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();

}

});
}
}