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我正在使用不同的数据加载同一页面。我有它，所以它列出了我的项目，当我单击一个时，它会发送正确的下一页类型和 ID。但它仍在加载我的第一页 SQLStatement。正确的事情正在被注销。

我需要先清除它还是什么？

这是我的代码：

public class LocationListView extends Activity {

String SQLStatement;
String itemID = "1001-0001021";
String Type;
;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_location_list_view);

        Bundle extras = getIntent().getExtras(); 
        String dataType;
        String dataID;

        if (extras != null) {
            dataType = extras.getString("Type");
            dataID = extras.getString("ID");

        } else {
            dataType = "notset";
            dataID = "notset";
        }


        File dbfile = new File(Global.currentDBfull); 
        SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase(dbfile, null);

        if(dataType == "notset") {

            SQLStatement = "select * from stationobjects where stationid= " + Global.StationID + " and objectid=0";
            Type = "Room";

        } else if(dataType == "Room") {

            SQLStatement = "select * from stationobjects where stationid= " + Global.StationID + "  and objectid=1001 and diagramid like '"+ itemID +"%'";
            Type = "Area";

            Context context = getApplicationContext();
            CharSequence text = "Hello toast!";
            int duration = Toast.LENGTH_SHORT;

            Toast toast = Toast.makeText(context, text, duration);
            toast.show();

        } else if(dataType == "Area") {

            Type = "Zone";
        } else if(dataType == "Zone") {


        } else {

            SQLStatement = "select * from stationobjects where stationid= " + Global.StationID + " and objectid=0";
            Type = "Room";
        }


        Cursor c = db.rawQuery(SQLStatement, null);  
        if(c.getCount() != 0) {

        Log.e("LocationListView", "Found Items");   

        c.moveToFirst();

      ArrayList<String> mItemName = new ArrayList<String>();
      final ArrayList<String> mItemID = new ArrayList<String>();

        c.moveToFirst();
        while(!c.isAfterLast()) {
             mItemName.add(c.getString(c.getColumnIndex("Name")));
             mItemID.add(c.getString(c.getColumnIndex("StationObjectID")));
             c.moveToNext();
        }

        final ListView listView = (ListView) findViewById(R.id.lvLocation);
        final ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
              android.R.layout.simple_list_item_1, android.R.id.text1, mItemName);

        int[] colors = {0, 0xFFFF0000, 0}; 
        listView.setDivider(new GradientDrawable(Orientation.RIGHT_LEFT, colors));
        listView.setDividerHeight(1);
        listView.setAdapter(adapter); 

        listView.setClickable(true);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

          @Override
          public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {

            Object o = listView.getItemAtPosition(position);
            String StationObjectID = mItemID.get(position);
            Log.e("LocationListView", "" + o);
            Log.e("LocationListView", "" + StationObjectID);


            startActivityForResult(SwapPage, 0);

          }
        });

        } else {

            Log.e("LocationListView", "Not Found Items");   
            Context context = getApplicationContext();
            CharSequence text = "Sorry No data returned";
            int duration = Toast.LENGTH_LONG;

            Toast toast = Toast.makeText(context, text, duration);
            toast.show();
        }

        db.close();


    }




}
4

1 回答 1

2

您的 Intent 中的数据看起来是正确的，问题是在 Java 中您必须像这样 比较字符串：

if(dataType.equals("notset"))

不是：

if(dataType == "notset")

详解：Java中如何比较字符串？

于 2012-10-04T16:52:42.213 回答