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我的Android應用程序需要一個功能，有一個按鈕需要顯示和隱藏基於一個TextView。這是我的代碼，並進一步解釋。Android studio從條件隱藏和顯示按鈕
public class currentCar extends Fragment implements AsyncResponse, AdapterView.OnItemClickListener {
final String TAG = this.getClass().getName();
private ArrayList<AcceptCars> carList;
private ListView lvCurrent;
private FunDapter<AcceptCars> adapter;
SharedPreferences pref;
public currentCar() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View v = inflater.inflate(R.layout.fragment_current_car, container, false);
ImageLoader.getInstance().init(UILConfig.config(getActivity()));
lvCurrent = (ListView) v.findViewById(R.id.lvCurrent);
pref = getActivity().getSharedPreferences("Login.conf", Context.MODE_PRIVATE);
Log.d(TAG, pref.getString("username",""));
PostResponseAsyncTask taskRead = new PostResponseAsyncTask(getActivity(), this);
taskRead.execute("http://carkila.esy.es/carkila/current.php?acceptCarOwner="+pref.getString("username",""));
return v;
}
@Override
public void processFinish(String s) {
carList = new JsonConverter<AcceptCars>().toArrayList(s, AcceptCars.class);
BindDictionary<AcceptCars> dict = new BindDictionary<AcceptCars>();
dict.addDynamicImageField(R.id.ivImg1, new StringExtractor<AcceptCars>() {
@Override
public String getStringValue(AcceptCars item, int position) {
return item.acceptImage;
}
}, new DynamicImageLoader() {
@Override
public void loadImage(String url, ImageView view) {
ImageLoader.getInstance().displayImage(url, view);
}
});
dict.addStringField(R.id.tvCarModel, new StringExtractor<AcceptCars>() {
@Override
public String getStringValue(AcceptCars item, int position) {
return "Car Model: " + item.acceptModel;
}
});
dict.addStringField(R.id.tvResDate, new StringExtractor<AcceptCars>() {
@Override
public String getStringValue(AcceptCars item, int position) {
return "Date: " + item.acceptDate;
}
});
dict.addStringField(R.id.tvResTime, new StringExtractor<AcceptCars>() {
@Override
public String getStringValue(AcceptCars item, int position) {
return "Time: " + item.acceptTime;
}
});
dict.addStringField(R.id.tvResLocation, new StringExtractor<AcceptCars>() {
@Override
public String getStringValue(AcceptCars item, int position) {
return "Location: " + item.acceptResLocation;
}
});
dict.addStringField(R.id.tvCarType, new StringExtractor<AcceptCars>() {
@Override
public String getStringValue(AcceptCars item, int position) {
return "Car Type: " + item.acceptType;
}
});
dict.addStringField(R.id.tvCapacity, new StringExtractor<AcceptCars>() {
@Override
public String getStringValue(AcceptCars item, int position) {
return "Capacity: " + item.acceptCapacity;
}
});
dict.addStringField(R.id.tvFuelType, new StringExtractor<AcceptCars>() {
@Override
public String getStringValue(AcceptCars item, int position) {
return "Fuel Type: " + item.acceptFuelType;
}
});
dict.addStringField(R.id.tvPlateNumber, new StringExtractor<AcceptCars>() {
@Override
public String getStringValue(AcceptCars item, int position) {
return "Plate Number: " + item.acceptPlateNumber;
}
});
dict.addStringField(R.id.tvPoster, new StringExtractor<AcceptCars>() {
@Override
public String getStringValue(AcceptCars item, int position) {
return "Posted by : " + item.acceptCarOwner;
}
});
dict.addStringField(R.id.tvRenter, new StringExtractor<AcceptCars>() {
@Override
public String getStringValue(AcceptCars item, int position) {
return "Rented by: "+ item.renters;
}
});
dict.addStringField(R.id.tvDestination, new StringExtractor<AcceptCars>() {
@Override
public String getStringValue(AcceptCars item, int position) {
return "Destination: " + item.acceptDestination;
}
});
dict.addStringField(R.id.tvResPrice, new StringExtractor<AcceptCars>() {
@Override
public String getStringValue(AcceptCars item, int position) {
return "Destination: " + item.acceptPrice;
}
});
dict.addStringField(R.id.tvresID, new StringExtractor<AcceptCars>() {
@Override
public String getStringValue(AcceptCars item, int position) {
return ""+ item.acceptedID;
}
});
dict.addStringField(R.id.tvstatus, new StringExtractor<AcceptCars>() {
@Override
public String getStringValue(AcceptCars item, int position) {
return "Status: "+ item.payment;
}
});
adapter = new FunDapter<>(
getActivity(), carList, R.layout.layout_rented, dict);
lvCurrent.setAdapter(adapter);
lvCurrent.setOnItemClickListener(this);
}
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
AcceptCars selectedCars = carList.get(i);
Intent in = new Intent(getActivity(), ownerStatus.class);
in.putExtra("cars", selectedCars);
startActivity(in);
}
}
在此listView的item.payment開始是 「無償」，它會去ownerStatus.class
OwnerStatus.class
public class ownerStatus extends AppCompatActivity {
TextView tvStatus, tvPaymentStatus, tvresID, tvCarModel, tvCarType, tvCapacity, tvFuelType, tvPlateNumber, tvResDate, tvResTime, tvResLocation, tvPoster, tvRenter, tvDestination, tvPrice;
ImageView ivImage;
Button btnPaid;
Button btnDone;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_owner_status);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
onButtonClick();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
final AcceptCars Cars = (AcceptCars) getIntent().getSerializableExtra("cars");
ImageLoader.getInstance().init(UILConfig.config(ownerStatus.this));
tvCarModel = (TextView) findViewById(R.id.tvCarModel);
tvCarType = (TextView) findViewById(R.id.tvCarType);
tvCapacity = (TextView) findViewById(R.id.tvCapacity);
tvFuelType = (TextView) findViewById(R.id.tvFuelType);
tvPoster = (TextView) findViewById(R.id.tvPoster);
tvPlateNumber = (TextView) findViewById(R.id.tvPlateNumber);
tvResDate = (TextView) findViewById(R.id.tvResDate);
tvResTime = (TextView) findViewById(R.id.tvResTime);
tvResLocation = (TextView) findViewById(R.id.tvResLocation);
tvPrice = (TextView) findViewById(R.id.tvPrice);
tvDestination = (TextView) findViewById(R.id.tvDestination);
tvRenter = (TextView) findViewById(R.id.tvRenter);
tvresID = (TextView) findViewById(R.id.tvresID);
tvPaymentStatus = (TextView) findViewById(R.id.tvPaymentStatus);
tvStatus = (TextView) findViewById(R.id.tvStatus);
ivImage = (ImageView) findViewById(R.id.ivImg1);
if (Cars != null) {
tvresID.setText("" + Cars.acceptedID);
tvCarModel.setText(Cars.acceptModel);
tvCarType.setText(Cars.acceptType);
tvCapacity.setText(Cars.acceptCapacity);
tvFuelType.setText(Cars.acceptFuelType);
tvPlateNumber.setText(Cars.acceptPlateNumber);
tvResDate.setText(Cars.acceptDate);
tvResTime.setText(Cars.acceptTime);
tvResLocation.setText(Cars.acceptResLocation);
tvPoster.setText(Cars.acceptCarOwner);
tvRenter.setText(Cars.renters);
tvDestination.setText(Cars.acceptDestination);
tvPrice.setText(Cars.acceptPrice);
tvPaymentStatus.setText(Cars.payment);
tvStatus.setText(Cars.payment);
ImageLoader.getInstance().displayImage(Cars.acceptImage, ivImage);
}
}
public void onButtonClick() {
btnPaid = (Button) findViewById(R.id.btnPaid);
btnPaid.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
AlertDialog.Builder a_paid = new AlertDialog.Builder(ownerStatus.this);
a_paid.setMessage("Does the renter paid the transaction?")
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
HashMap postData = new HashMap();
postData.put("acceptID", tvresID.getText().toString());
postData.put("payment", "paid");
PostResponseAsyncTask taskPaid = new PostResponseAsyncTask(ownerStatus.this, postData, false, new AsyncResponse() {
@Override
public void processFinish(String s) {
if (s.contains("success")) {
Toast.makeText(ownerStatus.this, "renter is paid", Toast.LENGTH_SHORT).show();
Intent in = new Intent(ownerStatus.this, OwnerTabs.class);
startActivity(in);
finish();
} else {
Toast.makeText(getApplicationContext(), "Failed. Zzzz ☻", Toast.LENGTH_LONG).show();
}
}
});
taskPaid.execute("http://carkila.esy.es/carkila/paid.php");
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.cancel();
}
});
AlertDialog alert = a_paid.create();
alert.setTitle("Payment");
alert.show();
}
});
//===================================================================================//
btnDone = (Button) findViewById(R.id.btnDone);
btnDone.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
AlertDialog.Builder a_done = new AlertDialog.Builder(ownerStatus.this);
a_done.setMessage("Is the rent is done?")
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
HashMap postData2 = new HashMap();
postData2.put("acceptID", tvresID.getText().toString());
postData2.put("status", "done");
PostResponseAsyncTask task1 = new PostResponseAsyncTask(ownerStatus.this, postData2, new AsyncResponse() {
@Override
public void processFinish(String s) {
if (s.contains("success")) {
Toast.makeText(ownerStatus.this, "renter is paid", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getApplicationContext(), "Failed. Zzzz ☻", Toast.LENGTH_LONG).show();
}
}
});
task1.execute("http://carkila.esy.es/carkila/done.php");
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.cancel();
}
});
AlertDialog alert = a_done.create();
alert.setTitle("Done");
alert.show();
}
});
}
}
而就在這裏。當Cars.payment未付時，btnPaid將顯示並隱藏btnDone，但當Cars.payment支付時，btnPaid將隱藏，btnDone現在隱藏。 希望你明白我是如何解釋和幫助我解決問題的。謝謝主席先生:)
你可以的onCreate做到這一點很容易（）。 –
是你的問題'我如何隱藏一個按鈕'？ – brandall
@brandall - 我可以從xml中隱藏一個按鈕，但是我無法做到這一點，我在我的問題上闡述了先生的問題。 –