我是Android编程的新手，当我启动它时，我的应用程序崩溃了。
这个应用程序是餐馆的小费计算器，我不确定要包含什么，但从以前的帖子，这里是日志和Android清单。
02-09 12:28:50.640: D/AndroidRuntime(1282): Shutting down VM
02-09 12:28:50.640: W/dalvikvm(1282): threadid=1: thread exiting with uncaught exception (group=0xb3a55ba8)
02-09 12:28:50.670: E/AndroidRuntime(1282): FATAL EXCEPTION: main
02-09 12:28:50.670: E/AndroidRuntime(1282): Process: com.example.tipcalculator, PID: 1282
02-09 12:28:50.670: E/AndroidRuntime(1282): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.tipcalculator/com.example.tipcalculator.TipCalculator}: java.lang.ClassNotFoundException: Didn't find class "com.example.tipcalculator.TipCalculator" on path: DexPathList[[directory "."],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
02-09 12:28:50.670: E/AndroidRuntime(1282): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2121)
02-09 12:28:50.670: E/AndroidRuntime(1282): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
02-09 12:28:50.670: E/AndroidRuntime(1282): at android.app.ActivityThread.access$800(ActivityThread.java:135)
02-09 12:28:50.670: E/AndroidRuntime(1282): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
02-09 12:28:50.670: E/AndroidRuntime(1282): at android.os.Handler.dispatchMessage(Handler.java:102)
02-09 12:28:50.670: E/AndroidRuntime(1282): at android.os.Looper.loop(Looper.java:136)
02-09 12:28:50.670: E/AndroidRuntime(1282): at android.app.ActivityThread.main(ActivityThread.java:5017)
02-09 12:28:50.670: E/AndroidRuntime(1282): at java.lang.reflect.Method.invokeNative(Native Method)
02-09 12:28:50.670: E/AndroidRuntime(1282): at java.lang.reflect.Method.invoke(Method.java:515)
02-09 12:28:50.670: E/AndroidRuntime(1282): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
02-09 12:28:50.670: E/AndroidRuntime(1282): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
02-09 12:28:50.670: E/AndroidRuntime(1282): at dalvik.system.NativeStart.main(Native Method)
02-09 12:28:50.670: E/AndroidRuntime(1282): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.example.tipcalculator.TipCalculator" on path: DexPathList[[directory "."],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
02-09 12:28:50.670: E/AndroidRuntime(1282): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
02-09 12:28:50.670: E/AndroidRuntime(1282): at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
02-09 12:28:50.670: E/AndroidRuntime(1282): at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
02-09 12:28:50.670: E/AndroidRuntime(1282): at android.app.Instrumentation.newActivity(Instrumentation.java:1061)
02-09 12:28:50.670: E/AndroidRuntime(1282): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2112)
02-09 12:28:50.670: E/AndroidRuntime(1282): ... 11 more
并且Android清单是：
<uses-sdk
android:minSdkVersion="10"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" android:persistent="false" android:hasCode="false">
<activity
android:name="com.example.tipcalculator.TipCalculator"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
和Java代码 package com.example.tipcalculator;
import java.text.DecimalFormat;
import android.os.Bundle;
import android.app.Activity;
import android.view.KeyEvent;
import android.view.Menu;
import android.widget.EditText;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.TextView.OnEditorActionListener;
import android.widget.Toast;
import android.widget.SeekBar.OnSeekBarChangeListener;
public class TipCalculator extends Activity {
// variables
private double billAmt; //original bill amount
private double tipPerC; //tip percent
private double total; //final bill
private double tip; //tip dollar value
//for printing values properly
private DecimalFormat df;
private String end;
// all of my elements used
private EditText _billAmt;
private EditText _tip;
private EditText _total;
private SeekBar _tipPerC;
private TextView _seekBarValue;
// initialize variables corresponding to Palette items
private void intitializeValues() {
billAmt = total = tip = 0;
tipPerC = 1500;
// http://stackoverflow.com/questions/2538787/how-to-display-an-output-of-float-data-with-2-decimal-places-in-java
df = new DecimalFormat("#.##");
_billAmt = (EditText) findViewById(R.id.billAmt);
_tip = (EditText) findViewById(R.id.tip);
_total = (EditText) findViewById(R.id.total);
_tipPerC = (SeekBar) findViewById(R.id.tipPerC);
_seekBarValue = (TextView) findViewById(R.id.seekBarValue);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tip_calculator);
// Initialize Values
intitializeValues();
// write functions for updating the SeekBar value as it is changed
// http://stackoverflow.com/questions/19383246/set-custom-values-to-seek-bar
_tipPerC.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
int progress = _tipPerC.getProgress();
// update TextView and global variable "tipPerC" for later
// calculations
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
_seekBarValue.setText(String.valueOf(progress));
tipPerC = (double) progress;
}
// update TextView and global variable "tipPerC" for later
// calculations
@Override
public void onStartTrackingTouch(SeekBar arg0) {
_seekBarValue.setText(String.valueOf(progress));
tipPerC = (double) progress;
}
@Override
public void onStopTrackingTouch(SeekBar arg0) {
// default code, do nothing
}
});
//listener after Bill Amount has been entered or modified
_billAmt.setOnEditorActionListener(new OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
// get value of float entry
if (_billAmt.length() < 1) {
Toast.makeText(getApplicationContext(), "Enter Amount", Toast.LENGTH_LONG).show();
} else {
billAmt = Double.parseDouble(_billAmt.getText().toString());
}
//calculations
tip = billAmt * (tipPerC / 10000);
total = billAmt + tip;
// update views
end = df.format(tip);
_tip.setText(end);
end = df.format(total);
_total.setText(end);
//default return?
return false;
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.tip_calculator, menu);
return true;
}
}
如果还有什么我应该发布，或者我还有什么需要做的，请告诉我。谢谢大家的帮助。