用户界面3-(Toast对话框)

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Toast:

一.默认位置Toast

二.屏幕中心Toast

package com.example.mychapter04_ui_toast;import android.app.Activity;import android.os.Bundle;import android.view.Gravity;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.Toast;public class MainActivity extends Activity {private Button btn01;private Button btn02;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);btn01= (Button)this.findViewById(R.id.Button01);btn02=(Button)this.findViewById(R.id.Button02);btn01.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubToast toast= Toast.makeText(MainActivity.this, "屏幕中心", Toast.LENGTH_SHORT);toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);toast.show();}});btn02.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubToast.makeText(MainActivity.this, "默认位置", Toast.LENGTH_SHORT).show();}});}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}}

用户界面3-(Toast对话框)

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