Question

我正在尝试将坐标发送到MapsActivity，我想用吐司测试代码，但它不会创建任何吐司。其他任何事情都很有效......

我的原始代码有意图，我看到他们没有工作，检查，我添加了祝酒词，我看到它仍然无法正常工作。

行只包含两个TextView。没别了。

此外，我尝试使用按钮发送数据，按钮也不起作用......

对不起，我的英语很差，所以我希望我能很好地解释我的问题。

以下代码是我的MainActivity.java的简短版本。

public class MainActivity extends AppCompatActivity implements LocationListener {
    private TextView latituteField;

    ArrayList<HashMap<String, String>> studentList;
    private TextView longitudeField;
    private ListView lsv;
    private LocationManager locationManager;
    private String provider;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        lsv = (ListView) findViewById(R.id.listView);
         ...
    }
    ...
    @Override
    public void onLocationChanged(Location location) {
// I'm refreshing the page if location changed, so the reason of running this code is this.
        lsv.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Toast.makeText(getApplicationContext(),"A",Toast.LENGTH_LONG);
            }
        });
    }
    ...
//Here comes the AsyncTask,
    class RequestTask extends AsyncTask<String, String, String> {
        // Hashmap for ListView
        String viewcor;
        private RequestTask(String coord) {
            this.viewcor= coord;
        }
        ...
        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);
            //TextView AsA = (TextView) findViewById(R.id.textView3);
            ListView ssss = (ListView) findViewById(R.id.listView);
            //AsA.setText(s+"");
            final ListAdapter adapter = new SimpleAdapter(
                    MainActivity.this, studentList,
                    R.layout.lust, new String[]{"id","mesafe"}, new int[]{R.id.name, R.id.mesafe});
            ssss.setAdapter(adapter);
        }

Answer 1

将.show()添加到Toast.makeText(getApplicationContext(),"A",Toast.LENGTH_LONG);

像这样：Toast.makeText(getApplicationContext(),"A",Toast.LENGTH_LONG).show();

OnItemClickListener不适用于LocationManager

1 个答案: