java需要noob帮助理解如何调试

Question

请原谅我的混乱，我不熟悉在论坛上发布错误报告和java编辑

目前，我点击添加按钮，它只是一次又一次地崩溃

LogCat

    10-21 04:52:30.000: D/gralloc_goldfish(531): Emulator without GPU emulation detected.
    10-21 04:53:08.681: D/AndroidRuntime(531): Shutting down VM
    10-21 04:53:08.681: W/dalvikvm(531): threadid=1: thread exiting with uncaught exception (group=0x409961f8)
    10-21 04:53:08.712: E/AndroidRuntime(531): FATAL EXCEPTION: main
    10-21 04:53:08.712: E/AndroidRuntime(531): java.lang.IllegalStateException: Could not execute method of the activity
    10-21 04:53:08.712: E/AndroidRuntime(531):  at 安卓.view.View$1.onClick(View.java:3039)
    10-21 04:53:08.712: E/AndroidRuntime(531):  at 安卓.view.View.performClick(View.java:3480)
    10-21 04:53:08.712: E/AndroidRuntime(531):  at 安卓.view.View$PerformClick.run(View.java:13983)
    10-21 04:53:08.712: E/AndroidRuntime(531):  at 安卓.os.Handler.handleCallback(Handler.java:605)
    10-21 04:53:08.712: E/AndroidRuntime(531):  at 安卓.os.Handler.dispatchMessage(Handler.java:92)
    10-21 04:53:08.712: E/AndroidRuntime(531):  at 安卓.os.Looper.loop(Looper.java:137)
    10-21 04:53:08.712: E/AndroidRuntime(531):  at 安卓.app.ActivityThread.main(ActivityThread.java:4340)
    10-21 04:53:08.712: E/AndroidRuntime(531):  at java.lang.reflect.Method.invokeNative(Native Method)
    10-21 04:53:08.712: E/AndroidRuntime(531):  at java.lang.reflect.Method.invoke(Method.java:511)
    10-21 04:53:08.712: E/AndroidRuntime(531):  at com.安卓.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
    10-21 04:53:08.712: E/AndroidRuntime(531):  at com.安卓.internal.os.ZygoteInit.main(ZygoteInit.java:551)
    10-21 04:53:08.712: E/AndroidRuntime(531):  at dalvik.system.NativeStart.main(Native Method)
    10-21 04:53:08.712: E/AndroidRuntime(531): Caused by: java.lang.reflect.InvocationTargetException
    10-21 04:53:08.712: E/AndroidRuntime(531):  at java.lang.reflect.Method.invokeNative(Native Method)
    10-21 04:53:08.712: E/AndroidRuntime(531):  at java.lang.reflect.Method.invoke(Method.java:511)
    10-21 04:53:08.712: E/AndroidRuntime(531):  at 安卓.view.View$1.onClick(View.java:3034)
    10-21 04:53:08.712: E/AndroidRuntime(531):  ... 11 more
    10-21 04:53:08.712: E/AndroidRuntime(531): Caused by: 安卓.content.ActivityNotFoundException: Unable to find explicit activity class {com.oatmeal.recipebookapp/com.oatmeal.recipebookapp.NewRecipe}; have you declared this activity in your AndroidManifest.xml?
    10-21 04:53:08.712: E/AndroidRuntime(531):  at 安卓.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1508)
    10-21 04:53:08.712: E/AndroidRuntime(531):  at 安卓.app.Instrumentation.execStartActivity(Instrumentation.java:1384)
    10-21 04:53:08.712: E/AndroidRuntime(531):  at 安卓.app.Activity.startActivityForResult(Activity.java:3190)
    10-21 04:53:08.712: E/AndroidRuntime(531):  at 安卓.app.Activity.startActivity(Activity.java:3297)
    10-21 04:53:08.712: E/AndroidRuntime(531):  at com.oatmeal.recipebookapp.MainActivity.showAddRecipe(MainActivity.java:57)

主要活动。爪哇

package com.oatmeal.recipebookapp;

import java.util.ArrayList;
import java.util.HashMap;

import 安卓.app.ListActivity;
import 安卓.content.Intent;
import 安卓.os.Bundle;
import 安卓.view.View;
import 安卓.widget.AdapterView;
import 安卓.widget.AdapterView.OnItemClickListener;
import 安卓.widget.ListAdapter;
import 安卓.widget.ListView;
import 安卓.widget.SimpleAdapter;
import 安卓.widget.TextView;



public class MainActivity extends ListActivity {

    Intent intent;
    TextView recipeId;

    DBTools dbTools = new DBTools(this);

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        ArrayList<HashMap<String, String>> recipeList = dbTools.getAllRecipes();

        if(recipeList.size() != 0){
            ListView listView = getListView();
            listView.setOnItemClickListener(new OnItemClickListener() {


                public void onItemClick(AdapterView<?> parent, View view,int position, long id) { 

                recipeId = (TextView) view.findViewById(R.id.recipeId);

                String recipeIdValue = recipeId.getText().toString();
                Intent theIntent = new Intent(getApplication(), EditRecipe.class);
                theIntent.putExtra("recipeId", recipeIdValue);
                startActivity(theIntent);
                }
                });
            ListAdapter adapter = new SimpleAdapter( MainActivity.this,recipeList,R.layout.recipe_entry, new String [] {"recipeId", "recipeName", "recipeNumber"}, new int[] {R.id.recipeId, R.id.recipeNumber, R.id.recipeName});

            setListAdapter(adapter);
            }

        }
    public void showAddRecipe(View view){
        Intent theIntent = new Intent(getApplication(), NewRecipe.class);
        startActivity(theIntent);
    }
    }

新配方。JAVA 包com。燕麦粥recipebookapp

import java.util.HashMap;

import 安卓.app.Activity;
import 安卓.content.Intent;
import 安卓.os.Bundle;
import 安卓.view.View;
import 安卓.widget.EditText;




    public class NewRecipe extends Activity{



        EditText recipeName;
        EditText recipeNumber;

        DBTools dbTools = new DBTools(this);

        @Override
        public void onCreate(Bundle savedInstanceState) {



            super.onCreate(savedInstanceState);



            setContentView(R.layout.add_new_recipe);


            recipeName = (EditText) findViewById(R.id.recipeName);
            recipeNumber = (EditText) findViewById(R.id.recipeNumber);


        }
        public void addNewRecipe(View view) {



            HashMap<String, String> queryValuesMap =  new  HashMap<String, String>();



            queryValuesMap.put("recipeName", recipeName.getText().toString());
            queryValuesMap.put("recipeNumber", recipeNumber.getText().toString());



            dbTools.insertRecipe(queryValuesMap);



            this.callMainActivity(view);
        }
       public void callMainActivity(View view) {
            Intent theIntent = new Intent(getApplication(), MainActivity.class);
            startActivity(theIntent);
        }  
    }

主要活动。xml

<TableLayout xmlns:安卓="http://schemas.安卓.com/apk/res/安卓"
    xmlns:tools="http://schemas.安卓.com/tools"
    安卓:layout_width="match_parent"
    安卓:layout_height="match_parent"
    tools:context=".MainActivity" >

    <TableRow
        安卓:id="@+id/tableRow1"
        安卓:layout_width="match_parent"
        安卓:layout_height="match_parent"
         安卓:background="#000000"
         >

        <TextView
            安卓:id="@+id/recipeTitleTextView"
            安卓:layout_width="wrap_content"
            安卓:layout_height="wrap_content"
            安卓:layout_marginLeft="@dimen/padding_5dp"
            安卓:text="@string/recipe_title"
            安卓:textAppearance="?安卓:attr/textAppearanceLarge"
            安卓:textColor="#FFFFFF"
            安卓:layout_weight= "1" />

        <Button
            安卓:id="@+id/button1"
            安卓:background="#444444"
            安卓:onClick="showAddRecipe"
            安卓:text="@string/add_button"
            安卓:textSize="20sp"
            安卓:textColor="#FFFFFF" />

    </TableRow>

    <TableRow
        安卓:id="@+id/tableRow2"
        安卓:layout_width="match_parent"
        安卓:layout_height="wrap_content" >

        <ListView
            安卓:id="@安卓:id/list"
            安卓:layout_width="match_parent"
            安卓:layout_height="wrap_content"
            安卓:layout_weight= "1" >
        </ListView>

    </TableRow>

</TableLayout>

添加新配方。xml

<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:安卓="http://schemas.安卓.com/apk/res/安卓"
    安卓:layout_width="match_parent"
    安卓:layout_height="match_parent" >



    <TableRow
        安卓:id="@+id/tableRow1"
        安卓:layout_width="wrap_content"
        安卓:layout_height="wrap_content"
        安卓:background="#000000" >

            <TextView
                安卓:id="@+id/addRecipeTextView"
                安卓:layout_width="match_parent"
                安卓:layout_height="wrap_content"
                安卓:padding="@dimen/padding_5dp"
                安卓:textAppearance="?安卓:attr/textAppearanceLarge"
                安卓:textColor="#FFFFFF"
                安卓:text="@string/add_recipe" />

    </TableRow>

    <TableRow
        安卓:id="@+id/tableRow2"
        安卓:layout_width="match_parent"
        安卓:layout_height="wrap_content" >

        <TextView
            安卓:id="@+id/recipeNameTextView"
            安卓:layout_width="wrap_content"
            安卓:layout_height="wrap_content"
            安卓:layout_weight="1"
            安卓:padding="@dimen/padding_5dp"
            安卓:text="@string/recipe_name" />

        <EditText
            安卓:id="@+id/recipeName"
            安卓:layout_width="wrap_content"
            安卓:layout_height="wrap_content"
            安卓:layout_weight="1"
            安卓:ems="10"
            安卓:inputType="textCapCharacters"
            安卓:padding="@dimen/padding_5dp" >

            <requestFocus />
        </EditText>

    </TableRow>

    <TableRow
        安卓:id="@+id/tableRow3"
        安卓:layout_width="match_parent"
        安卓:layout_height="wrap_content" >

        <TextView
            安卓:id="@+id/recipeNumberTextView"
            安卓:layout_width="wrap_content"
            安卓:layout_height="wrap_content"
            安卓:layout_weight="1"
            安卓:padding="@dimen/padding_5dp"
            安卓:text="@string/recipe_number" />

        <EditText
            安卓:id="@+id/recipeNumber"
            安卓:layout_width="wrap_content"
            安卓:layout_height="wrap_content"
            安卓:layout_weight="1"
            安卓:ems="10"
            安卓:inputType="number"
            安卓:padding="@dimen/padding_5dp" >

            <requestFocus />
        </EditText>

    </TableRow>

    <TableRow
        安卓:id="@+id/tableRow4"
        安卓:layout_width="match_parent"
        安卓:layout_height="wrap_content" >

    </TableRow>

    <TableRow
        安卓:id="@+id/tableRow5"
        安卓:layout_width="match_parent"
        安卓:layout_height="wrap_content" >

        <Button
            安卓:id="@+id/addButton"
            安卓:layout_width="wrap_content"
            安卓:layout_height="wrap_content"
            安卓:text="@string/save_data"
            安卓:onClick="addNewRecipe"
            安卓:layout_weight="1" />

    </TableRow>

</TableLayout>

显示

protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        ArrayList<HashMap<String, String>> recipeList = dbTools.getAllRecipes();

        if(recipeList.size() != 0){
            ListView listView = getListView();
            listView.setOnItemClickListener(new OnItemClickListener() {


                public void onItemClick(AdapterView<?> parent, View view,int position, long id) { 

                recipeId = (TextView) view.findViewById(R.id.recipeId);

                String recipeIdValue = recipeId.getText().toString();
                Intent theIntent = new Intent(getApplication(), EditRecipe.class);
                theIntent.putExtra("recipeId", recipeIdValue);
                startActivity(theIntent);
                }
                });
            ListAdapter adapter = new SimpleAdapter( MainActivity.this,recipeList,R.layout.recipe_entry, new String [] {"recipeId", "recipeName", "recipeNumber"}, new int[] {R.id.recipeId, R.id.recipeNumber, R.id.recipeName});

            setListAdapter(adapter);
            }

        }
    public void showAddRecipe(View view){
        Intent theIntent = new Intent(getApplication(), NewRecipe.class);
        startActivity(theIntent);
    }

    }

Answer 1

搜索与您的应用程序相关的错误，如下所示

10-21 04:53:08.712: E/AndroidRuntime(531): Caused by: android.content.ActivityNotFoundException: Unable to find explicit activity class {com.oatmeal.recipebookapp/com.oatmeal.recipebookapp.NewRecipe}; have you declared this activity in your AndroidManifest.xml?

这表明您尚未在AndroidManifest.xml中声明活动NewRecipe。这样做，你的应用程序应该可以工作。 像这样声明activity

<activity
        android:name=".NewRecipe"/>

如果需要，可以添加intent-filters

Answer 2

您是否在清单中声明了您的活动 已引发ActivityNotFoundException

Answer 3

它显示错误，因为您可能忘记在清单文件中声明活动NewRecipe

 <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >    
  <activity
            android:name=".NewRecipe"/>
   </application>