安卓-信息提示框（Toast）范例

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();		}	}}