Question

我有两个Class page1和page2。当单击page1中的按钮时，如何将页面1中的数据从page1传输到整数

我尝试了几个代码： Page1.Class

protected void onListItemClick(ListView l, View v, int position, long id) {
        Intent i = null;
        switch (position) 
        {
        case 0:
            i = new Intent(this, page2.class );
        i.putExtra("Konum", 2);
        break;

        }
        startActivity(i);

Page2.Class

Intent intent = getIntent();
    private Integer konum = intent.getIntExtra("Konum", 0);

但不起作用！ 当点击page1中的按钮时，如何将第1页的数据从page1传输到整数

EROR：

    09-27 19:50:19.556: E/AndroidRuntime(528): FATAL EXCEPTION: main
09-27 19:50:19.556: E/AndroidRuntime(528): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{ru.truba.touchgallery/ru.truba.touchgallery.GalleryUrlActivity}: java.lang.NullPointerException
09-27 19:50:19.556: E/AndroidRuntime(528):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1569)
09-27 19:50:19.556: E/AndroidRuntime(528):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
09-27 19:50:19.556: E/AndroidRuntime(528):  at android.app.ActivityThread.access$1500(ActivityThread.java:117)
09-27 19:50:19.556: E/AndroidRuntime(528):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
09-27 19:50:19.556: E/AndroidRuntime(528):  at android.os.Handler.dispatchMessage(Handler.java:99)
09-27 19:50:19.556: E/AndroidRuntime(528):  at android.os.Looper.loop(Looper.java:123)
09-27 19:50:19.556: E/AndroidRuntime(528):  at android.app.ActivityThread.main(ActivityThread.java:3683)
09-27 19:50:19.556: E/AndroidRuntime(528):  at java.lang.reflect.Method.invokeNative(Native Method)

Answer 1

 Intent i = new Intent(this, ActivityTwo.class);
  i.putExtra("Value1", 1);
  startActivity(i);

和oncreate（）之后的其他活动

Bundle extras = getIntent().getExtras();
int value1 = extras.getint("Value1",0);

请参阅Android Intents

上的详细教程

如何将整数数据从page1传输到page2？

1 个答案: