一个可以替代Toast的简单MessageView

系统自带的Toast有时候不能满足我们的需求，现在提供一个可以快速替代Toast的方案。
项目地址：



源码：

/*
 * Copyright 2012 Evgeny Shishkin
 *
 * 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.devspark.appmsg.sample;

import java.util.LinkedList;
import java.util.Queue;

import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;

/**
 * @author Evgeny Shishkin
 */
class MsgManager extends Handler {

    private static final int MESSAGE_DISPLAY = 0xc2007;
    private static final int MESSAGE_ADD_VIEW = 0xc20074dd;
    private static final int MESSAGE_REMOVE = 0xc2007de1;

    private static MsgManager mInstance;

    private Queue<AppMsg> msgQueue;
    private Animation inAnimation, outAnimation;

    private MsgManager() {
        msgQueue = new LinkedList<AppMsg>();
    }

    /**
     * @return The currently used instance of the {@link MsgManager}.
     */
    static synchronized MsgManager getInstance() {
        if (mInstance == null) {
            mInstance = new MsgManager();
        }
        return mInstance;
    }

    /**
     * Inserts a {@link AppMsg} to be displayed.
     *
     * @param appMsg
     */
    void add(AppMsg appMsg) {
        msgQueue.add(appMsg);
        if (inAnimation == null) {
            inAnimation = AnimationUtils.loadAnimation(appMsg.getActivity(),
                    android.R.anim.fade_in);
        }
        if (outAnimation == null) {
            outAnimation = AnimationUtils.loadAnimation(appMsg.getActivity(),
                    android.R.anim.fade_out);
        }
        displayMsg();
    }

    /**
     * Removes all {@link AppMsg} from the queue.
     */
    void clearMsg(AppMsg appMsg) {
        if(msgQueue.contains(appMsg)){
            // Avoid the message from being removed twice.
            removeMessages(MESSAGE_REMOVE);
            msgQueue.remove(appMsg);
            removeMsg(appMsg);
        }
    }

    /**
     * Removes all {@link AppMsg} from the queue.
     */
    void clearAllMsg() {
        if (msgQueue != null) {
            msgQueue.clear();
        }
        removeMessages(MESSAGE_DISPLAY);
        removeMessages(MESSAGE_ADD_VIEW);
        removeMessages(MESSAGE_REMOVE);
    }

    /**
     * Displays the next {@link AppMsg} within the queue.
     */
    private void displayMsg() {
        if (msgQueue.isEmpty()) {
            return;
        }
        // First peek whether the AppMsg is being displayed.
        final AppMsg appMsg = msgQueue.peek();
        // If the activity is null we throw away the AppMsg.
        if (appMsg.getActivity() == null) {
            msgQueue.poll();
        }
        final Message msg;
        if (!appMsg.isShowing()) {
            // Display the AppMsg
            msg = obtainMessage(MESSAGE_ADD_VIEW);
            msg.obj = appMsg;
            sendMessage(msg);
        } else {
            msg = obtainMessage(MESSAGE_DISPLAY);
            sendMessageDelayed(msg, appMsg.getDuration()
                    + inAnimation.getDuration() + outAnimation.getDuration());
        }
    }

    /**
     * Removes the {@link AppMsg}'s view after it's display duration.
     *
     * @param appMsg The {@link AppMsg} added to a {@link ViewGroup} and should be removed.s
     */
    private void removeMsg(final AppMsg appMsg) {
        ViewGroup parent = ((ViewGroup) appMsg.getView().getParent());
        if (parent != null) {
            outAnimation.setAnimationListener(new OutAnimationListener(appMsg));
            appMsg.getView().startAnimation(outAnimation);
            // Remove the AppMsg from the queue.
            msgQueue.poll();
            if (appMsg.isFloating()) {
                // Remove the AppMsg from the view's parent.
                parent.removeView(appMsg.getView());
            } else {
                appMsg.getView().setVisibility(View.INVISIBLE);
            }

            Message msg = obtainMessage(MESSAGE_DISPLAY);
            sendMessage(msg);
        }
    }

    private void addMsgToView(AppMsg appMsg) {
        View view = appMsg.getView();
        if (view.getParent() == null) {
            appMsg.getActivity().addContentView(
                    view,
                    appMsg.getLayoutParams());
        }
        view.startAnimation(inAnimation);
        if (view.getVisibility() != View.VISIBLE) {
            view.setVisibility(View.VISIBLE);
        }
        final Message msg = obtainMessage(MESSAGE_REMOVE);
        msg.obj = appMsg;
        sendMessageDelayed(msg, appMsg.getDuration());
    }

    @Override
    public void handleMessage(Message msg) {
        final AppMsg appMsg;
        switch (msg.what) {
            case MESSAGE_DISPLAY:
                displayMsg();
                break;
            case MESSAGE_ADD_VIEW:
                appMsg = (AppMsg) msg.obj;
                addMsgToView(appMsg);
                break;
            case MESSAGE_REMOVE:
                appMsg = (AppMsg) msg.obj;
                removeMsg(appMsg);
                break;
            default:
                super.handleMessage(msg);
                break;
        }
    }

    private static class OutAnimationListener implements Animation.AnimationListener {

        private AppMsg appMsg;

        private OutAnimationListener(AppMsg appMsg) {
            this.appMsg = appMsg;
        }

        @Override
        public void onAnimationStart(Animation animation) {

        }

        @Override
        public void onAnimationEnd(Animation animation) {
            if (!appMsg.isFloating()) {
                appMsg.getView().setVisibility(View.GONE);
            }
        }

        @Override
        public void onAnimationRepeat(Animation animation) {

        }
    }
}

/*
 * Copyright 2012 Evgeny Shishkin
 *
 * 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.devspark.appmsg.sample;

import android.app.Activity;
import android.content.Context;
import android.content.res.Resources;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.FrameLayout;
import android.widget.TextView;

/**
 * In-layout notifications. Based on {@link android.widget.Toast} notifications
 * and article by Cyril Mottier (http://android.cyrilmottier.com/?p=773).
 *
 * @author e.shishkin
 */
public class AppMsg {

    /**
     * Show the view or text notification for a short period of time. This time
     * could be user-definable. This is the default.
     *
     * @see #setDuration
     */
    public static final int LENGTH_SHORT = 3000;

    /**
     * Show the view or text notification for a long period of time. This time
     * could be user-definable.
     *
     * @see #setDuration
     */
    public static final int LENGTH_LONG = 5000;

    /**
     * Show the text notification for a long period of time with a negative style.
     */
    public static final Style STYLE_ALERT = new Style(LENGTH_LONG, R.color.alert);

    /**
     * Show the text notification for a short period of time with a positive style.
     */
    public static final Style STYLE_CONFIRM = new Style(LENGTH_SHORT, R.color.confirm);

    /**
     * Show the text notification for a short period of time with a neutral style.
     */
    public static final Style STYLE_INFO = new Style(LENGTH_SHORT, R.color.info);

    private final Activity mContext;
    private int mDuration = LENGTH_SHORT;
    private View mView;
    private LayoutParams mLayoutParams;
    private boolean mFloating;

    /**
     * Construct an empty AppMsg object. You must call {@link #setView} before
     * you can call {@link #show}.
     *
     * @param context The context to use. Usually your
     *                {@link android.app.Activity} object.
     */
    public AppMsg(Activity context) {
        mContext = context;
    }

    /**
     * Make a {@link AppMsg} that just contains a text view.
     *
     * @param context The context to use. Usually your
     *                {@link android.app.Activity} object.
     * @param text    The text to show. Can be formatted text.
     * @param style   The style with a background and a duration.
     */
    public static AppMsg makeText(Activity context, CharSequence text, Style style) {
        return makeText(context, text, style, R.layout.app_msg);
    }
    
    /**
     * @author mengguoqiang 扩展支持设置字体大小
     * Make a {@link AppMsg} that just contains a text view.
     *
     * @param context The context to use. Usually your
     *                {@link android.app.Activity} object.
     * @param text    The text to show. Can be formatted text.
     * @param style   The style with a background and a duration.
     */
    public static AppMsg makeText(Activity context, CharSequence text, Style style, float textSize) {
        return makeText(context, text, style, R.layout.app_msg, textSize);
    }

    /**
     * Make a {@link AppMsg} with a custom layout. The layout must have a {@link TextView} com id {@link android.R.id.message}
     *
     * @param context The context to use. Usually your
     *                {@link android.app.Activity} object.
     * @param text    The text to show. Can be formatted text.
     * @param style   The style with a background and a duration.
     */
    public static AppMsg makeText(Activity context, CharSequence text, Style style, int layoutId) {
        LayoutInflater inflate = (LayoutInflater)
                context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View v = inflate.inflate(layoutId, null);

        return makeText(context, text, style, v, true);
    }
    
    /**
     * @author mengguoqiang 扩展支持字体大小
     * Make a {@link AppMsg} with a custom layout. The layout must have a {@link TextView} com id {@link android.R.id.message}
     *
     * @param context The context to use. Usually your
     *                {@link android.app.Activity} object.
     * @param text    The text to show. Can be formatted text.
     * @param style   The style with a background and a duration.
     */
    public static AppMsg makeText(Activity context, CharSequence text, Style style, int layoutId, float textSize) {
        LayoutInflater inflate = (LayoutInflater)
                context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View v = inflate.inflate(layoutId, null);

        return makeText(context, text, style, v, true, textSize);
    }

    /**
     * Make a non-floating {@link AppMsg} with a custom view presented inside the layout.
     * It can be used to create non-floating notifications if floating is false.
     *
     * @param context  The context to use. Usually your
     *                 {@link android.app.Activity} object.
     * @param customView
     *                 View to be used.
     * @param text     The text to show. Can be formatted text.
     * @param style    The style with a background and a duration.
     */
    public static AppMsg makeText(Activity context, CharSequence text, Style style, View customView) {
       return makeText(context, text, style, customView, false);
    }

    /**
     * Make a {@link AppMsg} with a custom view. It can be used to create non-floating notifications if floating is false.
     *
     * @param context  The context to use. Usually your
     *                 {@link android.app.Activity} object.
     * @param view
     *                 View to be used.
     * @param text     The text to show. Can be formatted text.
     * @param style    The style with a background and a duration.
     * @param floating true if it'll float.
     */
    private static AppMsg makeText(Activity context, CharSequence text, Style style, View view, boolean floating) {
        return makeText(context, text, style, view, floating, 0);
    }
    
    /**
     * 
     * @author mengguoqiang 扩展支持设置字体大小
     * Make a {@link AppMsg} with a custom view. It can be used to create non-floating notifications if floating is false.
     *
     * @param context  The context to use. Usually your
     *                 {@link android.app.Activity} object.
     * @param view
     *                 View to be used.
     * @param text     The text to show. Can be formatted text.
     * @param style    The style with a background and a duration.
     * @param floating true if it'll float.
     */
    private static AppMsg makeText(Activity context, CharSequence text, Style style, View view, boolean floating, float textSize) {
        AppMsg result = new AppMsg(context);

        view.setBackgroundResource(style.background);

        TextView tv = (TextView) view.findViewById(android.R.id.message);
        if(textSize > 0) tv.setTextSize(textSize);
        tv.setText(text);

        result.mView = view;
        result.mDuration = style.duration;
        result.mFloating = floating;

        return result;
    }

    /**
     * Make a {@link AppMsg} with a custom view. It can be used to create non-floating notifications if floating is false.
     *
     * @param context  The context to use. Usually your
     *                 {@link android.app.Activity} object.
     * @param resId    The resource id of the string resource to use. Can be
     *                 formatted text.
     * @param style    The style with a background and a duration.
     * @param floating true if it'll float.
     */
    public static AppMsg makeText(Activity context, int resId, Style style, View customView, boolean floating) {
        return makeText(context, context.getResources().getText(resId), style, customView, floating);
    }

    /**
     * Make a {@link AppMsg} that just contains a text view with the text from a
     * resource.
     *
     * @param context The context to use. Usually your
     *                {@link android.app.Activity} object.
     * @param resId   The resource id of the string resource to use. Can be
     *                formatted text.
     * @param style   The style with a background and a duration.
     * @throws Resources.NotFoundException if the resource can't be found.
     */
    public static AppMsg makeText(Activity context, int resId, Style style)
            throws Resources.NotFoundException {
        return makeText(context, context.getResources().getText(resId), style);
    }

    /**
     * Make a {@link AppMsg} with a custom layout using the text from a
     * resource. The layout must have a {@link TextView} com id {@link android.R.id.message}
     *
     * @param context The context to use. Usually your
     *                {@link android.app.Activity} object.
     * @param resId   The resource id of the string resource to use. Can be
     *                formatted text.
     * @param style   The style with a background and a duration.
     * @throws Resources.NotFoundException if the resource can't be found.
     */
    public static AppMsg makeText(Activity context, int resId, Style style, int layoutId)
            throws Resources.NotFoundException {
        return makeText(context, context.getResources().getText(resId), style, layoutId);
    }

    /**
     * Show the view for the specified duration.
     */
    public void show() {
        MsgManager manager = MsgManager.getInstance();
        manager.add(this);
    }

    /**
     * @return <code>true</code> if the {@link AppMsg} is being displayed, else <code>false</code>.
     */
    public boolean isShowing() {
        if (mFloating) {
            return mView != null && mView.getParent() != null;
        } else {
            return mView.getVisibility() == View.VISIBLE;
        }
    }

    /**
     * Close the view if it's showing, or don't show it if it isn't showing yet.
     * You do not normally have to call this.  Normally view will disappear on its own
     * after the appropriate duration.
     */
    public void cancel() {
        MsgManager.getInstance().clearMsg(this);

    }

    /**
     * Cancels all queued {@link AppMsg}s. If there is a {@link AppMsg}
     * displayed currently, it will be the last one displayed.
     */
    public static void cancelAll() {
        MsgManager.getInstance().clearAllMsg();
    }

    /**
     * Return the activity.
     */
    public Activity getActivity() {
        return mContext;
    }

    /**
     * Set the view to show.
     *
     * @see #getView
     */
    public void setView(View view) {
        mView = view;
    }

