Android 5中不同效果的Toast

package com.otn.android.toast;

import java.util.Timer;
import java.util.TimerTask;

import android.app.Activity;
import android.app.AlertDialog;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

public class MyToast extends Activity implements OnClickListener {
	private static final String TOASTBTN_1 = "这是默认的Toast显示";
	private static final String TOASTBTN_2 = "这是自定义位置的Toast显示";
	private static final String TOASTBTN_3 = "这是带图片的Toast显示";
	private static final String TOASTBTN_4 = "这是完全自定义的Toast显示";
	private static final String TOASTBTN_5 = "这是长时间的Toast显示";
	private Button toastBtn_1, toastBtn_2, toastBtn_3, toastBtn_4, toastBtn_5;
	private Toast toast = null;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		toastBtn_1 = (Button) findViewById(R.id.button_1);
		toastBtn_2 = (Button) findViewById(R.id.button_2);
		toastBtn_3 = (Button) findViewById(R.id.button_3);
		toastBtn_4 = (Button) findViewById(R.id.button_4);
		toastBtn_5 = (Button) findViewById(R.id.button_5);
		toastBtn_1.setOnClickListener(this);
		toastBtn_2.setOnClickListener(this);
		toastBtn_3.setOnClickListener(this);
		toastBtn_4.setOnClickListener(this);
		toastBtn_5.setOnClickListener(this);
	}

	@Override
	public void onClick(View v) {
		AlertDialog.Builder builder;
		AlertDialog dialog;
		switch (v.getId()) {
		case R.id.button_1:
			toast.makeText(getApplicationContext(), TOASTBTN_1, Toast.LENGTH_LONG).show();
			break;

		case R.id.button_2:
			toast = Toast.makeText(getApplicationContext(), TOASTBTN_2,
					Toast.LENGTH_LONG);
			toast.setGravity(Gravity.CENTER, 0, 0);
			toast.show();
			break;

		case R.id.button_3:
			toast = Toast.makeText(getApplicationContext(), TOASTBTN_3,
					Toast.LENGTH_LONG);
			toast.setGravity(Gravity.CENTER, 50, -100);
			LinearLayout layout = (LinearLayout) toast.getView();
			ImageView image = new ImageView(getApplicationContext());
			image.setImageResource(R.drawable.wallpaper_tree_small);
			layout.addView(image, 0);
			toast.show();
			break;

		case R.id.button_4:
			LayoutInflater inflater = getLayoutInflater();
			View view = inflater.inflate(R.layout.userdefinedtoast,
					(ViewGroup) findViewById(R.id.toast_layout));
			TextView txtView_Title = (TextView) view
					.findViewById(R.id.txt_Title);
			TextView txtView_Context = (TextView) view
					.findViewById(R.id.txt_context);
			ImageView imageView = (ImageView) view
					.findViewById(R.id.image_toast);
			toast = new Toast(getApplicationContext());
			toast.setGravity(Gravity.CENTER, 0, 0);
			toast.setDuration(Toast.LENGTH_LONG);
			toast.setView(view);
			toast.show();
			break;
			
		case R.id.button_5:
			LayoutInflater inflater1 = getLayoutInflater();
			View view1 = inflater1.inflate(R.layout.userdefinedtoast,
					(ViewGroup) findViewById(R.id.toast_layout));
			TextView txtView_Title1 = (TextView) view1
					.findViewById(R.id.txt_Title);
			TextView txtView_Context1 = (TextView) view1
					.findViewById(R.id.txt_context);
			ImageView imageView1 = (ImageView) view1
					.findViewById(R.id.image_toast);
			builder = new AlertDialog.Builder(this);
			builder.setView(view1);
			dialog = builder.create();
			dialog.show();
			toast.makeText(this, TOASTBTN_5, Toast.LENGTH_LONG).show();
			break;

		default:
			break;
		}
	}
}