Question

使用findViewById

初始化变量时，我的Android活动崩溃了

public class RaportGreutateActivity extends AppCompatActivity {


EditText etDate;
EditText etGreutate;
Button addValues;

DatabaseReference dr;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_raport_greutate);

    init();



}

public void init() {


      etDate = (EditText) findViewById(R.id.etDataRaport);
    etGreutate = (EditText) findViewById(R.id.etRaportGreutate);
    addValues = (Button) findViewById(R.id.btnAdaugaraport);
    dr = FirebaseDatabase.getInstance().getReference("raport");

    addValues.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            Add();
        }
    });

}

这就是我的代码。

如果我评论init（）;从onCreate开始，我的活动开启得很好。

顺便说一句，这不是由于Add（）;函数，我试图在onCreate方法上手动初始化etDate，但结果仍然相同，所以问题出在初始化的地方。

我第一次尝试使用firebase实时数据库。

谢谢！

编辑：

这里的堆栈跟踪

01-03 22:21:45.482 12237-12237/com.example.dani.zamfireduard_1076 E/AndroidRuntime: FATAL EXCEPTION: main
                                                                                Process: com.example.dani.zamfireduard_1076, PID: 12237
                                                                                java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.dani.zamfireduard_1076/com.example.dani.zamfireduard_1076.RaportGreutateActivity}: java.lang.ClassCastException: android.widget.RelativeLayout cannot be cast to android.widget.EditText
                                                                                    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)
                                                                                    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
                                                                                    at android.app.ActivityThread.access$800(ActivityThread.java:151)
                                                                                    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
                                                                                    at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                                    at android.os.Looper.loop(Looper.java:135)
                                                                                    at android.app.ActivityThread.main(ActivityThread.java:5254)
                                                                                    at java.lang.reflect.Method.invoke(Native Method)
                                                                                    at java.lang.reflect.Method.invoke(Method.java:372)
                                                                                    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
                                                                                    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
                                                                                 Caused by: java.lang.ClassCastException: android.widget.RelativeLayout cannot be cast to android.widget.EditText
                                                                                    at com.example.dani.zamfireduard_1076.RaportGreutateActivity.init(RaportGreutateActivity.java:43)
                                                                                    at com.example.dani.zamfireduard_1076.RaportGreutateActivity.onCreate(RaportGreutateActivity.java:34)
                                                                                    at android.app.Activity.performCreate(Activity.java:5990)
                                                                                    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
                                                                                    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
                                                                                    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387) 
                                                                                    at android.app.ActivityThread.access$800(ActivityThread.java:151) 
                                                                                    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303) 
                                                                                    at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                                                    at android.os.Looper.loop(Looper.java:135) 
                                                                                    at android.app.ActivityThread.main(ActivityThread.java:5254) 
                                                                                    at java.lang.reflect.Method.invoke(Native Method) 
                                                                                    at java.lang.reflect.Method.invoke(Method.java:372) 
                                                                                    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) 
                                                                                    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

XML

 <TextView
    android:id="@+id/tvData"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_alignParentTop="true"
    android:layout_marginLeft="12dp"
    android:layout_marginStart="12dp"
    android:layout_marginTop="28dp"
    android:text="@string/Data" />

<EditText
    android:id="@+id/etDataRaport"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignBaseline="@+id/tvData"
    android:layout_alignBottom="@+id/tvData"
    android:layout_centerHorizontal="true"
    android:ems="10"
    android:hint="@string/Varsta"
    android:inputType="date" />

<EditText
    android:id="@+id/etRaportGreutate"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignEnd="@+id/etDataRaport"
    android:layout_alignRight="@+id/etDataRaport"
    android:layout_alignTop="@+id/btnAdaugaraport"
    android:ems="10"
    android:inputType="number" />

<TextView
    android:id="@+id/textView9"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignBottom="@+id/etRaportGreutate"
    android:layout_alignLeft="@+id/tvData"
    android:layout_alignStart="@+id/tvData"
    android:layout_marginBottom="11dp"
    android:text="@string/Greutate" />

Answer 1

String title = driver.findElement(By.cssSelector("#firstHeading")).getText();
if (title.contentEquals("Selenium (software)"))
    System.out.println("Test Passed!");
else
    System.out.println("Test Failed!");

这告诉您问题是您正在投射相对布局来编辑文本。检查java.lang.ClassCastException: android.widget.RelativeLayout cannot be cast to android.widget.EditText和etDataRaport的XML。

初始化变量

1 个答案: