无法启动活动 ComponentInfo.....java.lang.IllegalStateException：已附加

我收到了该错误，正如您所看到的，我正在添加从第一个活动中获取的数据并将其存储到第二个活动中的数组中。 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公共类 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);
}

}

你有 2super.onCreate(savedInstanceState);在您的代码中，删除其中之一。