列表視圖中的可單擊項

Question

我試圖使我的listview項目可點擊； 但無法使其正常運行。 當我單擊某個項目時，它會切換屏幕，但不會切換到所需的屏幕。 這是代碼

private ListView lv;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_signup);
    lv = (ListView) findViewById(R.id.listView1);
    // Instanciating an array list (you don't need to do this, you already have yours)
    ArrayList<String> menu_Items = new ArrayList<String>();
    menu_Items.add("Fill Treatment Form");
    menu_Items.add("View Medical History");
    menu_Items.add("View Medication");
    menu_Items.add("View Diet");
    menu_Items.add("View First Aid");
    menu_Items.add("Look Up Map");
    menu_Items.add("Account Settings");
    // This is the array adapter, it takes the context of the activity as a first // parameter, the type of list view as a second parameter and your array as a third parameter
    ArrayAdapter<String> arrayAdapter =      
    new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, menu_Items);
    lv.setAdapter(arrayAdapter);


    lv.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> arg0, View view, int position, long id) {

            Intent i = new Intent(getApplicationContext(), FillTreatmentActivity.class);
            startActivity(i);

        }

    });

    lv.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> arg1, View view, int position, long id) {

            Intent i = new Intent(getApplicationContext(), MedicalHistoryActivity.class);
            startActivity(i);
        }
    });

    lv.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> arg2, View view, int position, long id) {

            Intent i = new Intent(getApplicationContext(), MedicationActivity.class);
            startActivity(i);
        }
    });

    lv.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> arg3, View view, int position, long id) {

            Intent i = new Intent(getApplicationContext(),DietActivity.class);
            startActivity(i);
        }
    });

    lv.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> arg4, View view, int position, long id) {

            Intent i = new Intent(getApplicationContext(),FirstAidActivity.class);
            startActivity(i);
        }
    });

    lv.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> arg5, View view, int position, long id) {

            Intent i = new Intent(getApplicationContext(),MapActivity.class);
            startActivity(i);
        }
    });

   lv.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> arg6, View view, int position, long id) {

            Intent i = new Intent(getApplicationContext(),SettingsActivity.class);
            startActivity(i);
        }
    }); 
}

當我單擊任何一個列表視圖項時，“帳戶設置活動”將打開。 我是新手，所以請不要判斷我的編碼:)

Answer 1

一個listview只能有一個OnItemClickListener ，因此除最后一個OnItemClickListener所有東西都將被丟棄。 這就是無論您點擊哪個項目， SettingsActivity都是開放式的原因。

要解決此問題，請使用一個偵聽器，讓該偵聽器處理不同的選項。

lv.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> arg1, View view, int position, long id) {
        switch(position) {
           case 0:
               // start activity 1
               break;
           case 1:
               // start activity 2
               break;
           case 2:
               // start activity 3
               break;
           // more case statements

    }
});

Answer 2

為什么不在listview的布局中添加android:onClick="myClickMethod" ，然后創建一個具有相同名稱的方法？ 在其中，您可以看到完全按下了鞭狀視圖。 另外，listView只有一個onClickListener ;-)

干杯

Answer 3

嘗試向您的點擊監聽器添加switch語句

private ListView lv;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_signup);
    lv = (ListView) findViewById(R.id.listView1);
    // Instanciating an array list (you don't need to do this, you already have yours)
    ArrayList<String> menu_Items = new ArrayList<String>();
    menu_Items.add("Fill Treatment Form");
    menu_Items.add("View Medical History");
    menu_Items.add("View Medication");
    menu_Items.add("View Diet");
    menu_Items.add("View First Aid");
    menu_Items.add("Look Up Map");
    menu_Items.add("Account Settings");
    // This is the array adapter, it takes the context of the activity as a first // parameter, the type of list view as a second parameter and your array as a third parameter
    ArrayAdapter<String> arrayAdapter =      
    new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, menu_Items);
    lv.setAdapter(arrayAdapter);


    lv.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> arg0, View view, int position, long id) {
        switch(position){
          case 0:
        Intent i = new Intent(getApplicationContext(), FillTreatmentActivity.class);
                startActivity(i);
        break;
          case 1:
        Intent i = new Intent(getApplicationContext(), MedicalHistoryActivity.class);
            startActivity(i);
        break;
          case 2:
        Intent i = new Intent(getApplicationContext(), MedicationActivity.class);
            startActivity(i);
        break;
          case 3:
        Intent i = new Intent(getApplicationContext(),DietActivity.class);
                startActivity(i);
        break;
          case 4:
        Intent i = new Intent(getApplicationContext(),FirstAidActivity.class);
                startActivity(i);
        break;
          case 5:
        Intent i = new Intent(getApplicationContext(),MapActivity.class);
                startActivity(i);
        break;
          case 6:
        Intent i = new Intent(getApplicationContext(),SettingsActivity.class);
                startActivity(i);
        break;

        }


        }

    });
}

Answer 4

這是這樣做的方式； 我做錯了。 感謝您的幫助。 和平/

private ListView lv;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_signup);
    lv = (ListView) findViewById(R.id.listView1);
    // Instanciating an array list (you don't need to do this, you already have yours)
    ArrayList<String> menu_Items = new ArrayList<String>();
    menu_Items.add("Fill Treatment Form");
    menu_Items.add("View Medical History");
    menu_Items.add("View Medication");
    menu_Items.add("View Diet");
    menu_Items.add("View First Aid");
    menu_Items.add("Look Up Map");
    menu_Items.add("Account Settings");
    // This is the array adapter, it takes the context of the activity as a first // parameter, the type of list view as a second parameter and your array as a third parameter
    ArrayAdapter<String> arrayAdapter =      
    new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, menu_Items);
    lv.setAdapter(arrayAdapter);


    lv.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> arg0, View view, int position, long id) {
        switch(position){
          case 0:
        Intent i = new Intent(getApplicationContext(), FillTreatmentActivity.class);
                startActivity(i);
        break;
          case 1:
        Intent j = new Intent(getApplicationContext(), MedicalHistoryActivity.class);
            startActivity(j);
        break;
          case 2:
        Intent k = new Intent(getApplicationContext(), MedicationActivity.class);
            startActivity(k);
        break;
          case 3:
        Intent l = new Intent(getApplicationContext(),DietActivity.class);
                startActivity(l);
        break;
          case 4:
        Intent m = new Intent(getApplicationContext(),FirstAidActivity.class);
                startActivity(m);
        break;
          case 5:
        Intent n = new Intent(getApplicationContext(),MapActivity.class);
                startActivity(n);
        break;
          case 6:
        Intent o = new Intent(getApplicationContext(),SettingsActivity.class);
                startActivity(o);
        break;

        }


        }

    });

Answer 5

您需要在Listener上創建它將處理所有列表。 像這樣：

lv.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView arg6, View view, int position, long id) {
swith(position){
        case 1:
        Intent i = new Intent(getApplicationContext(), FillTreatmentActivity.class);
            startActivity(i);
            break;
        case 2:
        ...
        }
        }
    });

或者，您可以擴展ArrayAdaptyer類並為每個元素實現單個偵聽器