一个简单的Android应用程序来计算提示，我无法弄清楚这个错误。 java代码没有错误，xml有几个警告。生病了，但是当我运行它时，应用程序立即退出并说“应用程序tipConverter（process.com.example.tipconverter）已意外停止。请再试一次。”而且我不知道为什么。
这是xml：
<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout
android:id="@+id/widget0"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Tip Calculator"/>
<TextView
android:id="@+id/widget28"
android:layout_width="99dp"
android:layout_height="17dp"
android:text="Amount of Bill"
android:layout_x="40dp"
android:layout_y="32dp"/>
<TextView
android:id="@+id/widget29"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Percentage to Tip"
android:layout_x="40dp"
android:layout_y="82dp"/>
<TextView
android:id="@+id/widget30"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Number of People"
android:layout_x="40dp"
android:layout_y="132dp"/>
<TextView
android:id="@+id/widget31"
android:layout_width="wrap_content"
android:layout_height="18dp"
android:text="Tip Amout"
android:layout_x="40dp"
android:layout_y="262dp"/>
<TextView
android:id="@+id/widget32"
android:layout_width="wrap_content"
android:layout_height="18dp"
android:text="Total Per Person"
android:layout_x="40dp"
android:layout_y="352dp"/>
<TextView
android:id="@+id/widget33"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Total To Pay"
android:layout_x="40dp"
android:layout_y="302dp"/>
<Button
android:id="@+id/btncalculate"
android:layout_width="87dp"
android:layout_height="wrap_content"
android:text="Calculate"
android:layout_x="40dp"
android:layout_y="182dp"/>
<Button
android:id="@+id/btnreset"
android:layout_width="86dp"
android:layout_height="wrap_content"
android:text="Reset"
android:layout_x="140dp"
android:layout_y="182dp"/>
<EditText
android:id="@+id/txtbillamount"
android:layout_width="wrap_content"
android:layout_height="35dp"
android:text="100"
android:textSize="18sp"
android:layout_x="200dp"
android:layout_y="22dp"/>
<EditText
android:id="@+id/txtpercentage"
android:layout_width="51dp"
android:layout_height="36dp"
android:text="10"
android:textSize="18sp"
android:layout_x="200dp"
android:layout_y="72dp"/>
<EditText
android:id="@+id/txtpeople"
android:layout_width="wrap_content"
android:layout_height="39dp"
android:text="1 "
android:textSize="18sp"
android:layout_x="200dp"
android:layout_y="122dp"/>
<TextView
android:id="@+id/txttipamount"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:layout_x="200dp"
android:layout_y="262dp"/>
<TextView
android:id="@+id/txttotal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:layout_x="200dp"
android:layout_y="302dp"/>
<TextView
android:id="@+id/txtperperson"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:layout_x="200dp"
android:layout_y="352dp"/>
</AbsoluteLayout>
这是java
package com.android;
import com.example.tipconverter.R;
import android.app.Activity;
import android.os.Bundle;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Button;
import android.view.View;
public class tipcalc extends Activity {
private EditText txtbillamount;
private EditText txtpeople;
private EditText txtpercentage;
private TextView txtperperson;
private TextView txttipamount;
private TextView txttotal;
private Button btncalculate;
private Button btnreset;
private double billamount = 0;
private double percentage = 0;
private double numofpeople=0;
private double tipamount = 0;
private double totaltopay = 0;
private double perperson = 0;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initControls();
}
private void initControls() {
txtbillamount = (EditText)findViewById(R.id.txtbillamount);
txtpeople = (EditText)findViewById(R.id.txtpeople);
txtpercentage = (EditText)findViewById(R.id.txtpercentage);
txtperperson=(TextView)findViewById(R.id.txtperperson);
txttipamount=(TextView)findViewById(R.id.txttipamount);
txttotal=(TextView)findViewById(R.id.txttotal);
btncalculate = (Button)findViewById(R.id.btncalculate);
btnreset = (Button)findViewById(R.id.btnreset);
btncalculate.setOnClickListener(new Button.OnClickListener() {
public void onClick (View v) {
calculate();
}
});
btnreset.setOnClickListener(new Button.OnClickListener() {
public void onClick (View v){
reset();
}
});
}
private void calculate() {
billamount=Double.parseDouble(txtbillamount.getText().toString());
percentage=Double.parseDouble(txtpercentage.getText().toString());
numofpeople=Double.parseDouble(txtpeople.getText().toString());
tipamount=(billamount*percentage)/100;
totaltopay=billamount+tipamount;
perperson=totaltopay/numofpeople;
txttipamount.setText(Double.toString(tipamount));
txttotal.setText(Double.toString(totaltopay));
txtperperson.setText(Double.toString(perperson));
}
private void reset() {
txtbillamount.setText("");
txtpeople.setText("");
