无法启动 activity ComponentInfo.....java.lang.IllegalStateException: 已附加

Unable to start activity ComponentInfo.....java.lang.IllegalStateException: Already attached

我收到了那个错误,如你所见,我正在添加我从第一个 activity 中获取的数据,并将其存储到第二个 activity 中的数组中. 然后我使用数组填充列表视图。所以问题是每当我单击第一个视图上的保存按钮时 public class Main2Activity 扩展 AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main2);
    super.onCreate(savedInstanceState);
    // setContentView(Your_Layout);
    //Bundle extras = null;
    //if(getIntent().getExtras() != null){
    //    extras = getIntent().getExtras();
    //}

    Intent intent = getIntent();
    //  ListView lv = (ListView) findViewById(R.id.View);

    String data = intent.getStringExtra("data");
    String first = intent.getStringExtra("stringOne");
    String second = intent.getStringExtra("stringTwo");
    String Third = intent.getStringExtra("stringThree");
    String Fourth = intent.getStringExtra("stringFour");
    String Fifth = intent.getStringExtra("stringFive");
    String Sixth = intent.getStringExtra("stringSix");

    // Find the ListView resource.
    ListView lv = (ListView) findViewById( R.id.View );

    // Create and populate a List of planet names.
    String[] dataUser = new String[] { first,second,Third,Fourth,Fifth,Sixth};
    ArrayList<String> dataList = new ArrayList<String>();
    dataList.addAll(Arrays.asList(dataUser));

    // Create ArrayAdapter using the planet list.
    ArrayAdapter<String> listAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, dataList);

    // Set the ArrayAdapter as the ListView's adapter.
    lv.setAdapter(listAdapter);
}

}

您的代码中有 2 个 super.onCreate(savedInstanceState);,删除其中一个。

所以我确实删除了扩展 super.onCreate(savedInstanceState);我有,但看起来我的编辑文本之一正在传递一个 nul 值。所以我遍历了每一行,但正如你所看到的,所有的 edixtext 都传递了一个 null 的差异 http://pastebin.com/mys3R8QQ