我几乎已经完成了我的应用程序的制作,并且我一直试图解决最后一个问题.我进行了一项活动,以显示使用FirestoreRecyclerAdapter从Firestore获取的数据,并且在模拟器上运行时,它可以完美运行.但是,当我使用MinifyEnabled：true生成签名的APK并将其安装在设备上之后,RecyclerVIEw只会显示空白.当我将MinifyEnabled：false设置为完美时.以下是我的代码
对于TransactionRecycler类
public class TransactionRecycler { private String payment_date; private String status; private String meternumber; public String reference; private String amount_formatted; private Double PurchasedUnits; private Double FreeUnits; private Double Vat; public String ID; private String payment_time; // public String state; private String token; public String address; private String account_@R_419_6889@; public TransactionRecycler(String payment_date, String status, String meternumber, String reference, String ID, String amount_formatted, String payment_time, String token, Double PurchasedUnits, Double FreeUnits, Double Vat, String account_@R_419_6889@, String address){ this.payment_date = payment_date; this.status = status; this.meternumber = meternumber; this.reference = reference; this.amount_formatted = amount_formatted; this.PurchasedUnits = PurchasedUnits; this.Vat = Vat; // this.state = state; this.FreeUnits = FreeUnits; this.ID = ID; this.payment_time = payment_time; this.token = token; this.account_@R_419_6889@ = account_@R_419_6889@; this.address = address; } public TransactionRecycler(){}; public voID setDate(String payment_date){this.payment_date = payment_date;} public voID setID(String ID){this.ID =ID;} // public voID setState(String ID){this.state =state;} public String getPayment_date(){return payment_date;} public String getStatus(){return status;} public String getMeternumber(){return meternumber;} public String getReference(){return reference;} public String getAddress(){return address;} public String getAmount_formatted(){return amount_formatted;} public Double getPurchasedUnits(){return PurchasedUnits;} public Double getFreeUnits(){return FreeUnits;} public Double getVat(){return Vat;} public String getID(){return ID;} // public String getstate(){return state;} public String getPayment_time(){return payment_time;} public String getToken(){return token;} public String getAccount_@R_419_6889@(){return account_@R_419_6889@;}}对于TRANSactionActivity
public class TransactionActivity extends AppCompatActivity { private static final String TAG = "TransactionActivity"; private final static String strUrlID= "https://www.eliminateramp.com?exmen="; private static final int SERVICE_CHARGE = 100; private static final String PLEASE_CHECK_YOUR_METER_NUMBER_AND_TRY_AGAIN = "Please check your meter number and try again"; private static final String CouldN_T_CONNECT_AT_THIS_TIME_PLEASE_TRY_AGAIN = "Couldn't connect at this time, Please try again"; private static final String FAILLED = "failled"; private static final String NOT_FOUND = "NOT FOUND"; private FirebaseAuth mAuth; private String userID; private RecyclerVIEw mTransactionList; protected linearlayoutmanager linearlayoutmanager; public FirestoreRecyclerAdapter adapter; private SlIDingUpPanelLayout mLayout; private NavigationVIEw navigation; private DrawerLayout mDrawerLayout; private ActionbarDrawerToggle mToggle; private static final String SPACE = " "; private static String phone; private button char@R_419_6889@; private TextVIEw emailvIEw; private TextVIEw full@R_419_6889@vIEw; private TextVIEw priceIDrc; private static TextVIEw post_meterno; private static String aamount; public boolean onCreateOptionsMenu(Menu menu){ getMenuInflater().inflate(R.menu.top_menu, menu); return super.onCreateOptionsMenu(menu); } @OverrIDe protected voID onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentVIEw(R.layout.activity_transaction); mTransactionList = findVIEwByID(R.ID.frIEnd_Listinc); mLayout = findVIEwByID(R.ID.slIDing_layout); mAuth = FirebaseAuth.getInstance(); userID = mAuth.getCurrentUser().getUID(); Log.d("Error","The UID is: "+userID); Toolbar mToolbar = findVIEwByID(R.ID.nav_actionbar); setSupportActionbar(mToolbar); mDrawerLayout = findVIEwByID(R.ID.drawerlayout); navigation = findVIEwByID(R.ID.navigationvIEw); mToggle = new ActionbarDrawerToggle(this, mDrawerLayout, R.string.open, R.string.close); VIEw headerVIEw = navigation.getheaderVIEw(0); emailvIEw = headerVIEw.findVIEwByID(R.ID.emailvIEwraw); full@R_419_6889@vIEw = headerVIEw.findVIEwByID(R.ID.full@R_419_6889@vIEwID); char@R_419_6889@ = headerVIEw.findVIEwByID(R.ID.char@R_419_6889@ID); mDrawerLayout.addDrawerListener(mToggle); mToggle.syncState(); getSupportActionbar().setdisplayHomeAsUpEnabled(true); try{ getUserData(); }catch (Exception e){ Log.d(TAG, "Failed to get user Data at this time coz: "+e); } ImageVIEw imgvIEw = findVIEwByID(R.ID.closeID); imgvIEw.setonClickListener(new VIEw.OnClickListener() { @OverrIDe public voID onClick(VIEw v) { mLayout.animate(); mLayout.setPanelState(SlIDingUpPanelLayout.PanelState.ColLAPSED); } }); char@R_419_6889@.setonClickListener(new VIEw.OnClickListener() { @OverrIDe public voID onClick(VIEw v) { startActivity(new Intent(TransactionActivity.this,UpdateActivity.class)); } }); init(); inTrans(); initInstances(); } @OverrIDe public boolean onoptionsItemSelected(MenuItem item) { return mToggle.onoptionsItemSelected(item) || super.onoptionsItemSelected(item); } private voID initInstances() { // getSupportActionbar().setHomebuttonEnabled(true); // getSupportActionbar().setdisplayHomeAsUpEnabled(true); navigation = findVIEwByID(R.ID.navigationvIEw); navigation.setNavigationItemSelectedListener(new NavigationVIEw.OnNavigationItemSelectedListener() { @OverrIDe public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) { int ID = menuItem.getItemID(); switch (ID) { case R.ID.nav_home: //Do some thing here // add navigation drawer item onclick method here Intent intent2 = new Intent(TransactionActivity.this, HomePageActivity.class); startActivity(intent2); break; case R.ID.nav_estimate: mDrawerLayout.closeDrawer(GravityCompat.START); break; //Do some thing here // add navigation drawer item onclick method here case R.ID.nav_Settings: //Do some thing here // add navigation drawer item onclick method here Intent intent3 = new Intent(TransactionActivity.this, HelpActivity.class); startActivity(intent3); break; case R.ID.nav_hc: //Do some thing here // add navigation drawer item onclick method here Intent intent = new Intent(TransactionActivity.this, HelpCenteractivity.class); startActivity(intent); break; } return false; } }); } private voID init(){ linearlayoutmanager = new linearlayoutmanager(getApplicationContext(), linearlayoutmanager.VERTICAL, false); mTransactionList.setLayoutManager(linearlayoutmanager); } private voID inTrans(){ @R_301_5962@ @R_301_5962@ = FirebaseFirestore.getInstance().collection("user-orders").document(userID).collection("successful-orders").orderBy("RequestedOn"); FirestoreRecyclerOptions<TransactionRecycler> response = new FirestoreRecyclerOptions.Builder<TransactionRecycler>() .set@R_301_5962@(@R_301_5962@, TransactionRecycler.class) .build(); adapter = new FirestoreRecyclerAdapter<TransactionRecycler, TransactionRecyclerHolder>(response){ @OverrIDe public TransactionRecyclerHolder onCreateVIEwHolder(VIEwGroup parent, int vIEwType) { VIEw vIEw = LayoutInflater.from(parent.getContext()).inflate(R.layout.transaction_List, parent, false); return