toast用于向用户显示一些帮助/提示。下面我做了5中效果，来说明toast的强大，定义一个属于你自己的toast。
注意：
length_long—长时间显示视图或文本提示
length_short—短时间显示视图或文本提示
setgravity(int gravity,int xoffset,int yoffset)—设置提示应该在屏幕上的显示的位置
setduration(int duartion)—设置提示显示的持续时间
1.默认效果
代码
toast.maketext(getapplicationcontext(), "默认toast样式",
toast.length_short).show();
2.自定义显示位置效果
代码
toast = toast.maketext(getapplicationcontext(),
"自定义位置toast", toast.length_long);
toast.setgravity(gravity.center, 0, 0);
toast.show();
3.带图片效果
代码
toast = toast.maketext(getapplicationcontext(),
"带图片的toast", toast.length_long);
toast.setgravity(gravity.center, 0, 0);
linearlayout toastview = (linearlayout) toast.getview();
imageview imagecodeproject = new imageview(getapplicationcontext());
imagecodeproject.setimageresource(r.drawable.icon);
toastview.addview(imagecodeproject, 0);
toast.show();
4.完全自定义效果
代码
layoutinflater inflater = getlayoutinflater();
view layout = inflater.inflate(r.layout.custom,
(viewgroup) findviewbyid(r.id.lltoast));
imageview image = (imageview) layout
.findviewbyid(r.id.tvimagetoast);
image.setimageresource(r.drawable.icon);
textview title = (textview) layout.findviewbyid(r.id.tvtitletoast);
title.settext("attention");
textview text = (textview) layout.findviewbyid(r.id.tvtexttoast);
text.settext("完全自定义toast");
toast = new toast(getapplicationcontext());
toast.setgravity(gravity.right | gravity.top, 12, 40);
toast.setduration(toast.length_long);
toast.setview(layout);
toast.show();
5.其他线程
代码
new thread(new runnable() {
public void run() {
showtoast();
}
}).start();
完整代码
1.main,java
package com.wjq.toast;<br>import android.app.activity;<br>import android.os.bundle;
<br>import android.os.handler;<br>import android.view.gravity;<br>import android.view.layoutinflater;
<br>import android.view.view;<br>import android.view.viewgroup;<br>import android.view.view.onclicklistener;
<br>import android.widget.imageview;<br>import android.widget.linearlayout;<br>import android.widget.textview;
<br>import android.widget.toast;<br>public class main extends activity implements onclicklistener
{<br>handler handler = new handler();<br>@override<br>public void oncreate(bundle savedinstancestate)
{<br> super.oncreate(savedinstancestate);<br> setcontentview(r.layout.main);<br>
findviewbyid(r.id.btnsimpletoast).setonclicklistener(this);<br>
findviewbyid(r.id.btnsimpletoastwithcustomposition).setonclicklistener(<br> this);<br>
findviewbyid(r.id.btnsimpletoastwithimage).setonclicklistener(this);<br> findviewbyid(r.id.btncustomtoast).setonclicklistener(this);<br>
findviewbyid(r.id.btnruntoastfromotherthread).setonclicklistener(this);<br>}<br>public void showtoast() {<br> handler.post(new runnable() {<br> @override<br>
public void run() {<br> toast.maketext(getapplicationcontext(), "我来自其他线程！",<br> toast.length_short).show();<br> }<br> });<br>}<br>@override
<br>public void onclick(view v) {<br> toast toast = null;<br> switch (v.getid()) {<br> case r.id.btnsimpletoast:<br>
toast.maketext(getapplicationcontext(), "默认toast样式",<br> toast.length_short).show();<br> break;<br> case r.id.btnsimpletoastwithcustomposition:<br>
toast = toast.maketext(getapplicationcontext(),<br> "自定义位置toast", toast.length_long);<br> toast.setgravity(gravity.center, 0, 0);<br>
toast.show();<br> break;<br> case r.id.btnsimpletoastwithimage:<br> toast = toast.maketext(getapplicationcontext(),
"带图片的toast", toast.length_long);
toast.setgravity(gravity.center, 0, 0);
linearlayout toastview = (linearlayout) toast.getview();
imageview imagecodeproject = new imageview(getapplicationcontext());
imagecodeproject.setimageresource(r.drawable.icon);
toastview.addview(imagecodeproject, 0);
toast.show();<br> break;<br> case r.id.btncustomtoast:<br> layoutinflater inflater = getlayoutinflater();
view layout = inflater.inflate(r.layout.custom,
(viewgroup) findviewbyid(r.id.lltoast));
imageview image = (imageview) layout
.findviewbyid(r.id.tvimagetoast);
image.setimageresource(r.drawable.icon);
textview title = (textview) layout.findviewbyid(r.id.tvtitletoast);
title.settext("attention");
textview text = (textview) layout.findviewbyid(r.id.tvtexttoast);
text.settext("完全自定义toast");
toast = new toast(getapplicationcontext());
toast.setgravity(gravity.right | gravity.top, 12, 40);
toast.setduration(toast.length_long);
toast.setview(layout);
toast.show();<br> break;<br> case r.id.btnruntoastfromotherthread:<br> new thread(new runnable() {
public void run() {
showtoast();
}
}).start();<br> break;<br> }<br>}<br>}
2.main,xml
<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent" android:padding="5dip" android:gravity="center">
<button android:layout_height="wrap_content"
android:layout_width="fill_parent" android:id="@+id/btnsimpletoast"
android:text="默认"></button>
<button android:layout_height="wrap_content"
android:layout_width="fill_parent" android:text="自定义显示位置"
android:id="@+id/btnsimpletoastwithcustomposition"></button>
<button android:layout_height="wrap_content"
android:layout_width="fill_parent" android:id="@+id/btnsimpletoastwithimage"
android:text="带图片"></button>
<button android:layout_height="wrap_content"
android:layout_width="fill_parent" android:text="完全自定义"
android:id="@+id/btncustomtoast"></button>
<button android:layout_height="wrap_content"
android:layout_width="fill_parent" android:text="其他线程"
android:id="@+id/btnruntoastfromotherthread"></button>
</linearlayout>
3.custom.xml
<?xml version="1.0" encoding="utf-8"?>
<linearlayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="wrap_content" android:layout_width="wrap_content"
android:background="#ffffffff" android:orientation="vertical"
android:id="@+id/lltoast" >
<textview
android:layout_height="wrap_content"
android:layout_margin="1dip"
android:textcolor="#ffffffff"
android:layout_width="fill_parent"
android:gravity="center"
android:background="#bb000000"
android:id="@+id/tvtitletoast" />
<linearlayout
android:layout_height="wrap_content"
android:orientation="vertical"
android:id="@+id/lltoastcontent"
android:layout_marginleft="1dip"
android:layout_marginright="1dip"
android:layout_marginbottom="1dip"
android:layout_width="wrap_content"
android:padding="15dip"
android:background="#44000000" >
<imageview
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_width="wrap_content"
android:id="@+id/tvimagetoast" />
<textview
android:layout_height="wrap_content"
android:paddingright="10dip"
android:paddingleft="10dip"
android:layout_width="wrap_content"
android:gravity="center"
android:textcolor="#ff000000"
android:id="@+id/tvtexttoast" />
</linearlayout>
</linearlayout>
以上就是android ui控件系列：toast（提示）的内容。