START :: HELLO_GALLERY_PROJECT-FILES

Question

我正在为我编写的一些代码实现测试蒸馏成下面粘贴的示例项目。我遇到的问题是测试挂起了测试运行器和在我的测试用例中没有一个测试运行。

我已将问题跟踪到对invalidate（）的调用 getChildStaticTransformation（查看孩子，转型t）我是谁重写做一些缩放效果。

如果我注释掉对invalidate（）的调用，则运行测试。该我调用invalidate（）的原因是为了确保视图得到应用缩放效果后重新绘制。

如果我没有调用invalidate（）那么视图看起来不正常，直到a 用户操作强制屏幕重绘。

两个问题：

为什么invalidate（）阻止测试运行？
我是否应该以不同的方式对视图进行缩放要求invalidate（）被调用吗？

以下是Eclipse Android Console的输出显示位置测试挂起：

[2011-08-19 13:51:27 - HelloGalleryTest]
------------------------------
[2011-08-19 13:51:27 - HelloGalleryTest] Android Launch!
[2011-08-19 13:51:27 - HelloGalleryTest] adb is running normally.
[2011-08-19 13:51:27 - HelloGalleryTest] Performing
android.test.InstrumentationTestRunner JUnit launch
[2011-08-19 13:51:27 - HelloGalleryTest] Automatic Target Mode: using
device '428024642BF9457'
[2011-08-19 13:51:27 - HelloGalleryTest] Uploading
HelloGalleryTest.apk onto device '428024642BF9457'
[2011-08-19 13:51:27 - HelloGalleryTest] Installing
HelloGalleryTest.apk...
[2011-08-19 13:51:29 - HelloGalleryTest] Success!
[2011-08-19 13:51:29 - HelloGalleryTest] Project dependency found,
installing: HelloGallery
[2011-08-19 13:51:29 - HelloGallery] Uploading HelloGallery.apk onto
device '428024642BF9457'
[2011-08-19 13:51:29 - HelloGallery] Installing HelloGallery.apk...
[2011-08-19 13:51:31 - HelloGallery] Success!
[2011-08-19 13:51:31 - HelloGalleryTest] Launching instrumentation
android.test.InstrumentationTestRunner on device 428024642BF9457
[2011-08-19 13:51:31 - HelloGalleryTest] Collecting test information
[2011-08-19 13:51:32 - HelloGalleryTest] Sending test information to
Eclipse
[2011-08-19 13:51:32 - HelloGalleryTest] Running tests...

下面是我编写的示例项目代码和测试用例表现出我上面描述的问题。 HelloGallery.getChildStaticTransformation（查看子项，转换 t）是调用invalidate（）的方法。

下面包含的其他文件是为了您想要的完整性尝试构建项目并观察我所描述的行为。

START :: HELLO_GALLERY_PROJECT-FILES

HelloGallery.java

package com.hello;

import android.content.Context;
import android.graphics.Camera;
import android.graphics.Matrix;
import android.util.AttributeSet;
import android.view.View;
import android.view.animation.Transformation;
import android.widget.Gallery;

public class HelloGallery extends Gallery {

       private Camera mCamera = new Camera();

       /**
        * The position (index) of the centered view in the gallery.
        */
       public int mCenterViewPositionIndex;

       public HelloGallery(Context context, AttributeSet attrs) {
               super(context, attrs);
               this.setStaticTransformationsEnabled(true);
       }

       /**
        * {@inheritDoc}
        *
        * @see #setStaticTransformationsEnabled(boolean)
        */
       protected boolean getChildStaticTransformation(View child,
Transformation t) {
               t.clear();

               mCamera.save();
               final Matrix imageMatrix = t.getMatrix();
               int position = getPositionForView(child);
               t.setTransformationType(Transformation.TYPE_MATRIX);

               if (child == getSelectedView()) {
                       mCenterViewPositionIndex = position;

                       t.setAlpha(1f);
                       mCamera.translate(-20, 20, -200);
               }
               else if(((mCenterViewPositionIndex - 1) == position )) {
                       t.setAlpha(0.5f);
                       // no need to zoom this view.
               }
               else if((mCenterViewPositionIndex + 1) == position ) {
                       t.setAlpha(0.5f);
                       // no need to zoom this view.
               }

               else if(((mCenterViewPositionIndex - 2) == position )) {
                       t.setAlpha(0.35f);
                       mCamera.translate(0, 0, 250);
               }
               else if((mCenterViewPositionIndex + 2) == position ) {
                       t.setAlpha(0.35f);
                       mCamera.translate(0, 0, 250);
               }

               else if(((mCenterViewPositionIndex - 3) == position )) {
                       t.setAlpha(0.1f);
                       mCamera.translate(0, 0, 350);
               }
               else if((mCenterViewPositionIndex + 3) == position ) {
                       t.setAlpha(0.2f);
                       mCamera.translate(0, 0, 350);
               }else {
                       t.setAlpha(0.1f);
                       mCamera.translate(0, 0, 450);
               }

               mCamera.getMatrix(imageMatrix);
               mCamera.restore();
//              invalidate();  //  <----  commenting out this line allows the Test
to run.   Uncommenting this line will not allow the Test to run.