    /**
     * Return the view.
     *
     * @see #setView
     */
    public View getView() {
        return mView;
    }

    /**
     * Set how long to show the view for.
     *
     * @see #LENGTH_SHORT
     * @see #LENGTH_LONG
     */
    public void setDuration(int duration) {
        mDuration = duration;
    }

    /**
     * Return the duration.
     *
     * @see #setDuration
     */
    public int getDuration() {
        return mDuration;
    }

    /**
     * Update the text in a AppMsg that was previously created using one of the makeText() methods.
     *
     * @param resId The new text for the AppMsg.
     */
    public void setText(int resId) {
        setText(mContext.getText(resId));
    }

    /**
     * Update the text in a AppMsg that was previously created using one of the makeText() methods.
     *
     * @param s The new text for the AppMsg.
     */
    public void setText(CharSequence s) {
        if (mView == null) {
            throw new RuntimeException("This AppMsg was not created with AppMsg.makeText()");
        }
        TextView tv = (TextView) mView.findViewById(android.R.id.message);
        if (tv == null) {
            throw new RuntimeException("This AppMsg was not created with AppMsg.makeText()");
        }
        tv.setText(s);
    }

    /**
     * Gets the crouton's layout parameters, constructing a default if necessary.
     *
     * @return the layout parameters
     */
    public LayoutParams getLayoutParams() {
        if (mLayoutParams == null) {
            mLayoutParams = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
        }
        return mLayoutParams;
    }

    /**
     * Sets the layout parameters which will be used to display the crouton.
     *
     * @param layoutParams The layout parameters to use.
     * @return <code>this</code>, for chaining.
     */
    public AppMsg setLayoutParams(LayoutParams layoutParams) {
        mLayoutParams = layoutParams;
        return this;
    }

    /**
     * Constructs and sets the layout parameters to have some gravity.
     *
     * @param gravity the gravity of the Crouton
     * @return <code>this</code>, for chaining.
     * @see android.view.Gravity
     */
    public AppMsg setLayoutGravity(int gravity) {
        mLayoutParams = new FrameLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT, gravity);
        return this;
    }

    /**
     * Return the value of floating.
     *
     * @see #setFloating(boolean)
     */
    public boolean isFloating() {
        return mFloating;
    }

    /**
     * Sets the value of floating.
     *
     * @param mFloating
     */
    public void setFloating(boolean mFloating) {
        this.mFloating = mFloating;
    }

    /**
     * The style for a {@link AppMsg}.
     *
     * @author e.shishkin
     */
    public static class Style {

        private final int duration;
        private final int background;

        /**
         * Construct an {@link AppMsg.Style} object.
         *
         * @param duration How long to display the message. Either
         *                 {@link #LENGTH_SHORT} or {@link #LENGTH_LONG}
         * @param resId    resource for AppMsg background
         */
        public Style(int duration, int resId) {
            this.duration = duration;
            this.background = resId;
        }

        /**
         * Return the duration in milliseconds.
         */
        public int getDuration() {
            return duration;
        }

        /**
         * Return the resource id of background.
         */
        public int getBackground() {
            return background;
        }

        @Override
        public boolean equals(Object o) {
            if (!(o instanceof AppMsg.Style)) {
                return false;
            }
            Style style = (Style) o;
            return style.duration == duration
                    && style.background == background;
        }

    }

}

用法：

/*
 * Copyright 2012 Evgeny Shishkin
 *
 * 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.devspark.appmsg.sample;

import android.app.Activity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;

/**
 * Sample of AppMsg library.
 * 
 * @author Evgeny Shishkin
 * SherlockActivity
 */
public class MainActivity extends Activity {

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

    /**
     * Button onClick listener.
     * 
     * @param v
     */
    public void showAppMsg(View v) {
        final CharSequence msg = ((Button) v).getText();
        final AppMsg.Style style;
        switch (v.getId()) {
            case R.id.alert:
                style = AppMsg.STYLE_ALERT;
                break;
            case R.id.confirm:
                style = AppMsg.STYLE_CONFIRM;
                break;
            case R.id.info:
                style = AppMsg.STYLE_INFO;
                break;
            case R.id.custom:
                style = new AppMsg.Style(AppMsg.LENGTH_SHORT, R.color.custom);
                break;

            default:
                return;
        }

        // create {@link AppMsg} with specify type
        AppMsg appMsg = AppMsg.makeText(this, msg, style);
        if (((CheckBox) (findViewById(R.id.bottom))).isChecked()) {
            appMsg.setLayoutGravity(Gravity.BOTTOM);
        }
        appMsg.show();
    }

}

详情看附件。

评论

3 楼 qwildwolf 2016-06-20  

多谢楼主

2 楼 mufaith 2014-09-22  

123

1 楼 mufaith 2014-09-22  

123[b][/b]