这是我的第一个应用程序,我遇到了问题。它点击按钮时很快就崩溃了。应用程序的想法是使用三个文本框中的三个数字进行简单计算,并将结果输出到另一个文本框中。这是我的代码。
package com.example.jeehbs.myfirstapp;
import android.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public void mathIt(View view){
EditText price = (EditText) findViewById(R.id.price);
EditText oz = (EditText) findViewById(R.id.oz);
EditText amount = (EditText) findViewById(R.id.amount);
int p = Integer.parseInt(price.getText().toString());
int o = Integer.parseInt(oz.getText().toString());
int a = Integer.parseInt(amount.getText().toString());
int result = (a*o)/p;
TextView resultView = (TextView) findViewById(R.id.resultView);
resultView.setText(result);
}
}
答案 0 :(得分:3)
setText
采用字符串参数而不是整数try resultView.setText(String.valueOf(result));
。 integer参数是字符串资源R.string.string_name
答案 1 :(得分:0)
您说您将结果放在文本框中,但是将其转换为TextView:
TextView resultView = (TextView) findViewById(R.id.resultView);
请尝试使用EditText吗?