1 package com.example.first;
2
3 import androidx.appcompat.app.AppCompatActivity;
4
5 import android.content.Intent;
6 import android.os.Bundle;
7 import android.view.View;
8 import android.widget.Button;
9
10 public class MainActivity extends AppCompatActivity {
11
12 private Button mbtnTextView;
13 private Button mbtnButton;
14 private Button mbtnEditText;
15 private Button mbtnRadioButton;
16
17 @Override
18 protected void onCreate(Bundle savedInstanceState) {
19 super.onCreate(savedInstanceState);
20 setContentView(R.layout.activity_main);
21
22 mbtnTextView = findViewById(R.id.btn_textview);
23 mbtnButton=findViewById(R.id.btn_button);
24 mbtnEditText=findViewById(R.id.btn_edittext);
25 mbtnRadioButton=findViewById((R.id.btn_radioButton));
26 setListeners();
27 }
28
29 //听说这样比较清楚
30 private void setListeners(){
31 Onclick onClick=new Onclick();
32 mbtnTextView.setOnClickListener(onClick);
33 mbtnButton.setOnClickListener(onClick);
34 mbtnEditText.setOnClickListener(onClick);
35 mbtnRadioButton.setOnClickListener(onClick);
36 }
37
38 public class Onclick implements View.OnClickListener{
39
40 @Override
41 public void onClick(View view) {
42 Intent intent=null;
43 switch (view.getId()){
44 case R.id.btn_textview:
45 intent=new Intent(MainActivity.this,TextViewActivity.class);
46 break;
47 case R.id.btn_button:
48 intent=new Intent(MainActivity.this,ButtonActivity3.class);
49 break;
50 case R.id.btn_edittext:
51 intent=new Intent(MainActivity.this,EditTextActivity.class);
52 break;
53 case R.id.btn_radioButton:
54 intent=new Intent(MainActivity.this,RadioButtonActivity.class);
55 break;
56 }
57 startActivity(intent);
58 }
59 }
60 }