Question

我在android开发中很新鲜。我开始学习并通过listview中的可点击按钮停止工作！

  `public class Test2 extends AppCompatActivity {
    private static final String TAG = "Test2";
    Button btnEdytuj;
    DatabaseHelper myDb;
    SimpleCursorAdapter dataAdapter;`

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_test2);
    myDb = new DatabaseHelper(this);
    displayList();
}

private void displayList() {
    Cursor cursor = myDb.getAllData();
    String from[] = new String[]{myDb.COL_ID, myDb.COL_NAZWA, myDb.COL_LAT, myDb.COL_LON};
    int to[] = new int[]{R.id.textView10, R.id.textView1, R.id.textView2, R.id.textView3};
    dataAdapter = new SimpleCursorAdapter(this, R.layout.row_item_edit, cursor, from, to, 0);

    ListView lv = (ListView) findViewById(R.id.listViewId);
    lv.setAdapter(dataAdapter);
    lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
            btnEdytuj = (Button) view.findViewById(R.id.buttonEE);
            btnEdytuj.setOnClickListener(new View.OnClickListener(){
                @Override
                public void onClick(View v){
                    // Do something
                    Intent intent = new Intent(Test2.this,Edytuj.class);
                    startActivity(intent);`

我的愿望是通过按下一行或按钮并传递一个id来处理编辑，从意图触发器列表中打开新活动。

我发现了一个错误，可能有助于弄明白：

android.support.v7.widget.ListViewCompat.lookForSelectablePosition(int, boolean) would have incorrectly overridden the package-private method in android.widget.ListView

Answer 1

列表适配器中的

执行此操作：

这是获取视图功能：

private TextToSpeech tts;

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

    tts = new TextToSpeech(this, this);
    ((Button) findViewById(R.id.bSpeak)).setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            speakOut(((TextView) findViewById(R.id.tvTranslatedText)).getText().toString());
        }
    });

    ((Button) findViewById(R.id.bTranslate)).setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            class bgStuff extends AsyncTask<String, Void, String> {
                @Override
                protected String doInBackground(String... params) {
                    // TODO Auto-generated method stub
                    try {
                        if (params.length > 0) {
                            return translate(params[0]);
                        }
                    } catch (Exception e) {
                        e.printStackTrace();
                        return e.toString();
                    }
                    return null;
                }

                @Override
                protected void onPostExecute(String result) {
                    ((TextView) findViewById(R.id.tvTranslatedText)).setText(result);
                }
            }

            new bgStuff().execute(((EditText) findViewById(R.id.etUserText)).getText().toString());
        }
    });
}

public String translate(String text) throws Exception {


    // Set the Client ID / Client Secret once per JVM. It is set statically and applies to all services
    Translate.setClientId("CLIENT ID"); //Change this
    Translate.setClientSecret("CLIENT SECRET"); //change


    String translatedText = "";

    translatedText = Translate.execute(text, Language.GERMAN);

    return translatedText;
}

@Override
public void onInit(int status) {
    // TODO Auto-generated method stub
    if (status == TextToSpeech.SUCCESS) {

        int result = tts.setLanguage(Locale.GERMAN);

        if (result == TextToSpeech.LANG_MISSING_DATA
                || result == TextToSpeech.LANG_NOT_SUPPORTED) {
            Log.e("TTS", "This Language is not supported");
        } else {

            //speakOut("Ich");
        }

    } else {
        Log.e("TTS", "Initilization Failed!");
    }
}

private void speakOut(String text) {
    tts.speak(text, TextToSpeech.QUEUE_FLUSH, null);
}

另一个用于绑定视图：

  @Override
        public View getView(int position, View convertView, ViewGroup parent) {

            if (inflater == null)
                inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            if (convertView == null)
                convertView = inflater.inflate(R.layout.list_note, null);

          btnEdytuj = (Button) convertView.findViewById(R.id.buttonEE);
          btnEdytuj.setOnClickListener(new View.OnClickListener(){
             @Override
             public void onClick(View v){ 
             // Do something
               }
           });

      }

            return convertView;
        }

Answer 2

你走了：

 listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
            //Write your code here
        }
    });

希望这有帮助。

Answer 3

您必须将onClick方法按钮放在Adapter类中。

使用SimpleCursorAdapter时，请使用button-inside-simplecursoradapter作为参考。

Answer 4

请在您的活动类中编写以下代码。

<强> MainActivity.java

ArrayList<MobileData> searchResults = getMobileData();
final ListView lv1 = (ListView) findViewById(R.id.ListView01);
lv1.setAdapter(new MobileAdapter(this, searchResults));

使用适配器类添加所有列表项，并在adaptaer类中添加按钮事件。

<强> MobileAdapter.java

public class MobileAdapter extends BaseAdapter {

private static ArrayList<MobileData> searchArrayList;

private LayoutInflater mInflater;
private Context context;
MobilezonDAO dao;

public MobileAdapter(Context context, ArrayList<MobileData> results) {
    this.context = context;
    searchArrayList = results;
    mInflater = LayoutInflater.from(context);
    dao = new MobilezonDAO(this.context);
}

public int getCount() {
    return searchArrayList.size();
}

public Object getItem(int position) {
    return searchArrayList.get(position);
}

public long getItemId(int position) {
    return position;
}

public View getView(int position, View convertView, ViewGroup parent) {
    final ViewHolder holder;
    if (convertView == null) {
        convertView = mInflater.inflate(R.layout.mobile_row_view, null);
        holder = new ViewHolder();

        holder.mobileImage = (ImageView) convertView.findViewById(R.id.mobileImage);
        holder.mobileName = (TextView) convertView.findViewById(R.id.mobileName);
        holder.mobilePrice = (TextView) convertView.findViewById(R.id.mobilePrice);
        holder.mobileBrand = (TextView) convertView.findViewById(R.id.mobileBrand);
        holder.viewDetails = (Button) convertView.findViewById(R.id.viewDetails);
        holder.addToCart = (Button) convertView.findViewById(R.id.addToCart);

        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }


    holder.mobileImage.setImageBitmap(searchArrayList.get(position).getMobileImage());
    holder.mobileName.setText(searchArrayList.get(position).getMobileName());
    holder.mobilePrice.setText("Price: $"+searchArrayList.get(position).getMobilePrice());
    holder.mobileBrand.setText("Brand: "+searchArrayList.get(position).getMobileBrand());
    holder.viewDetails.setBackgroundResource(R.drawable.view_details);
    holder.viewDetails.setId(position);
    holder.addToCart.setBackgroundResource(R.drawable.addtocart);

    holder.viewDetails.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            MobileData mobileData = searchArrayList.get(holder.viewDetails.getId());

            Intent intent= new Intent(context, MobileViewDetailsActivity.class);
            intent.putExtra("ModelNumber", mobileData.getModelNumber());

            context.startActivity(intent);
        }
    });

    holder.addToCart.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            MobileData mobileData = searchArrayList.get(holder.viewDetails.getId());

            CartData cartData = new CartData();
            cartData.setUsername(emailid);
            cartData.setModelNumber(mobileData.getModelNumber());
            cartData.setPrice(mobileData.getMobilePrice());
            cartData.setQuantity("1");

            CartData tempCartData = dao.searchParticularCartData(cartData.getUsername(), cartData.getModelNumber());

            if(tempCartData!=null && tempCartData.getQuantity()!=null && Integer.valueOf(tempCartData.getQuantity())>0){
                Snackbar.make(view, "Selected Mobile already added in your cart.", Snackbar.LENGTH_LONG).setAction("Action", null).show();
            }else{
                dao.insertCartData(cartData);
                Snackbar.make(view, "Mobile has been successfully added in your cart.", Snackbar.LENGTH_LONG).setAction("Action", null).show();
            }
        }
    });

    return convertView;
}

static class ViewHolder {
    ImageView mobileImage;
    TextView mobileName;
    TextView mobilePrice;
    TextView mobileBrand;
    Button viewDetails;
    Button addToCart;
}

}

无法使用listview行

4 个答案: