Android - 随机XML膨胀错误

时间：2011-03-17 19:01:52

标签： android xml

在过去的一周里，堆栈溢出对我开发我的第一个Android应用程序非常好。我有一个非常随机的问题。有时我的应用程序在扩展XML布局文件时遇到问题。它不是一个特定的，但是当我更改XML文件时，它随机强制关闭，因为我需要在第18行定义layout_height。至少这是它通常告诉我的。我通常只是重写View标签，它工作正常，但我想了解最新情况。任何帮助表示赞赏！

由于上述问题，下面是FC的示例XML。 

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/bg"
    >
<TextView
    android:id="@+id/noteFormDateTimeTest"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:textColor="#000000"
    android:textStyle="bold"
    android:textSize="26dp" />
<TextView
    android:id="@+id/noteFormContact"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" <!--This would be line 18-->
    android:textColor="#000000"
    android:textStyle="bold"
    android:textSize="26dp" 
    android:layout_below="@id/noteFormDateTimeTest"/>
<EditText
    android:id="@+id/noteFormTitle"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" 
    android:hint="Note Title"
    android:layout_below="@id/noteFormContact"/>
<EditText
    android:id="@+id/noteFormBody"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:singleLine="false"
    android:lines="15"
    android:gravity="top"
    android:hint="Enter Text Here"
    android:layout_below="@id/noteFormTitle" />
<View 
    android:id="@+id/helper" 
    android:layout_width="0dp"
    android:layout_height="0dp" 
    android:layout_alignParentBottom="true"
    android:layout_centerHorizontal="true" />
<Button
    android:id="@+id/noteFormSave"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:text="Save"
    android:layout_alignParentBottom="true"
    android:layout_toLeftOf="@id/helper"/>
<Button
    android:id="@+id/noteFormDiscard"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:text="Discard"
    android:layout_alignParentBottom="true"
    android:layout_toRightOf="@id/helper"/>
</RelativeLayout>

编辑，2011年3月17日下午5:05 CST：

以下是在FC上创建的活动：

package com.onyx.formapp23;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.text.format.DateFormat;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class FormsNewNote extends Activity {    
    String  intentRowId, mIntentName, mIntentId, intentTitle, intentBody, dateTimeValue;
    int contactId;
    TextView contactHeader, dateTimeText;
    EditText titleEdit, bodyEdit;
    long  longRowId;
    Button submitBtn, discardBtn;
    private MyDbAdapter mDb = null;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.forms_newnote);
        Bundle extras = getIntent().getExtras();
        intentRowId = extras.getString("rowId");
        if (intentRowId != null){
            longRowId = Long.decode(intentRowId);
        }
        mIntentId = extras.getString("contactId");
        mIntentName = extras.getString("contactName");
        intentTitle = extras.getString("title");
        intentBody = extras.getString("body");
        mDb = new MyDbAdapter(this);

        contactHeader = (TextView) findViewById(R.id.noteFormContact);
        contactHeader.setText(mIntentId + ": " + mIntentName);

        dateTimeText = (TextView) findViewById(R.id.noteFormDateTimeTest);
        DateFormat dateFormat = (DateFormat) DateFormat.format("MM-dd-yyyy hh:mm:ss", new java.util.Date());
        dateTimeText.setText((CharSequence) dateFormat);

        titleEdit = (EditText) findViewById(R.id.noteFormTitle);
        if (intentTitle != null) {
            titleEdit.setText(intentTitle);
        }
        bodyEdit = (EditText) findViewById(R.id.noteFormBody);
        if (intentBody != null) {
            bodyEdit.setText(intentBody);
        }

