Android自定义Toast
16lz
2021-01-23
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:
<h2> /** * 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; }</h2> 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
<span style="font-size:18px;">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; }}</span> 上面有一句话要注意:
<span style="font-size:18px;">Construct an empty Toast object. You must call {@link #setView} before you * can call {@link #show}.</span> 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
<span style="font-size:18px;"> public static Toast makeText(Context context,int imgId,CharSequence hintText,boolean showFailure,int duration)</span>
<span style="font-size: 18px;"> 参数解释:</span>
<span style="font-size: 18px;"><span style="white-space:pre"></span>context:上下文</span>
<span style="font-size: 18px;"><span style="white-space:pre"></span>imgId:显示图片资源</span>
<span style="font-size: 18px;"><span style="white-space:pre"></span>hintText:显示提示信息</span>
<span style="font-size: 18px;"><span style="white-space:pre"></span>showFailure:是否显示错误信息</span>
<span style="font-size: 18px;"><span style="white-space:pre"></span>duration:显示时长</span>
调用Toast:
<span style="font-size:18px;"><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(); }</span> 显示效果:
That's all
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