java之Android应用程序一启动就崩溃

如果这是一个愚蠢的问题，那么我道歉:

这是我第一次尝试制作一个安卓应用程序，由于某种原因这不会启动。它总是在我单击它时立即关闭关于可能出现问题的任何想法？我迷路了。

package weight.Lifting.stuff; 
import android.app.Activity; 
import android.os.Bundle; 
import android.widget.EditText; 
import android.widget.TextView; 
import android.view.View; 
public class MainActivity extends Activity  
{    
TextView weight100, weight95, weight90, weight85, weight80, weight75, weight70, weight65, weight60; 
    EditText enterWeight, enterReps; 
 
    double Weight=1,Reps=1,a=1,b=1,c=1,d=1,e=1,f=1,g=1,h=1,i=1,A=.95,B=.90,C=.85,D=.80,E=.75,F=.70,G=.65,H=.60,I=.333; 
 
    @Override 
    public void onCreate(Bundle savedInstanceState){  
 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.activity_main_activity__lifting); 
 
        weight100 = (TextView) findViewById (R.id.textView3); 
        weight95 = (TextView) findViewById (R.id.textView8); 
        weight90 = (TextView) findViewById (R.id.textView9); 
        weight85 = (TextView) findViewById (R.id.textView10); 
        weight80 = (TextView) findViewById (R.id.textView11); 
        weight75 = (TextView) findViewById (R.id.textView12); 
        weight70 = (TextView) findViewById (R.id.textView15); 
        weight65 = (TextView) findViewById (R.id.textView16); 
        weight60 = (TextView) findViewById (R.id.textView17); 
 
        enterWeight = (EditText) findViewById (R.id.editText1); 
        enterReps = (EditText) findViewById (R.id.editText2); 
    } 
 
 
 
            public void onButton1Click (View v) 
            { 
 
                Weight = Double.parseDouble(enterWeight.getText().toString()); 
                Reps = Double.parseDouble(enterReps.getText().toString()); 
 
                a = ((Weight*I*Reps)+Weight); 
                b = ((Weight*I*Reps)+Weight)*A; 
                c = ((Weight*I*Reps)+Weight)*B; 
                d = ((Weight*I*Reps)+Weight)*C; 
                e = ((Weight*I*Reps)+Weight)*D; 
                f = ((Weight*I*Reps)+Weight)*E; 
                g = ((Weight*I*Reps)+Weight)*F; 
                h = ((Weight*I*Reps)+Weight)*G; 
                i = ((Weight*I*Reps)+Weight)*H; 
 
                weight100.setText(Double.toString(a)); 
                weight95.setText(Double.toString(b)); 
                weight90.setText(Double.toString(c)); 
                weight85.setText(Double.toString(d)); 
                weight80.setText(Double.toString(e)); 
                weight75.setText(Double.toString(f)); 
                weight70.setText(Double.toString(g)); 
                weight65.setText(Double.toString(h)); 
                weight60.setText(Double.toString(i)); 
            } 
    } 

这是我的xml

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    tools:context=".MainActivity_Lifting" > 
 
    <TextView 
        android:id="@+id/textView1" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_alignParentLeft="true" 
        android:layout_alignParentTop="true" 
        android:text="Enter Weight:" /> 
 
    <EditText 
        android:id="@+id/editText1" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_alignParentLeft="true" 
        android:layout_alignRight="@+id/textView2" 
        android:layout_below="@+id/textView1" 
        android:ems="10" > 
 
        <requestFocus /> 
    </EditText> 
 
    <TextView 
        android:id="@+id/textView2" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_alignParentLeft="true" 
        android:layout_below="@+id/editText1" 
        android:text="Enter Reps:" /> 
 
    <EditText 
        android:id="@+id/editText2" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_alignParentLeft="true" 
        android:layout_alignRight="@+id/textView2" 
        android:layout_below="@+id/textView2" 
        android:ems="10" /> 
 
