Question

i m 试图为我的安纳塞利乌特撰写一个单位测试。目前,我的测试编码如下:

public class SampleRelativeLayoutTest extends AndroidTestCase {

private ViewGroup testView;

private ImageView icon;
private TextView  title;


@Override
protected void setUp() throws Exception {
    super.setUp();
    // inflate the layout
    final Context context = getContext();
    final LayoutInflater inflater = LayoutInflater.from(context);
    testView = (ViewGroup) inflater.inflate(R.layout.sample_layout,
            null);
    // manually measure and layout
    testView.measure(500, 500);
    testView.layout(0, 0, 500, 500);
    // init variables
    icon = (ImageView) testView.findViewById(R.id.icon);
    title = (TextView) testView.findViewById(R.id.title);
}

然而,我遇到了Null PointerException,其分寸如下:

java.lang.NullPointerException
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:427)
at android.view.View.measure(View.java:7964)
at com.dqminh.test.view.SampleRelativeLayoutTest.setUp(SampleRelativeLayoutTest.java:33)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:169)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:154)
at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:430)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1447)

我应当修改一下我的定点代码,使测试能够适当进行?

Answer 1

我拿到一份安乐来源的复印件,但并不肯定它是否与你所重复(或者说这几类事情确实如此)。唯一的例外是,在Measure方法中,在427条下,采用相关语言。我版本中的这一行程是Measure方法中马卢埃帕拉姆病例变量的首批准入。难道你会想在你们的Xml布局或像这样的东西中增加布局——宽和布局。

Answer 2

如果你在“线索”内总结你的亲子关系,你也将工作。相反,通过“线”

Answer 3

我将做这项工作:

LayoutParams layoutParams = new LayoutParams(500,500);
testView.setLayoutParams(layoutParams);
testView.layout(0, 0, 500, 500);

Answer 4

另一个可能的原因是:你在<代码>中途经与子女状况之间有循环依赖。例如,您有<代码>RelativeLayout。身高限为WRAP_CONTENT,及儿童组为ALIGN_PARENT_BOTTOM。

下面是<代码>的说明。 RelativeLayout:

A Layout where the positions of the children can be described in relation to each other or to the parent. For the sake of efficiency, the relations between views are evaluated in one pass, so if view Y is dependent on the position of view X, make sure the view X comes first in the layout.

请注意,你无法在<代码>RelativeLayout的大小与子女的地位之间有循环依赖。例如,你不能有<代码>RelativeLayout。身高限为WRAP_CONTENT,及儿童组为ALIGN_PARENT_BOTTOM。

排外特性见<代码>RelativeLayout.LayoutParams。

友情链接