OnClick() funktioniert nur einmal?

1package com.example.androidapptest;
2
3import android.os.Bundle;
4import android.app.Activity;
5import android.view.Menu;
6import android.view.View;
7import android.widget.Button;
8import android.widget.TextView;
9import java.util.Calendar;
10
11public class MainActivity extends Activity {
12
13 @Override
14 protected void onCreate(Bundle savedInstanceState) {
15 super.onCreate(savedInstanceState);
16 setContentView(R.layout.activity_main);
17
18 Button button1;
19 final TextView textView1;
20 final Calendar cal = Calendar.getInstance();
21
22 button1 = (Button)findViewById(R.id.button1);
23 textView1 = (TextView)findViewById(R.id.textView1);
24
25
26 button1.setOnClickListener(new View.OnClickListener()
27 {
28
29 @Override
30 public void onClick(View v)
31 {
32 textView1.setText(cal.getTime().toString());
33 }
34 });
35 }
36
37 @Override
38 public boolean onCreateOptionsMenu(Menu menu) {
39 // Inflate the menu; this adds items to the action bar if it is present.
40 getMenuInflater().inflate(R.menu.main, menu);
41 return true;
42 }
43
44}

1package com.example.androidapptest;
2
3import android.os.Bundle;
4import android.app.Activity;
5import android.view.Menu;
6import android.view.View;
7import android.widget.Button;
8import android.widget.TextView;
9import java.util.Calendar;
10
11public class MainActivity extends Activity {
12
13 @Override
14 protected void onCreate(Bundle savedInstanceState) {
15 super.onCreate(savedInstanceState);
16 setContentView(R.layout.activity_main);
17
18 }
19
20 @Override
21 public boolean onCreateOptionsMenu(Menu menu) {
22 // Inflate the menu; this adds items to the action bar if it is present.
23 getMenuInflater().inflate(R.menu.main, menu);
24 return true;
25 }
26
27 public static void main(String[] args)
28 {
29 final Button button1;
30 button1 = (Button)findViewById(R.id.button1);
31 TextView textView1 = (TextView)findViewById(R.id.textView1);
32
33 Calendar cal = Calendar.getInstance();
34
35 button1.setOnClickListener(new View.OnClickListener()
36 {
37
38 @Override
39 public void onClick(View v)
40 {
41 textView1.setText(cal.getTime().toString());
42 }
43 });
44 }
45
46}