1 package com.geli_2.sujie.sujiegeili2testbutton;
2
3 import android.os.Bundle;
4 import android.support.v7.app.AppCompatActivity;
5 import android.view.View;
6 import android.widget.Button;
7 import android.widget.Toast;
8
9 public class MainActivity extends AppCompatActivity implements View.OnClickListener
10 {
11
12 private Button mBtClick;
13 private Button mBtClick2;
14 private Button mBtClick3;
15 private Button mBtClick4;
16
17 @Override
18 protected void onCreate(Bundle savedInstanceState)
19 {
20 super.onCreate(savedInstanceState);
21 setContentView(R.layout.activity_main);
22 mBtClick = (Button) findViewById(R.id.btnTest1); //1、fdv 找到button id
23 // 2、 Alt Ctrl F 形成类全局Field
24 mBtClick.setOnClickListener(new View.OnClickListener() //3、键入此行代码自动嵌入内部类方法
25 {
26 @Override
27 public void onClick(View v)
28 { //4、 Toast tab tab 调出toast 方法 以上为方法一
29 Toast.makeText(MainActivity.this, "hello world1", Toast.LENGTH_SHORT).show();
30 }
31 });
32
33
34 mBtClick2 = (Button) findViewById(R.id.btnSample2); //5、找出button 2 的 button id fdv
35 mBtClick2.setOnClickListener(new Button_2_OnClickListener()); //9、实例化方法给button 绑定 以上是方法二
36 mBtClick3 = (Button) findViewById(R.id.btnTry3); //10、找出button 3 的 button id fdv
37 mBtClick3.setOnClickListener(this); //11、 this 表示 main acitivity
38 //12 但是这里是方法参数是onclicklistener接口，此处 this Alt Enter 会在此方法上加上实现的接口以上是方法三
39 mBtClick4 = (Button) findViewById(R.id.btnExample4); //5、找出button 4 的 button id fdv 方法四这行没用
40
41
42 }
43
44 /**
45 * Called when a view has been clicked.
46 *
47 * @param v The view that was clicked.
48 */
49 @Override
50 public void onClick(View v)
51 {
52 Toast.makeText(MainActivity.this, "hello world 3", Toast.LENGTH_SHORT).show();//方法三
53 }
54
55 class Button_2_OnClickListener implements View.OnClickListener //6、设置一个 click 方法 命名后继承自 view
56 // onclicklistener
57 //7、 后在 继承 implements 上 alt + enter 来实现方法
58 {
59
60 /**
61 * Called when a view has been clicked.
62 *
63 * @param v The view that was clicked.
64 */
65 @Override
66 public void onClick(View v)
67 {
68 Toast.makeText(MainActivity.this, "hello world 2", Toast.LENGTH_SHORT).show();//方法二
69 }
70 }
71 public void click(View view)
72 {
73 Toast.makeText(MainActivity.this, "hello world 4", Toast.LENGTH_SHORT).show();//方法四
74 }
75
76 }
