Android学习笔记之自定义Toast

（1）布局文件layout

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="104dp"
        android:layout_marginTop="70dp"
        android:text="普通的Toast" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@+id/button1"
        android:layout_below="@+id/button1"
        android:layout_marginTop="50dp"
        android:text="自定义的Toast" />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/toast_layout_root"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#DAA"
    android:orientation="horizontal"
    android:padding="8dp" >

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginRight="8dp"
        android:src="@drawable/in" />

    <TextView
        android:id="@+id/text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginRight="8dp" />

</LinearLayout>

package com.lc.toastdialog;

import android.app.Activity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {

	private Button button1;
	private Button button2;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		button1 = (Button) this.findViewById(R.id.button1);
		button2 = (Button) this.findViewById(R.id.button2);
		/*
		 * 普通的Toast
		 */
		button1.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				Toast.makeText(MainActivity.this, "普通的Toast",
						Toast.LENGTH_SHORT).show();
			}
		});
		/*
		 * 自定义的Toast
		 */
		button2.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				// 找到toast这个layout
				View layout = LayoutInflater.from(MainActivity.this).inflate(
						R.layout.toast, null);
				// 对toast文件中的textView设置值
				TextView textView = (TextView) layout.findViewById(R.id.text);
				textView.setText("hello world!");

				Toast toast = new Toast(MainActivity.this);
				toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
				toast.setDuration(Toast.LENGTH_SHORT);
				toast.setView(layout);
				toast.show();
			}
		});
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}