我的目标是在自定义列表视图中显示已安装应用程序的列表 （活动内）没有复选框，而我想通过所有 检查一项活动到另一项活动的项目。我应该如何通过它们？ 如何通过选择提示项（ImageView和TextView） 带有按钮的新Activity中的listViewCheckbox。并申请 您可以从新活动中打开它 请帮助我。对不起，这是我第一次输入错误 存货不足
这是我的代码：
class AppInfo
import android.graphics.drawable.Drawable;
import android.os.Parcel;
import android.os.Parcelable;
import java.io.Serializable;
class AppInfo implements Parcelable {
Drawable icon;
public String applicationName;
Boolean Selected;
public AppInfo(){
super();
}
public AppInfo(Drawable icon, String applicationName){
super();
this.icon = icon;
this.applicationName = applicationName;
}
protected AppInfo(Parcel in) {
applicationName = in.readString();
byte tmpSelected = in.readByte();
Selected = tmpSelected == 0 ? null : tmpSelected == 1;
}
public static final Creator<AppInfo> CREATOR = new Creator<AppInfo>() {
@Override
public AppInfo createFromParcel(Parcel in) {
return new AppInfo(in);
}
@Override
public AppInfo[] newArray(int size) {
return new AppInfo[size];
}
};
public Drawable getIcon() {
return icon;
}
public void setIcon(Drawable icon) {
this.icon = icon;
}
public String getApplicationName() {
return applicationName;
}
public void setApplicationName(String applicationName) {
this.applicationName = applicationName;
}
public Boolean getSelected() {
return Selected;
}
public void setSelected(Boolean selected) {
Selected = selected;
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(applicationName);
dest.writeByte((byte) (Selected == null ? 0 : Selected ? 1 :
2));
}
}
这里是我的类适配器：
public class AppInfoAdapter extends ArrayAdapter<AppInfo>
implements
CompoundButton.OnCheckedChangeListener
{
SparseBooleanArray mCheckStates;
AppInfo appinfo;
Context context;
int layoutResourceId;
AppInfo data[] = null;
public AppInfoAdapter(Context context, int layoutResourceId,
AppInfo[]data)
{
super(context,layoutResourceId,data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
mCheckStates = new SparseBooleanArray(data.length);
}
@Override
public long getItemId(int position) {
return position;
}
@Nullable
@Override
public AppInfo getItem(int position) {
return super.getItem(position);
}
@Override
public int getCount() {
return data.length;
}
@Override
public View getView(final int position, View convertView, ViewGroup
parent){
View row = convertView;
AppInfoHolder holder= null;
if (row == null){
LayoutInflater inflater =
((Activity)context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new AppInfoHolder();
holder.imgIcon = (ImageView)
row.findViewById(R.id.imageView1);
holder.txtTitle = (TextView)
row.findViewById(R.id.textView1);
holder.chkSelect = (CheckBox)
row.findViewById(R.id.checkBox1);
row.setTag(holder);
}
else{
holder = (AppInfoHolder)row.getTag();
}
appinfo = data[position];
holder.txtTitle.setText(appinfo.applicationName);
holder.imgIcon.setImageDrawable(appinfo.icon);
holder.chkSelect.getText();
holder.chkSelect.setTag(position);//done position sue chaq raw
holder.chkSelect.getTag();
holder.chkSelect.setChecked(mCheckStates.get(position, false));
holder.chkSelect.setOnCheckedChangeListener(this);
return row;
}
public boolean isChecked(int position) {
return mCheckStates.get(position, false);
}
public void setChecked(int position, boolean isChecked) {
mCheckStates.put(position, isChecked);
}
public void toggle(int position) {
setChecked(position, !isChecked(position));
}
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
mCheckStates.put((Integer) buttonView.getTag(), isChecked);
}
}
Class Main Activity按钮从新活动发送以下内容：
Button Send = (Button) findViewById(R.id.btnsend);
Send.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
SparseBooleanArray checked =
listApplication.getCheckedItemPositions();
ArrayList<AppInfo> selectedItems = new ArrayList<AppInfo>();
for (int j = 0; j < adapter.mCheckStates.size(); j++) {
if (adapter.mCheckStates.get(j) == true) {
selectedItems.add(adapter.getItem(j));
}
AppInfo[] outputStrArr = new AppInfo[selectedItems.size()];
for (int i = 0; i < selectedItems.size(); i++) {
outputStrArr[i] = selectedItems.get(i);
}
Intent intent = new Intent(getApplicationContext(),
NextActivity.class);
intent.putExtra("list",output);
startActivity(intent);
}});
ApplicationInfo applicationInfo = getApplicationInfo();
final PackageManager pm = getPackageManager();
final List<PackageInfo> pInfo = new ArrayList<PackageInfo>();
pInfo.addAll(pm.getInstalledPackages(0));
app_info = new AppInfo[pInfo.size()];
int counter = 0;
for (PackageInfo item : pInfo) {
try {
applicationInfo =
pm.getApplicationInfo(item.packageName, 1);
app_info[counter] = new
AppInfo(pm.getApplicationIcon(applicationInfo),
String.valueOf(pm.getApplicationLabel(applicationInfo)));
System.out.println(counter);
} catch (Exception e) {
System.out.println(e.getMessage());
}
counter++;
}
adapter = new AppInfoAdapter(this,
R.layout.installed_app_list, app_info);
listApplication.setAdapter(adapter);
}}
下一个活动的结束语此代码： 公共类NextActivity扩展了AppCompatActivity {
Context context;
Bundle pInfo ;
AppInfo[] outputStrArr;
ArrayList<AppInfo> select;
@SuppressLint("WrongConstant")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_next);
ListView lv=findViewById(R.id.lv);
AppInfo[] result = (AppInfo[])
getIntent().getParcelableArrayExtra("list");
listadaptor = new AppInfoAdapter(NextActivity.this,
R.layout.row, result);
lv.setAdapter(listadaptor);}}
答案 0 :(得分：0)