        submitBtn = (Button) findViewById(R.id.noteFormSave);
        submitBtn.setOnClickListener(new OnClickListener(){
            @Override
            public void onClick(View v) {
                String titleInsert = titleEdit.getText().toString();
                String bodyInsert = bodyEdit.getText().toString();
                if(titleInsert == null || bodyInsert == null){
                    Context context = getApplicationContext();
                    CharSequence text = "Please fill all fields before saving";
                    int duration = Toast.LENGTH_SHORT;
                    Toast toast = Toast.makeText(context, text, duration);
                    toast.show();
                } else if (intentRowId == null && titleInsert != null && bodyInsert != null){
                    try{
                    mDb.open();
                    mDb.createNote(Integer.parseInt(mIntentId), titleInsert, bodyInsert, dateTimeValue);
                    finish();
                    } catch (Exception e) {
                    e.printStackTrace();
                    }
                } else {
                    try{
                        mDb.open();
                        mDb.updateNote(longRowId, titleInsert, bodyInsert);
                        finish();
                    } catch (Exception e){
                        e.printStackTrace();
                        Context context = getApplicationContext();
                        CharSequence text = "SQL Exception Thrown: " + e;
                        int duration = Toast.LENGTH_SHORT;
                        Toast toast = Toast.makeText(context, text, duration);
                        toast.show();
                    }
                }
                }
        });
        discardBtn = (Button) findViewById(R.id.noteFormDiscard);
        discardBtn.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v){
                finish();
            }
        });
    }


}

活动FC的LogCat：

I/ActivityManager(  316): Starting activity: Intent { cmp=com.onyx.formapp23/.FormsNewNote (has extras) }

D/AndroidRuntime(10518): Shutting down VM

W/dalvikvm(10518): threadid=1: thread exiting with uncaught exception (group=0x40138820)

E/AndroidRuntime(10518): FATAL EXCEPTION: main

E/AndroidRuntime(10518): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.onyx.formapp23/com.onyx.formapp23.FormsNewNote}: java.lang.ClassCastException: java.lang.String

E/AndroidRuntime(10518):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2664)

E/AndroidRuntime(10518):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2680)

E/AndroidRuntime(10518):    at android.app.ActivityThread.access$2300(ActivityThread.java:125)

E/AndroidRuntime(10518):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2034)

E/AndroidRuntime(10518):    at android.os.Handler.dispatchMessage(Handler.java:99)

E/AndroidRuntime(10518):    at android.os.Looper.loop(Looper.java:123)

E/AndroidRuntime(10518):    at android.app.ActivityThread.main(ActivityThread.java:4628)

E/AndroidRuntime(10518):    at java.lang.reflect.Method.invokeNative(Native Method)

E/AndroidRuntime(10518):    at java.lang.reflect.Method.invoke(Method.java:521)

E/AndroidRuntime(10518):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:870)

E/AndroidRuntime(10518):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:628)

E/AndroidRuntime(10518):    at dalvik.system.NativeStart.main(Native Method)

E/AndroidRuntime(10518): Caused by: java.lang.ClassCastException: java.lang.String

E/AndroidRuntime(10518):    at com.onyx.formapp23.FormsNewNote.onCreate(FormsNewNote.java:42)

E/AndroidRuntime(10518):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)

E/AndroidRuntime(10518):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2628)

E/AndroidRuntime(10518):    ... 11 more

W/ActivityManager(  316):   Force finishing activity com.onyx.formapp23/.FormsNewNote

W/ActivityManager(  316):   Force finishing activity com.onyx.formapp23/.NotesList

最后，线程堆栈：

Thread [<1> main] (Suspended (exception RuntimeException))  
    ActivityThread.performLaunchActivity(ActivityThread$ActivityRecord, Intent) line: 2664  
    ActivityThread.handleLaunchActivity(ActivityThread$ActivityRecord, Intent) line: 2680   
    ActivityThread.access$2300(ActivityThread, ActivityThread$ActivityRecord, Intent) line: 125 
    ActivityThread$H.handleMessage(Message) line: 2034  
    ActivityThread$H(Handler).dispatchMessage(Message) line: 99 
    Looper.loop() line: 123 
    ActivityThread.main(String[]) line: 4628    
    Method.invokeNative(Object, Object[], Class, Class[], Class, int, boolean) line: not available [native method]  
    Method.invoke(Object, Object...) line: 521  
    ZygoteInit$MethodAndArgsCaller.run() line: 870  
    ZygoteInit.main(String[]) line: 628 
    NativeStart.main(String[]) line: not available [native method]

2 个答案:

答案 0 :(得分：0)

问题出在你的构建过程中。在制作项目之前先做清洁就可以解决问题。

答案 1 :(得分：0)

布赖恩，

也许问题在于dateTimeValue您将其传递给CreateNote()而没有初始化它。

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