               return true;
       }
}

HelloGalleryActivity.java

package com.hello;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Gallery;

public class HelloGalleryActivity extends Activity implements OnItemClickListener {
    private Gallery mGallery;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        mGallery=(Gallery)findViewById(R.id.gallery);

        //String array holding the values
        String [] text=new String[]{"Hello","Hi","Alloha","Bonjour","Hallo","¡Hola"};

        //Circular Array adapter to display our values in the gallery control
        HomeGalleryAdapter adapter = new HomeGalleryAdapter(this, R.layout.gallery_item_layout, text);
        mGallery.setAdapter(adapter);
        mGallery.setSelection(adapter.MIDDLE);
        mGallery.setOnItemClickListener(this);
        mGallery.setOnTouchListener(new OnTouchListener() {

            public boolean onTouch(View arg0, MotionEvent arg1) {
                Log.d("HelloGalleryActivity", " --> onTouch");
                return false;
            }
        });        
    }

    @Override
    public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
        Log.d("HelloGalleryActivity", " --> onItemClick");  
    }
}

HelloGalleryAdapter.java

package com.hello;

import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

public class HomeGalleryAdapter extends ArrayAdapter<String> {
       private LayoutInflater mLayoutInflater;
       private TextView mText;
       private int mLayoutId;

       public static final int HALF_MAX_VALUE = Integer.MAX_VALUE/2;
   public final int MIDDLE;
   private String[] mObjects;

       public HomeGalleryAdapter(Context context, int layoutId, String[]
lables) {
               super(context, 0, lables);

               mLayoutInflater = ((Activity) context).getLayoutInflater();
               mLayoutId = layoutId;

           mObjects = lables;
           MIDDLE = HALF_MAX_VALUE - HALF_MAX_VALUE % lables.length;
       }

       public int getCount() {
               return Integer.MAX_VALUE;
       }

       public String getItem(int position) {
               return mObjects[position % mObjects.length];
       }

       public long getItemId(int position) {
               return position % mObjects.length;
       }

       public View getView(int position, View convertView, ViewGroup group)
{
               if (convertView == null) {
                       convertView = mLayoutInflater.inflate(mLayoutId, group, false);
               }

               mText = (TextView) convertView.findViewById(R.id.gallery_item_text);

               mText.setText((String) getItem(position));
               mText.setTextColor(Color.WHITE);

               convertView.setTag(mText.getText());

               return convertView;
       }
}

RES /布局/ main.xml中

<?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">

       <TextView
               android:id="@+id/textview"
               android:layout_width="fill_parent"
               android:layout_height="wrap_content"
               android:text="@string/hello" />

       <com.hello.HelloGallery
               android:id="@+id/gallery"
               android:layout_gravity="center"
               android:spacing="0dp"
               android:layout_width="fill_parent"
               android:layout_height="fill_parent" />
</LinearLayout>

RES /布局/ gallery_item_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
       xmlns:android="http://schemas.android.com/apk/res/android"
       android:id="@+id/home_gallery_item_layout"
       android:orientation="vertical"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:layout_gravity="center">

       <RelativeLayout
               android:id="@+id/gallery_item_background"
               android:layout_width="100dip"
               android:layout_height="100dip"
               android:orientation="horizontal"
               android:background="@drawable/gallery_item_selector">

               <ImageView
                       android:src="@drawable/icon"
                       android:id="@+id/gallery_item_icon"
                       android:layout_width="wrap_content"
                       android:layout_height="wrap_content"
                       android:layout_centerInParent="true" />

       </RelativeLayout>

       <TextView
               android:id="@+id/gallery_item_text"
               android:layout_width="wrap_content"
               android:layout_height="wrap_content"
               android:layout_gravity="center"
               android:textSize="20sp" />
</LinearLayout>

RES /抽拉/ gallery_item_selector.xml

 <selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true"
          android:drawable="@drawable/background_selected" /> <!--
pressed -->
    <item android:drawable="@drawable/background_normal" /> <!--
default -->
 </selector>

RES /抽拉/ background_normal.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
   android:shape="rectangle">
   <gradient
       android:startColor="#80000000"
       android:endColor="#80FFFFFF"
       android:angle="45"/>
   <padding android:left="7dp"
       android:top="7dp"
       android:right="7dp"
       android:bottom="7dp" />
   <corners android:radius="8dp" />
</shape>

