Android AND-401 問題集

質問 1：
Which of the following is incorrect about the LogCat tool?
A. A LogCat view is available as part of the ADT plugin of Eclipse.
B. Only one of your application can create log entries, and it should be component class (Activity, Service,...etc).
C. Each log message has a tag.
D. You can create a log in your application using Log.v(String, String).
正解：B

質問 2：
Consider the following :
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@+id/create_new" android:title="@string/create_new" />
<item android:id="@+id/open" android:title="@string/open" />
</menu> public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.create_new:
newFile(); return true default:
return super.onOptionsItemSelected(item);
}
}
Upon clicking on one of the menu items, the application did not behave as intended. Which of the following might be the cause of this problem?
A. The developer did not set onClickListener on the menu item.
B. The developer should add the item to the menu resource file.
C. The developer should create onOptionsItemSelected method for each menu item.
D. The developer did not include a case that corresponds to the menu item in method onOptionsItemSelected.
正解：D

質問 3：
Which of the following is not true about using a WebView in your application?
A. You need to add permission "android.permission.ACCESS_NETWORK_STATE".
B. You use loadData to load HTML.
C. You use loadURL to load a webpage.
D. You can retrieve WebSettings with getSettings(), then enable/disable JavaScript.
正解：A

質問 4：
Which of the following Activity life-cycle methods is called once the activity is no longer visible?
A. onHide
B. onDestroy
C. onPause
D. onStop
正解：D

質問 5：
Which Which of the following does NOT correctly describe interface android.widget.Adapter?
A. It is responsible for making a View for each item in the data set.
B. It provides access to deprecated ListView methods.
C. It provides access to the data items.
D. It is an object that acts as a bridge between a View and underlying data for that view.
正解：B

質問 6：
Which of the following statements about DDMS is incorrect?
A. You can use it to acquire screenshots of a terminal.
B. You can display a list of currently running threads and select one to check its stack trace.
C. You can do simulations of network zone speed and bandwidth limitations.
D. You can forcibly execute garbage collection and check the present heap usage status.
正解：C

質問 7：
Which of the following is a call-back method that inflates an options menu from file res/menu/menu.xml?
A. onCreate
B. onCreateOptionsMenu
C. Primitive onCreateMenu
D. onOptionsItemSelected
正解：B

質問 8：
Consider the following AndroidManifest.xml file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="mycube.test" android:versionCode="1" android:versionName="1.0" >
<uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" />
<application android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@android:style/Theme.Light.NoTitleBar" >
<activity android:name=".Menu" android:screenOrientation="portrait" 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>
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<activity android:name=".Compute" android:screenOrientation="portrait" />
</manifest>
What is the syntax error of this file?
A. The INTERNET permission must be removed.
B. The <activity> tag for Activity ".Compute" should be contained inside <application> tag.
C. the package name must be "com.mycube.test".
D. Tag uses-sdk must have attribute android:maxSdkVersion set.
正解：C