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Buku Ini Koding!
Baru!
Buku ini akan jadi teman perjalanan kamu belajar sampai dapat kerjaan di dunia programming!
Masalah pada log.e yang mengakibatkan intent tidak dapat di buka pada aplikasi
tidak paham cara memperbaiki masalah di android studio, pada bagian log.e("SECOND ACTIVITY", name);
public class DrinkDetailActivity extends AppCompatActivity {
private int item = 0;
private int price = 0;
TextView sumTextView;
TextView priceTotalTextView;
TextView txtName, txtQuantity, txtPrice;
Button btnAdd, btnCart;
public static SQLiteHelper sqLiteHelper;
@Override
protected void onCreate (Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_food_detail);
init();
sqLiteHelper = new SQLiteHelper(this, "DrinDB.sqlite", null, 1);
sqLiteHelper.queryData("CREATE TABLE IF NOT EXISTS CART(ID INTEGER PRIMARY KEY AUTOINCREMENT, name VARCHAR, " +
"quantity INTEGER, price INTEGER)");
btnAdd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (item < 1) {
Toast.makeText(DrinkDetailActivity.this, "Maaf Pesanan Minimal 1 cup", Toast.LENGTH_SHORT).show();
return;
}
try {
Log.i("TXT PRICE", txtName.getText().toString());
sqLiteHelper.insertData(txtName.getText().toString().trim(),
txtQuantity.getText().toString().trim(),
txtPrice.getText().toString().trim());
Toast.makeText(getApplicationContext(), "Masuk Keranjang!", Toast.LENGTH_SHORT).show();
txtQuantity.setText("0");
} catch (Exception e) {
e.printStackTrace();
}
}
});
btnCart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(DrinkDetailActivity.this, CartListActivity.class);
startActivity(intent);
}
});
String name = getIntent().getStringExtra("name");
String type = getIntent().getStringExtra("type");
int image;
image = getIntent().getIntExtra("image", -1);
price = getIntent().getIntExtra("price", -1);
Log.e("SECOND ACTIVITY", name);
TextView nameTV = (TextView) findViewById(R.id.drink_name_text_view);
nameTV.setText(name);
TextView typeTV = (TextView) findViewById(R.id.type);
typeTV.setText(type);
ImageView imageV = (ImageView) findViewById(R.id.drink_image);
imageV.setImageResource(image);
imageV.setVisibility(View.VISIBLE);
TextView priceTV = (TextView) findViewById(R.id.harga_detail_text_view);
priceTV.setText(Integer.toString(price));
sumTextView = (TextView) findViewById(R.id.sum_text_view);
priceTotalTextView =(TextView) findViewById(R.id.harga_total_text_view);
Button incrementBtn = (Button) findViewById(R.id.increment_btn);
incrementBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
increment();
}
});
Button decrementBtn = (Button) findViewById(R.id.decrement_btn);
decrementBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
decrement();
}
});
}
private void init(){
txtName = findViewById(R.id.drink_name_text_view);
txtQuantity = findViewById(R.id.sum_text_view);
txtPrice = findViewById(R.id.harga_total_text_view);
btnAdd = findViewById(R.id.pesan_btn);
btnCart = findViewById(R.id.cart_btn);
}
private void increment(){
item++;
sumTextView.setText(Integer.toString(item));
priceTotalTextView.setText(Integer.toString(sumOfProduct(price)));
}
private void decrement(){
if(item<1){
Toast.makeText(this, "maaf Anda tidak dapat memesan kurang dari 1", Toast.LENGTH_SHORT).show();
return;
}
item =item-1;
sumTextView.setText(Integer.toString(item));
priceTotalTextView.setText(Integer.toString(sumOfProduct(price)));
}
private int sumOfProduct(int price){
return item * price;
}
}
dan ini error messagenya at com.dicoding.picodiploma.kedaikopi.Models.DrinkDetailActivity.onCreate(DrinkDetailActivity.java:69)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2760)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2821)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1541)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:181)
at android.app.ActivityThread.main(ActivityThread.java:6295)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:793)
Caused by: java.lang.NullPointerException: println needs a message
at android.util.Log.println_native(Native Method)
at android.util.Log.e(Log.java:236)
at com.dicoding.picodiploma.kedaikopi.Models.DrinkDetailActivity.onCreate(DrinkDetailActivity.java:69)
at android.app.Activity.performCreate(Activity.java:6834)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1125)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2713)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2821)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1541)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:181)
at android.app.ActivityThread.main(ActivityThread.java:6295)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:793)
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2 Jawaban:
coba dicek mungkin nama dari string extra-nya typo
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<pre> Caused by: java.lang.NullPointerException: println needs a message </pre>
untuk ada yg null, nilainya bro.
DrinkDetailActivity baris 69 apa codenya?
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