Android应用程序无法启动

我所要做的就是打开一个非常简单的应用程序，它除了在textView上面显示imageView之外什么都不做。在我添加imageView之前，应用程序运行良好，因此我假设我的问题与此有关

代码如下：

package com.isi.sa;

import android.app.Activity;
import android.os.Bundle;

public class SimpleAssessment extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.main);
    }
}

这是我的布局->main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

    <ImageView
        android:layout_width="fill_parent"
        android:src="@drawable/isi_logo"/>

    <TextView  
        android:layout_width="fill_parent" 
        android:layout_height="fill_parent" 
        android:text="@string/hello"
        android:background="@color/white"
        android:textColor="@color/black"/>
</LinearLayout>

Eclipse中的控制台日志显示以下消息：

[2010-04-16 11:08:44 - SimpleAssessment] ------------------------------
[2010-04-16 11:08:44 - SimpleAssessment] Android Launch!
[2010-04-16 11:08:44 - SimpleAssessment] adb is running normally.
[2010-04-16 11:08:44 - SimpleAssessment] Performing com.isi.sa.SimpleAssessment activity launch
[2010-04-16 11:08:44 - SimpleAssessment] Automatic Target Mode: launching new emulator with compatible AVD 'my_avd'
[2010-04-16 11:08:44 - SimpleAssessment] Launching a new emulator with Virtual Device 'my_avd'
[2010-04-16 11:08:47 - SimpleAssessment] New emulator found: emulator-5554
[2010-04-16 11:08:47 - SimpleAssessment] Waiting for HOME ('android.process.acore') to be launched...
[2010-04-16 11:09:31 - SimpleAssessment] WARNING: Application does not specify an API level requirement!
[2010-04-16 11:09:31 - SimpleAssessment] Device API version is 3 (Android 1.5)
[2010-04-16 11:09:31 - SimpleAssessment] HOME is up on device 'emulator-5554'
[2010-04-16 11:09:31 - SimpleAssessment] Uploading SimpleAssessment.apk onto device 'emulator-5554'
[2010-04-16 11:09:31 - SimpleAssessment] Installing SimpleAssessment.apk...
[2010-04-16 11:10:04 - SimpleAssessment] Success!
[2010-04-16 11:10:04 - SimpleAssessment] Starting activity com.isi.sa.SimpleAssessment on device 
[2010-04-16 11:10:09 - SimpleAssessment] ActivityManager: Starting: Intent { action=android.intent.action.MAIN categories={android.intent.category.LAUNCHER} comp={com.isi.sa/com.isi.sa.SimpleAssessment} }

---

提前感谢您的帮助

ImageView缺少布局高度，您不能将它们都作为“填充父对象”。您应该使用相对高度或绝对高度/宽度。

控制台日志通常不如DDMS的输出有用，以供将来参考。第一部分是问题。每个元素都需要布局高度和布局宽度。将ImageView的布局高度设置为“包裹内容”看起来像是预期的。这是我的问题。谢谢你的帮助。

[2010-04-16 11:08:44 - SimpleAssessment] ------------------------------
[2010-04-16 11:08:44 - SimpleAssessment] Android Launch!
[2010-04-16 11:08:44 - SimpleAssessment] adb is running normally.
[2010-04-16 11:08:44 - SimpleAssessment] Performing com.isi.sa.SimpleAssessment activity launch
[2010-04-16 11:08:44 - SimpleAssessment] Automatic Target Mode: launching new emulator with compatible AVD 'my_avd'
[2010-04-16 11:08:44 - SimpleAssessment] Launching a new emulator with Virtual Device 'my_avd'
[2010-04-16 11:08:47 - SimpleAssessment] New emulator found: emulator-5554
[2010-04-16 11:08:47 - SimpleAssessment] Waiting for HOME ('android.process.acore') to be launched...
[2010-04-16 11:09:31 - SimpleAssessment] WARNING: Application does not specify an API level requirement!
[2010-04-16 11:09:31 - SimpleAssessment] Device API version is 3 (Android 1.5)
[2010-04-16 11:09:31 - SimpleAssessment] HOME is up on device 'emulator-5554'
[2010-04-16 11:09:31 - SimpleAssessment] Uploading SimpleAssessment.apk onto device 'emulator-5554'
[2010-04-16 11:09:31 - SimpleAssessment] Installing SimpleAssessment.apk...
[2010-04-16 11:10:04 - SimpleAssessment] Success!
[2010-04-16 11:10:04 - SimpleAssessment] Starting activity com.isi.sa.SimpleAssessment on device 
[2010-04-16 11:10:09 - SimpleAssessment] ActivityManager: Starting: Intent { action=android.intent.action.MAIN categories={android.intent.category.LAUNCHER} comp={com.isi.sa/com.isi.sa.SimpleAssessment} }