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。
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;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
public class Main extends Activity implements OnClickListener {
Handler handler = new Handler();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
findViewById(R.id.btnSimpleToast).setOnClickListener(this);
findViewById(R.id.btnSimpleToastWithCustomPosition).setOnClickListener(
this);
findViewById(R.id.btnSimpleToastWithImage).setOnClickListener(this);
findViewById(R.id.btnCustomToast).setOnClickListener(this);
findViewById(R.id.btnRunToastFromOtherThread).setOnClickListener(this);
}
public void showToast() {
handler.post(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(), "我来自其他线程!",
Toast.LENGTH_SHORT).show();
}
});
}
@Override
public void onClick(View v) {
Toast toast = null;
switch (v.getId()) {
case R.id.btnSimpleToast:
Toast.makeText(getApplicationContext(), "默认Toast样式",
Toast.LENGTH_SHORT).show();
break;
case R.id.btnSimpleToastWithCustomPosition:
toast = Toast.makeText(getApplicationContext(),
"自定义位置Toast", Toast.LENGTH_LONG);
toast.setGravity(Gravity.CENTER, 0, 0);
toast.show();
break;
case R.id.btnSimpleToastWithImage:
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();
break;
case R.id.btnCustomToast:
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();
break;
case R.id.btnRunToastFromOtherThread:
new Thread(new Runnable() {
public void run() {
showToast();
}
}).start();
break;
}
}
}
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>
1.文字居中布局android:layout_gravity="center_verticl"
2.Handler动态更新UI
final Handler hander=new Hander();
new Thead(new Runnable(){
public void run(){
tab1=(ListView)findViewById(R.id.tab1);
final MyViewBinder myview=new MyViewBinder(TaskManagerActivity.this,R.layout.info,util.ProcessRunningInfo()); //获得动态加载集合
hander.post(new Runnale(){
public void run(){
tab1.setAdapter(myview);
}
});
}
});
3.android2.2自定义应用无法铺满屏幕,在AndroidManifest.xml加入如下代码
<supports-screens
android:largeScreens="true"
android:normalScreens="true"
android:smallScreens="true"
android:anyDensity="true" />
很久没有写点东西了。最近很烦心,领导不给力。一直在干一些枯燥的复制粘贴工作,烦的不得了。由于一些原因需要学习一下openfire插件开发和smack底层的通信,所以边学便写点东西。一是利于自己的记忆,二是如果有别人需要可以拿过来看看。
开发环境:myeclipse
首先下载openfire源码具体下载方式我就不说了,具体可以百度一下。我这里下载的是目前的最新版本openfire_src_3_7_0.tar。
第一步:在myeclipse新建一个java工程,我的工程的名字是openfire_src。如下图:
点击下一步。完成。你会发现有一个插件有错误,我的做法是去除这个插件(把报错的插件从引用的source中去掉)
第二部:
添加引用。添加后的样式如下:
至此准备工作已经差不多了。
配置运行环境:
设定主运行类:如下图:
在虚拟机参数栏设定openfirehome:
-DopenfireHome="${workspace_loc:openfire_src}/target/openfire"
第三部:编译工程
打开ant文件并运行:ant文件路径/openfire_src/build/build.xml
经过以上三步openfire的开发环境就算搭建好了。
下次说一下如何系一个openfire插件。现在网上的资料真实不给力,都是一个人写的,到处拷贝。