我已经完成了小费计算器应用,但是当我运行它时,名称为MainActivity
,我不知道如何更改它,我尝试编辑strings.xml
但是当我运行应用时我收到错误,我不知道还有什么可以尝试,我可以做些什么来改变它以便它出现在模拟器上
在strings.xml上......
名:title_activity_main
值:MainActivity
这里也是我的java代码,我必须在这里改变一下吗?
package tip.calculator;
import android.os.Bundle;
import android.app.Activity;
import android.view.View.OnClickListener;
import android.widget.EditText;
import android.widget.TextView;
import android.view.View;
import android.widget.Button;
import java.text.DecimalFormat;
public class TipCalculator extends Activity
{
private EditText myEditField;
private EditText myEditField2;
private Button enter;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myEditField2 = (EditText) findViewById(R.id.billText);
myEditField = (EditText) findViewById(R.id.percentText);
enter = (Button)findViewById(R.id.button1);
enter.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
TextView textView;
textView = (TextView) findViewById(R.id.textView1);
final EditText myEditField = (EditText) findViewById(R.id.percentText);
final EditText myEditField2 = (EditText) findViewById(R.id.billText);
float percentage;
float percentageInp;
float billAmount;
double output;
String output1;
percentageInp = Float.parseFloat(myEditField.getText().toString());
billAmount = Float.parseFloat(myEditField2.getText().toString());
percentage = ((float)percentageInp /100);
output = (double)(billAmount * percentage);
double result = output * 100;
result = Math.round(result);
result = result / 100;
output1 = Double.toString(result);
textView.setText(output1);
}
});
}
}
manifest.xml ...
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="tip.calculator"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="13"
android:targetSdkVersion="15" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" android:debuggable="true">
<activity
android:name=".TipCalculator"
android:label="@string/title_activity_main" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
这是我的strings.xml
<resources>
<string name="app_name">Tip Calculator</string>
<string name="hello_world">Hello world!</string>
<string name="menu_settings">Settings</string>
<string name="title_activity_main">MainActivity</string>
</resources>
答案 0 :(得分:4)
更改标签
android:label =“小费计算器”
或更改您的strings.xml
<string name="app_name">Tip Calculator</string>
<string name="hello_world">Hello world!</string>
<string name="menu_settings">Settings</string>
<string name="title_activity_main">Tip Calculator</string>
答案 1 :(得分:3)
这是因为android不允许app_name和主要活动名称使用两个不同的标签。但是如果你想同时使用两个不同的标签,你可以按照以下步骤完成它;
应用程序菜单上显示的应用程序名称
<application> android:lable = "@string/app_name" </application>
启动活动时的不同标签;
在主要活动的onCreate()方法中放置;
this.setTitle("Your Title for the Activity");
答案 2 :(得分:0)
这有时只是eclipse中的错误,关闭eclipse然后清理你的项目它应该没问题