android使用者介面-提示資訊Toast

在程式中建立toast的步驟說明如下

1、調用toast的靜態方法makeText()添加現實文本和時間長度。

2、調用toast的show()顯示。

 

執行個體如下：

/Chapter04_UI_Toast/src/com/amaker/test/MainActivity.java

代碼

package com.amaker.test;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity {
/** Called when the activity is first created. */
private Button b1,b2;
    @Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        b1 = (Button)findViewById(R.id.Button01);
        b2 = (Button)findViewById(R.id.Button02);

final int l = Toast.LENGTH_LONG;
final int s = Toast.LENGTH_SHORT;
final String s1 = "我多顯示一會兒！";
final String s2 = "我少顯示一會兒！";

        b1.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
                Toast t1 = Toast.makeText(getApplicationContext(), s1, l);
                t1.show();
            }
        });

        b2.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
                Toast t2 = Toast.makeText(getApplicationContext(), s2, s);
                t2.show();
            }
        });

    }
}