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我有以下佈局:安卓:如何引用的EditText視圖
<TextView
android:id = "@+id/HRNoninTextBox"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/exitbtn"
android:text="Heart Rate"
android:textSize = "20sp"/>
<EditText
android:id="@+id/labelNoninHeartRate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="00"
android:layout_alignParentRight="true">
</EditText>
從我指的是這些觀點的代碼,形成我的活動,以這樣的方式
TextView tvHr= (TextView)findViewById(R.id.HRNoninTextBox);
EditText etHr = (EditText)findViewById(R.id.labelNoninHeartRate);
第一一個不會產生任何錯誤,而第二個語句產生以下錯誤:
01-09 13:24:57.599: W/dalvikvm(28816): threadid=1: thread exiting with uncaught exception (group=0x4001e578)
01-09 13:24:57.619: E/AndroidRuntime(28816): FATAL EXCEPTION: main
01-09 13:24:57.619: E/AndroidRuntime(28816): java.lang.RuntimeException: Unable to start activity ComponentInfo{aid.assistant233/aid.assistant233.AidAssistant233Activity}: java.lang.ClassCastException: android.widget.TextView
01-09 13:24:57.619: E/AndroidRuntime(28816): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651)
01-09 13:24:57.619: E/AndroidRuntime(28816): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667)
01-09 13:24:57.619: E/AndroidRuntime(28816): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
01-09 13:24:57.619: E/AndroidRuntime(28816): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
01-09 13:24:57.619: E/AndroidRuntime(28816): at android.os.Handler.dispatchMessage(Handler.java:99)
01-09 13:24:57.619: E/AndroidRuntime(28816): at android.os.Looper.loop(Looper.java:130)
01-09 13:24:57.619: E/AndroidRuntime(28816): at android.app.ActivityThread.main(ActivityThread.java:3691)
01-09 13:24:57.619: E/AndroidRuntime(28816): at java.lang.reflect.Method.invokeNative(Native Method)
01-09 13:24:57.619: E/AndroidRuntime(28816): at java.lang.reflect.Method.invoke(Method.java:507)
01-09 13:24:57.619: E/AndroidRuntime(28816): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:907)
01-09 13:24:57.619: E/AndroidRuntime(28816): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665)
01-09 13:24:57.619: E/AndroidRuntime(28816): at dalvik.system.NativeStart.main(Native Method)
01-09 13:24:57.619: E/AndroidRuntime(28816): Caused by: java.lang.ClassCastException: android.widget.TextView
01-09 13:24:57.619: E/AndroidRuntime(28816): at aid.assistant233.AidAssistant233Activity.onCreate(AidAssistant233Activity.java:331)
01-09 13:24:57.619: E/AndroidRuntime(28816): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
01-09 13:24:57.619: E/AndroidRuntime(28816): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615)
01-09 13:24:57.619: E/AndroidRuntime(28816): ... 11 more
問題出在哪裏?
+做一個乾淨的/建立 – NickL
根據LogCat你有'ClassCastException''可以通過雙重檢查你正在實例化適當的TextView或EditText適當的TextView或EditText贖回。但是您已經正確初始化EditText和TextView。所以儘量「清理你的項目」。 –
您的代碼是正確的...清理您的項目並運行.. – Janmejoy