    <Button 
        android:id="@+id/button1" 
        style="?android:attr/buttonStyleSmall" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_alignParentLeft="true" 
        android:layout_below="@+id/editText2" 
        android:focusableInTouchMode="true" 
        android:gravity="center_vertical|center_horizontal|left" 
        android:onClick="onButton1Click" 
        android:text="Calculate" 
        android:textSize="10sp" /> 
 
    <TextView 
        android:id="@+id/textView4" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_alignBottom="@+id/editText1" 
        android:layout_marginLeft="58dp" 
        android:layout_toRightOf="@+id/editText1" 
        android:text="95% (3 reps)" /> 
 
    <TextView 
        android:id="@+id/textView5" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_above="@+id/editText2" 
        android:layout_alignLeft="@+id/textView4" 
        android:text="90% (5 reps)" /> 
 
    <TextView 
        android:id="@+id/textView6" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_alignLeft="@+id/textView5" 
        android:layout_alignTop="@+id/editText2" 
        android:text="85% (6 reps)" /> 
 
    <TextView 
        android:id="@+id/textView100" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_above="@+id/textView4" 
        android:layout_alignRight="@+id/textView4" 
        android:text="100% (1 rep)" /> 
 
    <TextView 
        android:id="@+id/textView14" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_alignLeft="@+id/textView13" 
        android:layout_below="@+id/textView13" 
        android:text="70% (12 reps)" /> 
 
    <TextView 
        android:id="@+id/textView18" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_alignLeft="@+id/textView14" 
        android:layout_below="@+id/textView14" 
        android:text="65% (15 reps)" /> 
 
    <TextView 
        android:id="@+id/textView19" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_alignLeft="@+id/textView100" 
        android:layout_below="@+id/textView18" 
        android:text="60% (20 reps)" /> 
 
    <TextView 
        android:id="@+id/textView13" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_alignLeft="@+id/textView7" 
        android:layout_below="@+id/editText2" 
        android:text="75% (10 reps)" /> 
 
    <TextView 
        android:id="@+id/textView7" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_alignLeft="@+id/textView100" 
        android:layout_below="@+id/textView6" 
        android:text="80% (8 reps)" /> 
 
    <TextView 
        android:id="@+id/textView3" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_alignBaseline="@+id/textView100" 
        android:layout_alignBottom="@+id/textView100" 
        android:layout_toRightOf="@+id/textView7" 
        android:text="TextView" /> 
 
    <TextView 
        android:id="@+id/textView8" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_below="@+id/textView3" 
        android:layout_toRightOf="@+id/textView4" 
        android:text="TextView" /> 
 
    <TextView 
        android:id="@+id/textView9" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_alignRight="@+id/textView3" 
        android:layout_below="@+id/textView4" 
        android:text="TextView" /> 
 
    <TextView 
        android:id="@+id/textView10" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_alignBaseline="@+id/textView6" 
        android:layout_alignBottom="@+id/textView6" 
        android:layout_alignLeft="@+id/textView8" 
        android:text="TextView" /> 
 
    <TextView 
        android:id="@+id/textView11" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_below="@+id/textView6" 
        android:layout_toRightOf="@+id/textView7" 
        android:clickable="true" 
        android:focusable="true" 
        android:focusableInTouchMode="true" 
        android:text="TextView" /> 
 
    <TextView 
        android:id="@+id/textView12" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_below="@+id/textView11" 
        android:layout_toRightOf="@+id/textView13" 
        android:text="TextView" /> 
 
    <TextView 
        android:id="@+id/textView15" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_alignLeft="@+id/textView12" 
        android:layout_below="@+id/textView13" 
        android:text="TextView" /> 
 
    <TextView 
        android:id="@+id/textView16" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_alignBaseline="@+id/textView18" 
        android:layout_alignBottom="@+id/textView18" 
        android:layout_alignLeft="@+id/textView15" 
        android:text="TextView" /> 
 
    <TextView 
        android:id="@+id/textView17" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_alignBaseline="@+id/textView19" 
        android:layout_alignBottom="@+id/textView19" 
        android:layout_alignLeft="@+id/textView16" 
        android:text="TextView" /> 
 
</RelativeLayout> 

编辑添加的 list xml 和日志 cat

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="weight.Lifting.stuff" 
    android:versionCode="1" 
    android:versionName="1.0" > 
 
    <uses-sdk 
        android:minSdkVersion="8" 
        android:targetSdkVersion="17" /> 
 
    <application 
        android:allowBackup="true" 
        android:icon="@drawable/ic_launcher" 
        android:label="@string/app_name" 
        android:theme="@style/AppTheme" android:debuggable="true"> 
        <activity 
            android:name="weight.Lifting.stuff.MainActivity_Lifting" 
            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> 

LogCat 输出:

02-01 01:49:15.962: W/Trace(785): Unexpected value from nativeGetEnabledTags: 0 
02-01 01:49:15.962: W/Trace(785): Unexpected value from nativeGetEnabledTags: 0 
02-01 01:49:15.983: W/dalvikvm(785): threadid=1: thread exiting with uncaught exception (group=0x40a70930) 
02-01 01:49:16.003: E/AndroidRuntime(785): FATAL EXCEPTION: main 
02-01 01:49:16.003: E/AndroidRuntime(785): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{weight.Lifting.stuff/weight.Lifting.stuff.MainActivity_Lifting}: java.lang.ClassNotFoundException: Didn't find class "weight.Lifting.stuff.MainActivity_Lifting" on path: /data/app/weight.Lifting.stuff-1.apk 
02-01 01:49:16.003: E/AndroidRuntime(785):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2106) 
02-01 01:49:16.003: E/AndroidRuntime(785):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 
02-01 01:49:16.003: E/AndroidRuntime(785):  at android.app.ActivityThread.access$600(ActivityThread.java:141) 
02-01 01:49:16.003: E/AndroidRuntime(785):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 
02-01 01:49:16.003: E/AndroidRuntime(785):  at android.os.Handler.dispatchMessage(Handler.java:99) 
02-01 01:49:16.003: E/AndroidRuntime(785):  at android.os.Looper.loop(Looper.java:137) 
02-01 01:49:16.003: E/AndroidRuntime(785):  at android.app.ActivityThread.main(ActivityThread.java:5039) 
02-01 01:49:16.003: E/AndroidRuntime(785):  at java.lang.reflect.Method.invokeNative(Native Method) 
02-01 01:49:16.003: E/AndroidRuntime(785):  at java.lang.reflect.Method.invoke(Method.java:511) 
02-01 01:49:16.003: E/AndroidRuntime(785):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
02-01 01:49:16.003: E/AndroidRuntime(785):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
02-01 01:49:16.003: E/AndroidRuntime(785):  at dalvik.system.NativeStart.main(Native Method) 
02-01 01:49:16.003: E/AndroidRuntime(785): Caused by: java.lang.ClassNotFoundException: Didn't find class "weight.Lifting.stuff.MainActivity_Lifting" on path: /data/app/weight.Lifting.stuff-1.apk 
02-01 01:49:16.003: E/AndroidRuntime(785):  at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65) 
02-01 01:49:16.003: E/AndroidRuntime(785):  at java.lang.ClassLoader.loadClass(ClassLoader.java:501) 
02-01 01:49:16.003: E/AndroidRuntime(785):  at java.lang.ClassLoader.loadClass(ClassLoader.java:461) 
02-01 01:49:16.003: E/AndroidRuntime(785):  at android.app.Instrumentation.newActivity(Instrumentation.java:1054) 
02-01 01:49:16.003: E/AndroidRuntime(785):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2097) 

请您参考如下方法:

我重新创建了您的项目，它编译并运行没有问题。检查您的 AndroidManifest.xml 是否有问题。考虑将其与您的 LogCat 输出一起发布。