txtpercentage.setText("");
txtperperson.setText("");
txttipamount.setText("");
txttotal.setText("");
}
}
任何提示或帮助将不胜感激。谢谢！
修改的
这是logcat打印的内容
07-09 02:49:02.208: D/AndroidRuntime(283): >>>>>>>>>>>>>> AndroidRuntime START <<<<<<<<<<<<<<
07-09 02:49:02.208: D/AndroidRuntime(283): CheckJNI is ON
07-09 02:49:02.278: D/AndroidRuntime(283): --- registering native functions ---
07-09 02:49:02.598: D/AndroidRuntime(283): Shutting down VM
07-09 02:49:02.598: D/dalvikvm(283): Debugger has detached; object registry had 1 entries
07-09 02:49:02.608: I/AndroidRuntime(283): NOTE: attach of thread 'Binder Thread #3' failed
07-09 02:49:02.878: D/AndroidRuntime(291): >>>>>>>>>>>>>> AndroidRuntime START <<<<<<<<<<<<<<
07-09 02:49:02.878: D/AndroidRuntime(291): CheckJNI is ON
07-09 02:49:02.958: D/AndroidRuntime(291): --- registering native functions ---
07-09 02:49:03.267: I/ActivityManager(58): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=com.example.tipconverter/com.example.tipconverter }
07-09 02:49:03.277: I/ActivityManager(58): Start proc com.example.tipconverter for activity com.example.tipconverter/com.example.tipconverter: pid=297 uid=10036 gids={}
07-09 02:49:03.317: D/AndroidRuntime(291): Shutting down VM
07-09 02:49:03.317: D/dalvikvm(291): Debugger has detached; object registry had 1 entries
07-09 02:49:03.577: D/AndroidRuntime(297): Shutting down VM
07-09 02:49:03.577: W/dalvikvm(297): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
07-09 02:49:03.597: I/ARMAssembler(58): generated scanline__00000077:03545404_00000004_00000000 [ 47 ipp] (67 ins) at [0x381c90:0x381d9c] in 289122 ns
07-09 02:49:03.597: E/AndroidRuntime(297): FATAL EXCEPTION: main
07-09 02:49:03.597: E/AndroidRuntime(297): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.tipconverter/com.example.tipconverter}: java.lang.ClassNotFoundException: com.example.tipconverter in loader dalvik.system.PathClassLoader[/data/app/com.example.tipconverter-1.apk]
07-09 02:49:03.597: E/AndroidRuntime(297): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
07-09 02:49:03.597: E/AndroidRuntime(297): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
07-09 02:49:03.597: E/AndroidRuntime(297): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
07-09 02:49:03.597: E/AndroidRuntime(297): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
07-09 02:49:03.597: E/AndroidRuntime(297): at android.os.Handler.dispatchMessage(Handler.java:99)
07-09 02:49:03.597: E/AndroidRuntime(297): at android.os.Looper.loop(Looper.java:123)
07-09 02:49:03.597: E/AndroidRuntime(297): at android.app.ActivityThread.main(ActivityThread.java:4627)
07-09 02:49:03.597: E/AndroidRuntime(297): at java.lang.reflect.Method.invokeNative(Native Method)
07-09 02:49:03.597: E/AndroidRuntime(297): at java.lang.reflect.Method.invoke(Method.java:521)
07-09 02:49:03.597: E/AndroidRuntime(297): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
07-09 02:49:03.597: E/AndroidRuntime(297): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
07-09 02:49:03.597: E/AndroidRuntime(297): at dalvik.system.NativeStart.main(Native Method)
07-09 02:49:03.597: E/AndroidRuntime(297): Caused by: java.lang.ClassNotFoundException: com.example.tipconverter in loader dalvik.system.PathClassLoader[/data/app/com.example.tipconverter-1.apk]
07-09 02:49:03.597: E/AndroidRuntime(297): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
07-09 02:49:03.597: E/AndroidRuntime(297): at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
07-09 02:49:03.597: E/AndroidRuntime(297): at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
07-09 02:49:03.597: E/AndroidRuntime(297): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
07-09 02:49:03.597: E/AndroidRuntime(297): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
07-09 02:49:03.597: E/AndroidRuntime(297): ... 11 more
07-09 02:49:03.617: W/ActivityManager(58): Force finishing activity com.example.tipconverter/com.example.tipconverter
07-09 02:49:04.119: W/ActivityManager(58): Activity pause timeout for HistoryRecord{45075650 com.example.tipconverter/com.example.tipconverter}
07-09 02:49:14.293: W/ActivityManager(58): Activity destroy timeout for HistoryRecord{45075650 com.example.tipconverter/com.example.tipconverter}
答案 0 :(得分：0)
您是否已在Android清单中声明了自己的活动？
答案 1 :(得分：0)
您可以查看日志：
[2012-07-08 18:05:33 - tipConverter] Starting activity com.example.tipconverter.MainActivity on device emulator-5554
它正在寻找Android清单文件中定义的MainActivity.java。您可能已将其重命名为tipcalc.java。您需要在Android清单文件中进行调整。
<强>更新
这似乎是一个破碎的Android项目设置。结果，生成了一个糟糕的APK。您可以检查Android项目的.properties和.project文件。如有疑问，请尝试从头开始创建一个新项目，并比较所提到文件的差异。还要确保您拥有正确的目标SDK版本。