RES /抽拉/ background_selected.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
   android:shape="rectangle">
   <gradient
       android:startColor="#80000000"
       android:endColor="#807EB6FF"
       android:angle="45"/>
   <padding android:left="7dp"
       android:top="7dp"
       android:right="7dp"
       android:bottom="7dp" />
   <corners android:radius="8dp" />
</shape>

的AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest
       xmlns:android="http://schemas.android.com/apk/res/android"
       package="com.hello"
       android:versionCode="1"
       android:versionName="1.0">
       <uses-sdk
               android:minSdkVersion="7" />

       <application
               android:icon="@drawable/icon"
               android:label="@string/app_name">
               <activity
                       android:name=".HelloGalleryActivity"
                       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>

END :: HELLO_GALLERY_PROJECT-FILES

START :: HELLO_GALLERY_TEST_PROJECT-FILES

HelloGalleryActivityTest.java（＆lt; ----此文件进入测试项目!!）

package com.hello.test;

import android.test.ActivityInstrumentationTestCase2;
import android.widget.Gallery;
import android.widget.SpinnerAdapter;

import com.hello.HelloGalleryActivity;

public class HelloGalleryActivityTest extends
ActivityInstrumentationTestCase2<HelloGalleryActivity> {
       private HelloGalleryActivity mActivity; // the activity under test
       private Gallery mGallery;
       private String[] mGalleryDataTestArray;
       private SpinnerAdapter mGalleryData;

       public HelloGalleryActivityTest() {
               super("com.hello", HelloGalleryActivity.class);
               mGalleryDataTestArray = new String[] { "Hello", "Hi", "Alloha",
"Bonjour", "Hallo", "¡Hola" };
       }

       @Override
       protected void setUp() throws Exception {
               super.setUp();
               setActivityInitialTouchMode(false);

               mActivity = this.getActivity();
               mGallery = (Gallery) mActivity.findViewById(com.hello.R.id.gallery);
               mGalleryData = (SpinnerAdapter) mGallery.getAdapter();
       }

       public void testPreconditions() {
               assertNotNull(mActivity);
               assertNotNull(mGallery);
               assertNotNull(mGallery.getOnItemClickListener());
               assertNotNull(mGalleryData);
       }

       public void testInitialGalleryPosition() {
               int position = mGallery.getSelectedItemPosition();
               String galleryItemLabel = (String)
mGallery.getItemAtPosition(position);

               assertEquals(mGalleryDataTestArray[0], galleryItemLabel);
       }
}

的AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.hello.test"
     android:versionCode="1"
     android:versionName="1.0">
   <uses-sdk android:minSdkVersion="12" />
   <instrumentation android:targetPackage="com.hello"
android:name="android.test.InstrumentationTestRunner" />
   <application android:icon="@drawable/icon" android:label="@string/
app_name">

   <uses-library android:name="android.test.runner" />
   </application>
</manifest>

END :: HELLO_GALLERY_TEST_PROJECT-FILE

Answer 1

尝试postInvalidate（）而不是invalidate（）。

我不是100％确定发生了什么，但我怀疑你的代码中存在阻止UI线程的内容。使用postInvalidate（）将立即返回并让您的代码完成，这将取消阻止UI线程。

Answer 2

问题解决了！

不需要无效调用..它会使事情变得紧张！

诀窍是向HelloGallery.java添加一个方法来设置中心位置并在超类上调用setPosition。

<强> HelloGallery.java

public void setSelectionToCenter(int position) {
    mCenterViewPositionIndex = position;
    setSelection(mCenterViewPositionIndex);
}

然后在HelloGalleryActivity中调用setSelectionToCenter方法而不是setSelection。

<强> HelloGalleryActivity

public void onCreate(Bundle savedInstanceState) {
    ...
    ((HelloGallery)mGallery).setSelectionToCenter(adapter.MIDDLE);
    ...
}

现在，测试就像一个魅力！活泉！
感谢神秘开发人员Betsy为我追踪这个！

ActivityInstrumentationTestCase2问题 - 测试挂起因为代码中的invalidate（）调用我正在编写测试

START :: HELLO_GALLERY_PROJECT-FILES

HelloGallery.java

HelloGalleryActivity.java

HelloGalleryAdapter.java

RES /布局/ main.xml中

RES /布局/ gallery_item_layout.xml

RES /抽拉/ gallery_item_selector.xml

RES /抽拉/ background_normal.xml

RES /抽拉/ background_selected.xml

的AndroidManifest.xml

END :: HELLO_GALLERY_PROJECT-FILES

START :: HELLO_GALLERY_TEST_PROJECT-FILES

HelloGalleryActivityTest.java（＆lt; ----此文件进入测试项目!!）

的AndroidManifest.xml

END :: HELLO_GALLERY_TEST_PROJECT-FILE

2 个答案: