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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| package com.hjq.toast; | ||
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| import android.os.Handler; | ||
| import android.os.Looper; | ||
| import android.os.Message; | ||
| import android.widget.Toast; | ||
|
|
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| import java.util.Queue; | ||
| import java.util.concurrent.ArrayBlockingQueue; | ||
|
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| /** | ||
| * author : HJQ | ||
| * github : https://github.com/getActivity/ToastUtils | ||
| * time : 2018/11/12 | ||
| * desc : Toast 显示处理类 | ||
| */ | ||
| final class ToastHandler extends Handler { | ||
|
|
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| private static final int TYPE_SHOW = 1; // 显示吐司 | ||
| private static final int TYPE_CONTINUE = 2; // 继续显示 | ||
| private static final int TYPE_CANCEL = 3; // 取消显示 | ||
|
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| // 最大吐司的容量 | ||
| private static final int MAX_TOAST_CAPACITY = 5; | ||
|
|
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| // 吐司队列 | ||
| private volatile Queue<CharSequence> mQueue = new ArrayBlockingQueue<>(MAX_TOAST_CAPACITY); | ||
|
|
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| // 当前是否正在执行显示操作 | ||
| private volatile boolean isShow; | ||
|
|
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| // 吐司对象 | ||
| private final Toast mToast; | ||
|
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| ToastHandler(Toast toast) { | ||
| super(Looper.getMainLooper()); | ||
| mToast = toast; | ||
| } | ||
|
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| void setText(CharSequence s) { | ||
| if (mQueue.isEmpty() || !mQueue.contains(s)) { | ||
| // 添加一个元素并返回true，如果队列已满，则返回false | ||
| if (!mQueue.offer(s)) { | ||
| // 移除队列头部元素并添加一个新的元素 | ||
| mQueue.poll(); | ||
| mQueue.offer(s); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| void show() { | ||
| if (!isShow) { | ||
| isShow = true; | ||
| sendEmptyMessage(TYPE_SHOW); | ||
| } | ||
| } | ||
|
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| void cancel() { | ||
| if (isShow) { | ||
| isShow = false; | ||
| sendEmptyMessage(TYPE_CANCEL); | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public void handleMessage(Message msg) { | ||
| switch (msg.what) { | ||
| case TYPE_SHOW: | ||
| // 返回队列头部的元素，如果队列为空，则返回null | ||
| CharSequence text = mQueue.peek(); | ||
| if (text != null) { | ||
| mToast.setText(text); | ||
| mToast.show(); | ||
| // 等这个 Toast 显示完后再继续显示 | ||
| sendEmptyMessageDelayed(TYPE_CONTINUE, getToastDuration(text) + 1000); | ||
| }else { | ||
| isShow = false; | ||
| } | ||
| break; | ||
| case TYPE_CONTINUE: | ||
| // 移除并返问队列头部的元素，如果队列为空，则返回null | ||
| mQueue.poll(); | ||
| if (!mQueue.isEmpty()) { | ||
| sendEmptyMessage(TYPE_SHOW); | ||
| }else { | ||
| isShow = false; | ||
| } | ||
| break; | ||
| case TYPE_CANCEL: | ||
| isShow = false; | ||
| mQueue.clear(); | ||
| mToast.cancel(); | ||
| break; | ||
| default: | ||
| break; | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * 根据文本来获取吐司的显示时间 | ||
| */ | ||
| private static int getToastDuration (CharSequence text) { | ||
| // 如果显示的文字超过了10个就显示长吐司，否则显示短吐司 | ||
| return text.length() > 20 ? ToastHelper.LONG_DURATION_TIMEOUT : ToastHelper.SHORT_DURATION_TIMEOUT; | ||
| } | ||
| } |
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