);
    }

    @Override
    public boolean onLongClick(View v) {
        // Copy in the clipboard the value of the selected widget.
        String value = getValue(v.getId());
        if (value.length() > 0) {
            ClipboardManager clipboard = (ClipboardManager) getActivity()
                    .getSystemService(Context.CLIPBOARD_SERVICE);
            clipboard.setPrimaryClip(ClipData.newPlainText("GcmTestApp clipboard", value));
            Toast.makeText(getActivity(), value + "\nhas been copied in the clipboard", Toast.LENGTH_SHORT).show();
            return true;
        }
        return false;
    }

    protected String getValue(int viewId) {
        View view = getActivity().findViewById(viewId);
        return getValue(view);
    }

    protected void setValueFromFragmentState(View view, String stateKey) {
        Object value = mFragmentState.get(stateKey);
        if (value != null) {
            if (value instanceof String[]) {
                String[] values = (String[]) value;
                if (values.length >= 2) {
                    setValue(view, values[0], values[1]);
                } else if (values.length == 1) {
                    setValue(view, null, values[0]);
                }
            } else {
                setValue(view, null, value.toString());
            }
        }
    }

    protected void setValue(View view, String value) {
        setValue(view, null, value);
    }

    protected void setValue(int id, String name, String value) {
        setValue(getActivity().findViewById(id), name, value);
    }

    protected void setHtmlMode(View parent, int viewId) {
        TextView description = (TextView) parent.findViewById(viewId);
        description.setMovementMethod(LinkMovementMethod.getInstance());
        description.setText(Html.fromHtml(getValue(parent.findViewById(viewId))));
    }

    public static String getValue(View view) {
        if (view.getTag(R.id.tag_clipboard_value) instanceof String) {
            return (String) view.getTag(R.id.tag_clipboard_value);
        }
        if (view instanceof TextView) {
            return ((TextView) view).getText().toString();
        }
        if (view instanceof Spinner) {
            return ((Spinner) view).getSelectedItem().toString();
        }
        return "";
    }

    public static void setValue(View view, String name, String value) {
        if (view == null) {
            return;
        }
        if (view instanceof TextView) {
            if (name != null && value != null) {
                ((TextView) view).setText(name + " (" + truncateToMediumString(value) + ")");
                view.setTag(R.id.tag_clipboard_value, value);
            } else if (value != null) {
                ((TextView) view).setText(truncateToLongString(value));
                view.setTag(R.id.tag_clipboard_value, value);
            } else {
                ((TextView) view).setText(truncateToLongString(name));
                view.setTag(R.id.tag_clipboard_value, name);
            }
        }
    }

    public static String truncateToLongString(String value) {
        return truncateString(value, 27);
    }

    public static String truncateToMediumString(String value) {
        return truncateString(value, 19);
    }

    public static String truncateToShortString(String value) {
        return truncateString(value, 11);
    }

    public static String truncateString(String value, int maxLength) {
        maxLength = (maxLength < 5) ? 5 : maxLength;
        int tail = (maxLength - 3) / 2;
        if (value.length() > maxLength) {
            return value.substring(0, tail) + "..." + value.substring(value.length() - tail, value.length());
        } else {
            return value;
        }
    }

    protected static boolean isNotEmpty(String s) {
        return s != null && !"".equals(s.trim());
    }

    /**
     * Override this method to receive the user's selection from the AddressBook.
     */
    public void handleAddressBookSelection(int id, String name, String value) {
    }
}