Android自定义Toast

来源：互联网发布：博奥2014软件下载编辑：程序博客网时间：2024/05/21 13:22

今天在写PDA的时候用到了自定义的Toast比较经典于是记录一下

首先看一下android的Toast的源码发现:

   /**     * Make a standard toast that just contains a text view.     *     * @param context  The context to use.  Usually your {@link android.app.Application}     *                 or {@link android.app.Activity} object.     * @param text     The text to show.  Can be formatted text.     * @param duration How long to display the message.  Either {@link #LENGTH_SHORT} or     *                 {@link #LENGTH_LONG}     *     */    public static Toast makeText(Context context, CharSequence text, int duration) {        Toast result = new Toast(context);        LayoutInflater inflate = (LayoutInflater)                context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);        View v = inflate.inflate(com.android.internal.R.layout.transient_notification, null);        TextView tv = (TextView)v.findViewById(com.android.internal.R.id.message);        tv.setText(text);                result.mNextView = v;        result.mDuration = duration;        return result;    }

注释写着仅仅是个包含了一个TextView的Toast

不难发现这个Toast用了一个系统自带的layout去展示Toast的布局,然后用了result.mNextView 跟 result.mDuration把Toast跟传递的参数和显示的布局聚合起来,知道了原理我们就可以自定义Toast了

1,首先我们要自定一个布局来显示我们想要Toast显示的效果

2,通过传递参数跟我们自定义布局里面的组件进行交互

3,通过setView把我们的布局跟我们的Toast联系起来

<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical" android:layout_width="match_parent"    android:layout_height="match_parent"    android:background="@drawable/toast_shape"    >    <RelativeLayout        android:layout_width="match_parent"        android:layout_height="match_parent"        android:orientation="horizontal"        android:gravity="center"        >        <ImageView            android:id="@+id/iv_hint_icon"            android:layout_width="35dp"            android:layout_height="35dp"            android:src="@drawable/pda_failure_icon"            android:layout_marginLeft="5dp"            />        <TextView            android:id="@+id/tv_hint_text"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:textStyle="bold"            android:textSize="28sp"            android:textColor="#eb4e4e"            android:layout_marginLeft="5dp"            android:text="上架失败 !"            android:layout_toRightOf="@+id/iv_hint_icon"            />        <TextView            android:id="@+id/tv_check_add_info"            android:layout_below="@+id/tv_hint_text"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:textStyle="bold"            android:textSize="22sp"            android:textColor="#eb4e4e"            android:layout_marginTop="20dp"            android:layout_marginLeft="5dp"            android:text="请仔细核对上架信息!"            />    </RelativeLayout></LinearLayout></span>

接下来是定义的shape代码

<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android">    <corners android:radius="10dp" />    <solid android:color="#ffffff" />    <stroke android:color="#000000" android:width="2dp"/>    <padding android:bottom="30dp" android:left="30dp" android:right="30dp" android:top="30dp" /></shape></span>

自定义Toast代码

public class PDAToast extends Toast{    /**     * Construct an empty Toast object.  You must call {@link #setView} before you     * can call {@link #show}.     *     * @param context The context to use.  Usually your {@link Application}     *                or {@link Activity} object.     */    public PDAToast(Context context) {        super(context);    }    public static Toast makeText(Context context,int imgId,CharSequence hintText,boolean showFailure,int duration){        Toast mToast = new Toast(context);        LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);        View layout = mInflater.inflate(R.layout.pda_toast_layout,null);//TODO 设置对话框的布局        ImageView hint_icon = (ImageView) layout.findViewById(R.id.iv_hint_icon);        hint_icon.setImageResource(imgId);        TextView hint = (TextView) layout.findViewById(R.id.tv_hint_text);        hint.setText(hintText);        TextView failure_desc = (TextView) layout.findViewById(R.id.tv_check_add_info);        if(showFailure){            failure_desc.setVisibility(View.VISIBLE);        }else{            failure_desc.setVisibility(View.GONE);        }        mToast.setView(layout);        mToast.setGravity(Gravity.CENTER,0,0);        mToast.setDuration(duration);        return mToast;    }}

上面有一句话要注意:

Construct an empty Toast object.  You must call {@link #setView} before you     * can call {@link #show}

提示构造一个空的Toast的话,在你show之前必须调用SetView否则会报错

 public static Toast makeText(Context context,int imgId,CharSequence hintText,boolean showFailure,int duration)

 参数解释:

context:上下文

imgId:显示图片资源

hintText:显示提示信息

showFailure:是否显示错误信息

duration:显示时长

调用Toast:

<span style="white-space:pre"></span>     @Override            public void onSuccess(BaseResponseData dataObj, String jsonString) {                PDAToast.makeText(AddActivity.this,R.drawable.pda_success_icon,"上架成功 !",false,Toast.LENGTH_SHORT).show();            }            @Override            public void onFailure(int resCode, String msg, String jsonString) {                Log.e("TAG","result:"+resCode +" error desc :"+msg +" response data:"+jsonString);                PDAToast.makeText(AddActivity.this,R.drawable.pda_failure_icon,"上架失败 !",true,Toast.LENGTH_SHORT).show();            }

显示效果:

That's all

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