安卓--信息提示框（Toast）实例

main.xml代码如下：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button 
        android:id="@+id/btn_long"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="长时间显示Toast"/>
    <Button 
        android:id="@+id/btn_short"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="短时间显示Toast"/>
</LinearLayout>

package org.lxh.demo;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.text.method.ScrollingMovementMethod;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.Button;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

public class Hello extends Activity {
	private Button btn_long = null;
	private Button btn_short = null;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState); // 生命周期方法
		super.setContentView(R.layout.main); // 设置要使用的布局管理器
		this.btn_long = (Button) super.findViewById(R.id.btn_long);
		this.btn_short = (Button) super.findViewById(R.id.btn_short);
		this.btn_long.setOnClickListener(new OnClickListenerLong());
		this.btn_short.setOnClickListener(new OnClickListenerShort());
	}

	private class OnClickListenerLong implements OnClickListener {

		public void onClick(View view) {
			Toast.makeText(Hello.this, "长时间显示Toast提示信息框", Toast.LENGTH_LONG)
					.show();

		}

	}

	private class OnClickListenerShort implements OnClickListener {

		public void onClick(View view) {
			Toast.makeText(Hello.this, "短时间显示Toast提示信息框", Toast.LENGTH_SHORT)
					.show();

		}

	}
}