android Toast 消息提示 例子

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    <TextView android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="这是一个Toast示例"/>
    <Button android:id="@+id/bt_showToast"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="显示Toast"/>

</LinearLayout>

package com.example.ch7;

import com.example.baseexample.R;

import android.app.Activity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.Toast;

public class ToastActivity extends Activity {

	private Button bt_showToast;
	public void onCreate(Bundle savedInstanceState){
		super.onCreate(savedInstanceState);
		setContentView(R.layout.ch7_toast);
		
		bt_showToast = (Button)findViewById(R.id.bt_showToast);
		bt_showToast.setOnClickListener(new Button.OnClickListener(){

			@Override
			public void onClick(View arg0) {
				Toast toast = Toast.makeText(ToastActivity.this, "这是一个带图片的Toast", Toast.LENGTH_LONG);
				LinearLayout toastView = (LinearLayout)toast.getView();
				ImageView imageView = new ImageView(ToastActivity.this);
				imageView.setImageResource(R.drawable.a);
				toastView.addView(imageView);
				toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
				toast.show();
				
			}
			
		});
	}
}