需要总结总金额并在其他意图/活动中创建订单摘要

Question

xml布局屏幕截图试图计算另一个活动中选定项目的最终数量。需要在另一个活动中创建订单摘要。

尝试引入乘法函数，但还需要硬编码数量值以自动计算最终数量。

public class MainActivity extends AppCompatActivity {
EditText pantqty;
EditText pantrate;
TextView result;
Button SUBMIT;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    pantqty = (EditText) findViewById(R.id.et_pantqty);
    pantrate = (EditText) findViewById(R.id.et_pantrate);
    SUBMIT = (Button) findViewById(R.id.et_submit);
    result = (TextView) findViewById(R.id.et_result);

    SUBMIT.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            int q = Integer.valueOf(pantqty.getText().toString());
            float r = Integer.valueOf(pantrate.getText().toString());
            float amount = q * r;
            result.setText(Float.toString(amount));
        }
    });
}
}

需要在onclicklistener中创建一种方法来计算所选项目的金额。如果其他情况可以在onclicklisterbutton上使用？

感谢您的帮助。

Answer 1

您可以做这样的事情：

public class MainActivity extends AppCompatActivity {
EditText pantqty;
EditText pantrate;
EditText shirtQty;
EditText shirtRate;
TextView result;
Button SUBMIT;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 pantqty = (EditText) findViewById(R.id.et_pantqty);
 pantrate = (EditText) findViewById(R.id.et_pantrate);
 shirtQty = (EditText) findViewById(R.id.shirtqtyId);
 shirtRate = (EditText) findViewById(R.id.shirtRateId);
 SUBMIT = (Button) findViewById(R.id.et_submit);
 result = (TextView) findViewById(R.id.et_result);

 SUBMIT.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View view) {
 calculateSum();
 }
 });
 }
private void calculateSum(){
int q=0;
String pantQty=pantqty.getText().toString().trim();
if(!pantQty.isEmpty() && pantQty!="") {
q=Integer.valueOf(pantQty);
}
float r = Integer.valueOf(pantrate.getText().toString());
int a = Integer.valueOf(shirtQty.getText().toString());
float b = Integer.valueOf(shirtRate.getText().toString());
float amount = (q * r)+(a*b);
result.setText(Float.toString(amount));
 Intent intent=new Intent(this,SecondActivity.class);
 intent.putExtra("total",amount);
 startActivity(intent);
}
    }

在第二个方面，您可以得到总计：

float total=getIntent().getFloatExtra("total",0.0);

Answer 2

 @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    pantqty = (EditText) findViewById(R.id.lo_pantqty);
    shirtqty = (EditText) findViewById(R.id.lo_shirtqty);
    shareesqty = (EditText) findViewById(R.id.lo_shareesqty);
    suitqty = (EditText) findViewById(R.id.lo_suitqty);
    result = (TextView) findViewById(R.id.et_result);
    SUBMIT = (Button) findViewById(R.id.io_enter);
    SUBMIT.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            calculationSum();
        }
    });
}
private void calculationSum() {
    int q = 0;
    String pantQTY = pantqty.getText().toString().trim();
    if (!pantQTY.isEmpty()&&pantQTY!=""){
        q = Integer.valueOf(pantQTY);
    }
  int r = 0;
  String shirtQTY = shirtqty.getText().toString().trim();
  if (!shirtQTY.isEmpty()&&shirtQTY!=""){
      r = Integer.valueOf(shirtQTY);
   }
    int a = 0;
    String suitQTY = suitqty.getText().toString().trim();
    if (!suitQTY.isEmpty()&&suitQTY!=""){
        a = Integer.valueOf(shirtQTY);
    }
   int b = 0;
  String shareesQTY = shareesqty.getText().toString().trim();
   if (!shareesQTY.isEmpty()&&shareesQTY!=""){
        b = Integer.valueOf(shirtQTY);
    }
    int amount = (q*30) + (r*35) + (a*220) + (b*60);
    result.setText(Integer.toString(amount));
}

}