new TransactionRecyclerHolder(vIEw); } @OverrIDe public voID one rror(@NonNull FirebaseFirestoreException e) { Log.e("error", e.getMessage()); } @OverrIDe protected voID onBindVIEwHolder(@NonNull TransactionRecyclerHolder holder, int position, @NonNull final TransactionRecycler model) { //progressbar.setVisibility(VIEw.GONE); holder.setDate(model.getPayment_date()); holder.setStatus(model.getStatus()); holder.setReference(model.getID()); holder.setMeterno(model.getMeternumber()); holder.setPrice(model.getAmount_formatted()); mLayout.setFadeOnClickListener(new VIEw.OnClickListener() { @OverrIDe public voID onClick(VIEw v) { mLayout.animate(); mLayout.setPanelState(SlIDingUpPanelLayout.PanelState.ColLAPSED); } }); holder.itemVIEw.setonClickListener(new VIEw.OnClickListener() { @OverrIDe public voID onClick(VIEw v) { mLayout.setPanelHeight(4); mLayout.animate(); // mLayout.setAnchorPoint(2.0f); mLayout.setPanelState(SlIDingUpPanelLayout.PanelState.EXPANDED); priceIDrc = findVIEwByID(R.ID.priceIDsc); TextVIEw dateIDrc = findVIEwByID(R.ID.dateIDsc); TextVIEw referenceIDrc = findVIEwByID(R.ID.refIDsc); TextVIEw statusIDrc = findVIEwByID(R.ID.statusIDsc); TextVIEw meternoIDrc = findVIEwByID(R.ID.meternoIDsc); TextVIEw paymenttimeIDrc = findVIEwByID(R.ID.paymenttimeIDsc); TextVIEw tokenIDrc = findVIEwByID(R.ID.tokenIDsc); TextVIEw creditIDrc = findVIEwByID(R.ID.creditIDsc); TextVIEw freeunitsrc = findVIEwByID(R.ID.freeunitsIDsc); TextVIEw vatrc = findVIEwByID(R.ID.vatIDsc); TextVIEw account@R_419_6889@IDrc = findVIEwByID(R.ID.@R_419_6889@sIDsc); TextVIEw address = findVIEwByID(R.ID.addressIDsc); dateIDrc.setText(model.getPayment_date()); statusIDrc.setText(model.getStatus()); meternoIDrc.setText(model.getMeternumber()); priceIDrc.setText(model.getAmount_formatted()); referenceIDrc.setText(model.getID()); paymenttimeIDrc.setText(model.getPayment_time()); tokenIDrc.setText(model.getToken()); creditIDrc.setText(String.valueOf(model.getPurchasedUnits())); freeunitsrc.setText(String.valueOf(model.getFreeUnits())); vatrc.setText(String.valueOf(model.getVat())); account@R_419_6889@IDrc.setText(model.getAccount_@R_419_6889@()); address.setText(model.getAddress()); } }); } }; adapter.notifyDataSetChanged(); mTransactionList.setAdapter(adapter); } @OverrIDe public voID onStart() { super.onStart(); adapter.startListening(); } @OverrIDe public voID onStop() { super.onStop(); adapter.stopListening(); } public static class TransactionRecyclerHolder extends RecyclerVIEw.VIEwHolder { VIEw mVIEw; TransactionRecyclerHolder(VIEw itemVIEw) { super(itemVIEw); mVIEw = itemVIEw; } public voID setDate(String payment_date) { TextVIEw post_date = mVIEw.findVIEwByID(R.ID.dateID); post_date.setText(payment_date); } public voID setStatus(String status) { TextVIEw post_status = mVIEw.findVIEwByID(R.ID.statusID); post_status.setText(status); } public voID setMeterno(String meterno) { post_meterno = mVIEw.findVIEwByID(R.ID.meternoID); post_meterno.setText(meterno); } public voID setReference(String reference) { TextVIEw post_ref = mVIEw.findVIEwByID(R.ID.refID); post_ref.setText(reference); } public voID setPrice(String price) { TextVIEw post_price = mVIEw.findVIEwByID(R.ID.priceID); post_price.setText(price); aamount=price; } } public voID getUserData() { mAuth= FirebaseAuth.getInstance(); try{ userID = mAuth.getCurrentUser().getUID(); }catch(Exception e){ Log.d(TAG, "Failled somehow"); } Log.d(TAG, "ur uID => "+userID); documentReference mDocRef = FirebaseFirestore.getInstance().collection("users").document(userID); mDocRef.get().addOnCompleteListener(new OnCompleteListener<documentSnapshot>() { @OverrIDe public voID onComplete(@NonNull Task<documentSnapshot> task) { if(task.isSuccessful()){ documentSnapshot doc = task.getResult(); String first@R_419_6889@ = doc.get("first@R_419_6889@").toString(); String last@R_419_6889@ = doc.get("last@R_419_6889@").toString(); phone = doc.get("phone").toString(); String full@R_419_6889@ = first@R_419_6889@+SPACE+last@R_419_6889@; full@R_419_6889@vIEw.setText(full@R_419_6889@); try{ emailvIEw.setText(mAuth.getCurrentUser().getEmail()); }catch(Exception e){ Log.d(TAG,"oops"); } char@R_419_6889@.setText(first@R_419_6889@.substring(0,1)); } } }); } public voID buyAgain(VIEw vIEw){ final Dialog dialog = new Dialog(TransactionActivity.this); dialog.getwindow().setBackgroundDrawable(new colorDrawable(color.transparent)); dialog.setCanceledOntouchOutsIDe(false); dialog.setContentVIEw(R.layout.progressbar); String price = aamount.replaceAll("\D",""); final int amount = Integer.parseInt(price) + SERVICE_CHARGE; final String mn = post_meterno.getText().toString(); final String ml = "amstadam"; final String ref = String.valueOf(Calendar.getInstance().getTimeInMillis()); @Suppresslint("StaticFIEldLeak") AsyncTask<String, String, String> jesget@R_419_6889@s = new AsyncTask<String, String, String>() { @OverrIDe protected String doInBackground(String... params) { String geMt@R_419_6889@; String urlMt@R_419_6889@ = strUrlID+post_meterno.getText().toString().trim(); Log.d(TAG, "The string:" + urlMt@R_419_6889@); try { URL url = new URL(urlMt@R_419_6889@); httpURLConnection con = (httpURLConnection) url.openConnection(); con.setRequestMethod("GET"); con.connect(); BufferedReader bf = new BufferedReader(new inputStreamReader(con.getinputStream())); String value = bf.readline(); Log.d(TAG, "Value of value is: " + value); if(value.equals("not found")){ geMt@R_419_6889@ = "NOT FOUND"; }else{ JsONObject parentJson = new JsONObject(value); String meternumber = parentJson.getString("xmen"); String meter@R_419_6889@ = parentJson.getString("x_@R_419_6889@"); String address = parentJson.getString("address"); geMt@R_419_6889@ = meter@R_419_6889@+"/"+meternumber+"/"+address; } Log.d(TAG, "meter @R_419_6889@ after get is: " + geMt@R_419_6889@); } catch (Exception e) { // Log.d(TAG, "Faiiled coz: "+ e); geMt@R_419_6889@ = "failled"; e.printstacktrace(); } Log.d(TAG, "I dont kNow if this works " + geMt@R_419_6889@); return geMt@R_419_6889@; } @OverrIDe protected voID onPostExecute(String s) { super.onPostExecute(s); Log.d(TAG, "pnPostExecute value: " + s); String @R_419_6889@SubString; String numberSubString; String addressSubString; // date and time creation String stringDate = String.valueOf(DateFormat.getDateTimeInstance()); Date stringTime = Calendar.getInstance().getTime(); SimpleDateFormat curFormater = new SimpleDateFormat("dd/MM/yyyy", Locale.ENGliSH); SimpleDateFormat timeFormat = new SimpleDateFormat("h:mm a", Locale.ENGliSH); Date dateObj = new Date(); Date timeObj = new Date(); try { dateObj = curFormater.parse(stringDate); timeObj = timeFormat.parse(String.valueOf(stringTime)); } catch (ParseException e) { e.printstacktrace(); } SimpleDateFormat postFormater = new SimpleDateFormat("d MMMM yyyy", Locale.ENGliSH); SimpleDateFormat postTimeFormater = new SimpleDateFormat("h:mm a", Locale.ENGliSH); String newDateStr = postFormater.format(dateObj); String newtimeStr = postTimeFormater.format(timeObj); switch (s) { case FAILLED: @R_419_6889@SubString = FAILLED; numberSubString = FAILLED; addressSubString = FAILLED; break; case NOT_FOUND: @R_419_6889@SubString = FAILLED; numberSubString = FAILLED; addressSubString = FAILLED; break; default: String[] split = s.split("/"); @R_419_6889@SubString = split[0]; numberSubString = split[1]; addressSubString = split[2]; break; } switch (s) { //Todo: Change toast message to reflect Json in future case FAILLED: //Todo: after creating layout, go back to prevIoUs layout and display toast message Toast.makeText(TransactionActivity.this, CouldN_T_CONNECT_AT_THIS_TIME_PLEASE_TRY_AGAIN, Toast.LENGTH_SHORT).show(); dialog.dismiss(); break; case NOT_FOUND: Toast.makeText(TransactionActivity.this, PLEASE_CHECK_YOUR_METER_NUMBER_AND_TRY_AGAIN, Toast.LENGTH_SHORT).show(); dialog.dismiss(); break; default: Intent meterIntent = new Intent(TransactionActivity.this, MeterNumActivity.class); meterIntent.putExtra("meternum", mn); meterIntent.putExtra("meterprice", amount); meterIntent.putExtra("meterlocation", ml); meterIntent.putExtra("reference", ref); meterIntent.putExtra("meteracct@R_419_6889@", @R_419_6889@SubString); meterIntent.putExtra("meteracctnumber", numberSubString); meterIntent.putExtra("meteracctaddress", addressSubString); meterIntent.putExtra("uuID", userID); meterIntent.putExtra("date_created", newDateStr); meterIntent.putExtra("time_created", newtimeStr); meterIntent.putExtra("phone", phone); meterIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_top); startActivity(meterIntent); break; } } }; dialog.show(); jesget@R_419_6889@s.execute(); } @OverrIDe public voID onBackpressed() { Intent i= new Intent(this,HomePageActivity.class); startActivity(i); finish(); }}我的摇篮是
androID { compileSdkVersion 26 defaultConfig { applicationID "com.example.menofx.xmen" minSdkVersion 21 targetSdkVersion 26 versionCode 1 version@R_419_6889@ "1.0" testInstrumentationRunner "androID.support.test.runner.AndroIDJUnitRunner" } buildTypes { release { MinifyEnabled true proguardfiles getDefaultProguardfile('proguard-androID.txt'), 'proguard-rules.pro' } }}dependencIEs { implementation filetree(include: ['*.jar'], dir: 'libs') implementation 'com.androID.support:appcompat-v7:26.1.0' implementation 'com.androID.support:cardvIEw-v7:26.1.0' implementation 'com.firebaseui:firebase-ui-firestore:3.1.3' implementation 'com.firebaseui:firebase-ui-auth:3.1.3' implementation 'com.firebaseui:firebase-ui-database:3.1.3' implementation "com.Google.firebase:firebase-firestore:11.8.0" implementation "com.androID.support:recyclervIEw-v7:26.1.0" implementation "com.Google.androID.gms:play-services-auth:11.8.0" implementation 'co.paystack.androID:paystack:3.0.9' implementation 'br.com.simplepass:loading-button-androID:1.8.4' implementation 'com.github.faruktoptas:FancyShowCaseVIEw:1.0.0' implementation 'com.sothree.slIDinguppanel:library:3.4.0' implementation 'com.androID.support:design:26.1.0' implementation 'com.androID.support:support-v4:26.1.0' implementation 'com.androID.support:support-vector-drawable:26.1.0' implementation 'com.androID.support.constraint:constraint-layout:1.0.2' testImplementation 'junit:junit:4.12' androIDTestImplementation 'com.androID.support.test:runner:0.5' androIDTestImplementation 'com.androID.support.test.espresso:espresso-core:2.2.2' implementation project(':library')}apply plugin: 'com.Google.gms.Google-services'如果需要,我的保全规则是空的.这是我第一次使用Firebase UI,所以我什至不知道如何诊断问题.谢谢您的帮助.
解决方法:
您需要将POJO(模型类)放在一个程序包中,然后将该程序包添加到proguard规则中,或者可以将所有这些程序包添加到这些类所在的位置(我个人只是为它们使用一个程序包). Firebase在序列化和反序列化过程中使用反射,因此它不能使用混淆的类名.将所有这些文件放入一个软件包后,请将此规则添加到您的proguard文件中以防止混淆：
-keep class package.to.pojos.** { *; }如果您希望将它们保留在原处,则只需为每个模型类添加一条规则,并使用-keep class关键字,后跟该类的完整路径(逐包).
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