當(dāng)我單擊列表行項(xiàng)目然后在行imageview中顯示圖像時(shí)，如何使用像Android中的iphone這樣的刻度線(xiàn)選擇行項(xiàng)目？if(getItem(position)!=null){img.setvisibilty(View.Visible);} else{System.out.println("imagenull");}我使用此功能，但圖像僅顯示在最后一行。請(qǐng)幫助我如何使用刻度線(xiàn)圖像選擇項(xiàng)目。public class DistanceArrayAdapter extends ArrayAdapter<Constant>{public static String category,state,miles;public ImageView img;private Context context;private int current = -1;ArrayList<Constant> dataObject;public DistanceArrayAdapter(Context context, int textViewResourceId,ArrayList<Constant> dataObject) {super(context, textViewResourceId, dataObject);this.context=context;}@Overridepublic View getView(final int position, View convertView, ViewGroup parent) {View rowView=convertView;if(rowView==null){LayoutInflater inflater = (LayoutInflater) context .getSystemService(Context.LAYOUT_INFLATER_SERVICE);rowView = inflater.inflate(R.layout.category_row, parent, false);} //TextView textView = (TextView) rowView.findViewById(R.id.text1);TextView textView1 = (TextView) rowView.findViewById(R.id.text2); //textView.setText(""+getItem(position).id);textView1.setText(""+getItem(position).caption);img=(ImageView)rowView.findViewById(R.id.img);img.setVisibility(View.GONE);if(position%2==1){rowView.setBackgroundResource(R.color.even_list);}else { rowView.setBackgroundResource(R.color.odd_list); }rowView.setOnClickListener（new OnClickListener（）{ @Override public void onClick(View v) { if(img.getVisibility()==View.GONE) { img.setVisibility(View.VISIBLE); System.out.println("1"); }if(img.getVisibility()==View.VISIBLE){img.setVisibility(View.GONE);System.out.println("12");}miles=getItem(position).caption;System.out.println("miles"+miles);}});return rowView;}}
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桃花長(zhǎng)相依
TA貢獻(xiàn)1860條經(jīng)驗(yàn) 獲得超8個(gè)贊
在ListView上設(shè)置選擇模式
//if using ListActivity or ListFragment
getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
//or
myListView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
//myListView is reference to your ListView
千萬(wàn)里不及你
TA貢獻(xiàn)1784條經(jīng)驗(yàn) 獲得超9個(gè)贊
我使用數(shù)組適配器為具有復(fù)選框的列表創(chuàng)建了一個(gè)示例示例。
在Android中使用ArrayAdatpter使用CheckBox實(shí)現(xiàn)ListView
您也可以找到示例代碼。
這將被輸出
這是我的代碼片段
我有一個(gè)具有列表視圖的活動(dòng)
public class MainActivity extends Activity {
private ListView mainListView = null;
private Planet[] planets = null;
private ArrayAdapter<Planet> listAdapter = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mainListView = (ListView) findViewById(R.id.mainListView);
// When item is tapped, toggle checked properties of CheckBox and
// Planet.
mainListView
.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View item,
int position, long id) {
Planet planet = listAdapter.getItem(position);
planet.toggleChecked();
PlanetViewHolder viewHolder = (PlanetViewHolder) item
.getTag();
viewHolder.getCheckBox().setChecked(planet.isChecked());
}
});
// Create and populate planets.
planets = (Planet[]) getLastNonConfigurationInstance();
if (planets == null) {
planets = new Planet[] { new Planet("Mercury"),
new Planet("Venus"), new Planet("Earth"),
new Planet("Mars"), new Planet("Jupiter"),
new Planet("Saturn"), new Planet("Uranus"),
new Planet("Neptune"), new Planet("Ceres"),
new Planet("Pluto"), new Planet("Haumea"),
new Planet("Makemake"), new Planet("Eris") };
}
ArrayList<Planet> planetList = new ArrayList<Planet>();
planetList.addAll(Arrays.asList(planets));
// Set our custom array adapter as the ListView's adapter.
listAdapter = new PlanetArrayAdapter(this, planetList);
mainListView.setAdapter(listAdapter);
}
public Object onRetainNonConfigurationInstance() {
return planets;
}
}
這是我正在處理復(fù)選框內(nèi)容的“自定義陣列適配器”
public class PlanetArrayAdapter extends ArrayAdapter<Planet> {
private LayoutInflater inflater;
public PlanetArrayAdapter(Context context, List<Planet> planetList) {
super(context, R.layout.simplerow, R.id.rowTextView, planetList);
//Cache the LayoutInflate to avoid asking for a new one each time.
inflater = LayoutInflater.from(context);
}
@Override
public View getView(int position, View convertView, ViewGroup parent){
Planet planet = (Planet) this.getItem(position);
CheckBox checkBox;
TextView textView;
// Create a new row view
if (convertView == null) {
convertView = inflater.inflate(R.layout.simplerow, null);
textView = (TextView) convertView.findViewById(R.id.rowTextView);
checkBox = (CheckBox) convertView.findViewById(R.id.CheckBox01);
convertView.setTag(new PlanetViewHolder(textView, checkBox));
// If CheckBox is toggled, update the planet it is tagged with.
checkBox.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
CheckBox cb = (CheckBox) v;
Planet planet = (Planet) cb.getTag();
planet.setChecked(cb.isChecked());
}
});
}
// Re-use existing row view
else {
PlanetViewHolder viewHolder = (PlanetViewHolder) convertView
.getTag();
checkBox = viewHolder.getCheckBox();
textView = viewHolder.getTextView();
}
checkBox.setTag(planet);
// Display planet data
checkBox.setChecked(planet.isChecked());
textView.setText(planet.getName());
return convertView;
}
}
請(qǐng)！讓我知道您是否有任何麻煩。
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