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=""

 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=""

 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>