Android 中侦听器内的侦听器按钮

Question

我有以下代码...这个列表基本上是"侦听"要单击的项目，一旦单击，它就会打开一个对话框，里面有一个按钮。我无法让按钮听...即使我这样做...应用程序将崩溃。而且 eclipse 不会自动允许我"覆盖"onClick（）

WeatherAdapter adapter = new WeatherAdapter(this,R.layout.listview_header_row, weather_data);
            listView1 = (ListView)findViewById(R.id.listView1);
            View header = (View)getLayoutInflater().inflate(R.layout.listview_header_row, null);
            //listView1.addHeaderView(header);
            listView1.setAdapter(adapter);  
            listView1.setClickable(true);
            listView1.setOnItemClickListener(new AdapterView.OnItemClickListener() {
              @Override
              public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
                    Dialog  dialog = new Dialog (Activity2.this);
                    dialog.setContentView(R.layout.dialogxml);
                    dialog.setCancelable(true);
                    ImageView dcover=(ImageView) dialog.findViewById(R.id.dimageView1);
                    TextView dtitle = (TextView) dialog.findViewById(R.id.dtextView1);
                    TextView dyear = (TextView) dialog.findViewById(R.id.dtextView2);
                    TextView ddirector = (TextView) dialog.findViewById(R.id.dtextView3);
                    TextView drating = (TextView) dialog.findViewById(R.id.dtextView4);
                    TextView len1 = (TextView) dialog.findViewById(R.id.textView77);
                    Button postbutton=(Button) findViewById(R.id.buttonfb);
                    InputStream is;
                    try {
                        is = (InputStream) new URL(full_data[position][0]).getContent();
                        Drawable dd = Drawable.createFromStream(is, "src name");
                        dcover.setImageDrawable(dd);
                    } catch (MalformedURLException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }

                    dtitle.setText("Name: "+full_data[position][1]);
                    dyear.setText("Year: "+full_data[position][2]);
                    ddirector.setText("Director: "+full_data[position][4]);
                    drating.setText("Rating: "+full_data[position][3]+"/10");
                    dialog.show();
          //NOT ABLE TO DO THIS!!          postbutton.setOnClickListener(new View.OnClickListener() { 
                        @Override
                        public void onClick(View v) {
                        }
                      });

              }

Answer 1

用这个替换你的代码。

因为您的按钮位于对话框内，因此您需要使用对话框视图进行findviewbyid。

WeatherAdapter adapter = new WeatherAdapter(this,R.layout.listview_header_row, weather_data);
        listView1 = (ListView)findViewById(R.id.listView1);
        View header = (View)getLayoutInflater().inflate(R.layout.listview_header_row, null);
        //listView1.addHeaderView(header);
        listView1.setAdapter(adapter);  
        listView1.setClickable(true);
        listView1.setOnItemClickListener(new AdapterView.OnItemClickListener() {
          @Override
          public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
                Dialog  dialog = new Dialog (Activity2.this);
                dialog.setContentView(R.layout.dialogxml);
                dialog.setCancelable(true);
                ImageView dcover=(ImageView) dialog.findViewById(R.id.dimageView1);
                TextView dtitle = (TextView) dialog.findViewById(R.id.dtextView1);
                TextView dyear = (TextView) dialog.findViewById(R.id.dtextView2);
                TextView ddirector = (TextView) dialog.findViewById(R.id.dtextView3);
                TextView drating = (TextView) dialog.findViewById(R.id.dtextView4);
                TextView len1 = (TextView) dialog.findViewById(R.id.textView77);
                Button postbutton=(Button) dialog.findViewById(R.id.buttonfb);
                InputStream is;
                try {
                    is = (InputStream) new URL(full_data[position][0]).getContent();
                    Drawable dd = Drawable.createFromStream(is, "src name");
                    dcover.setImageDrawable(dd);
                } catch (MalformedURLException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

                dtitle.setText("Name: "+full_data[position][1]);
                dyear.setText("Year: "+full_data[position][2]);
                ddirector.setText("Director: "+full_data[position][4]);
                drating.setText("Rating: "+full_data[position][3]+"/10");
                dialog.show();
            postbutton.setOnClickListener(new View.OnClickListener() { 
                    @Override
                    public void onClick(View v) {
                    }
                  });

          }

Answer 2

捕获错误

Button

postbutton=（Button） findViewById（R.id.buttonfb）; 应该是

Button

postbutton=（Button） dialog.findViewById（R.id.buttonfb）;如果按钮在对话框中。

Answer 3

- 我认为postbutton在dialog内，如果是这样，您需要通过以下方式找到它的id......

Button postbutton=(Button)dialog.findViewById(R.id.buttonfb);