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- public class buscador extends AppCompatActivity {
- ListView lv;
- private DatabaseReference myRef,ref,ref2;
- private FirebaseAuth mAuth;
- private FirebaseAuth.AuthStateListener mAuthListner;
- private String id;
- private FirebaseDatabase mFirebaseDatabase;
- private static final String TAG = "buscador";
- int num=1;
- private ArrayList<String> array2;
- @Override
- protected void onCreate(@Nullable Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.buscador);
- lv=(ListView)findViewById(R.id.cat1);
- EditText search = (EditText)findViewById(R.id.searchfind);
- mAuth=FirebaseAuth.getInstance();
- FirebaseUser user=mAuth.getCurrentUser();
- id=ref.getKey();
- setupFirebaseAuth();
- ref=FirebaseDatabase.getInstance().getReference("Products");
- ref.addValueEventListener(new ValueEventListener() {
- @Override
- public void onDataChange(DataSnapshot dataSnapshot) {
- showData(dataSnapshot);
- }
- @Override
- public void onCancelled(DatabaseError databaseError) {
- }
- });
- }
- public void showData(DataSnapshot dataSnapshot){
- for (DataSnapshot ds : dataSnapshot.getChildren()) {
- Producto info = new Producto();
- info.setName(ds.child(id).getValue(Producto.class).getName());
- Log.d(TAG, "showData:name:" + info.getName());
- ArrayList<String> array=new ArrayList<>();
- array.add(info.getName());
- ArrayAdapter adapter=new ArrayAdapter(this,android.R.layout.simple_list_item_1,array);
- lv.setAdapter(adapter);}
- }
- public class Producto {
- private String image;
- private String name;
- private float price;
- private String descripcion;
- private String catalogo;
- private String id;
- public Producto(String image, String name, float price, String descripcion, String catalogo, String id) {
- this.image = image;
- this.name = name;
- this.price = price;
- this.descripcion = descripcion;
- this.catalogo = catalogo;
- this.id = id;
- }
- public Producto() {
- }
- public String getImage() {
- return image;
- }
- public void setImage(String image) {
- this.image = image;
- }
- public String getName() {
- return name;
- }
- public void setName(String name) {
- this.name = name;
- }
- public float getPrice() {
- return price;
- }
- public void setPrice(float price) {
- this.price = price;
- }
- public String getDescripcion() {
- return descripcion;
- }
- public void setDescripcion(String descripcion) {
- this.descripcion = descripcion;
- }
- public String getCatalogo() {
- return catalogo;
- }
- public void setCatalogo(String catalogo) {
- this.catalogo = catalogo;
- }
- public String getId() {
- return id;
- }
- public void setId(String id) {
- this.id = id;
- }
- }
- Process: com.example.roge.navapp, PID: 32020
- java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.roge.navapp/com.example.roge.navapp.buscador}: java.lang.NullPointerException
- at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2429)
- at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2493)
- at android.app.ActivityThread.access$800(ActivityThread.java:166)
- at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1283)
- at android.os.Handler.dispatchMessage(Handler.java:102)
- at android.os.Looper.loop(Looper.java:136)
- at android.app.ActivityThread.main(ActivityThread.java:5590)
- at java.lang.reflect.Method.invokeNative(Native Method)
- at java.lang.reflect.Method.invoke(Method.java:515)
- at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
- at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
- at dalvik.system.NativeStart.main(Native Method)
- Caused by: java.lang.NullPointerException
- at com.example.roge.navapp.buscador.onCreate(buscador.java:51)
- at android.app.Activity.performCreate(Activity.java:5447)
- at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
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