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他一直在推动我，我希望有人能为我揭示一些事情。Android：活动启动时奇怪的崩溃。关于XML布局的订购
我在我的xml文件中重复3次以下XML布局，并且一切正常，直到...我通过<ImageView>标记添加背景图像并将所述图像与SeekBar的底部对齐，然后更改@ + id的周围，所以imageview有+。 现在奇怪的是我可以做到这一点到最后一个布局组，但不是其他人。为了空间的缘故，我在这里包括了两个。后者是一种享受。然而，它会允许我把第二个（这在下面的第一个清单（recordBox）直接在seekbar上方，但不在linearlayout之上（并且我希望它在TextView之上，所以它在后面），那就是当崩溃开始时。我也试过把它从最后一个拿下来，只穿上这个，还没有快乐
我刚刚注意到的另一件事我也可以让playBackBox在playBackSeek上有@ + id引用。
任何想法了吗？
<RelativeLayout
android:id="@+id/recordBox"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/intervalBox"
android:orientation="vertical"
>
<ImageView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:scaleType="fitXY"
android:src="@drawable/background"
android:layout_alignBottom="@+id/recordSeek"
/>
<TextView android:id="@+id/recordHeader"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Record Duration"
android:gravity="left"
android:paddingTop="10dp"
android:layout_marginLeft="70dp"
android:textColor="#000000"
/>
<LinearLayout android:id="@+id/record2ndBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_below="@id/recordHeader"
android:layout_alignLeft="@id/recordHeader"
>
<EditText
android:id="@+id/recordValue"
android:layout_width="75dp"
android:layout_height="40dp"
android:text="50"
android:textSize="14sp"
android:gravity="center"
android:inputType="number"
android:layout_marginRight="10dp"
/>
<Spinner android:id="@+id/recordType"
android:layout_width="140dp"
android:layout_height="40dp"
android:drawSelectorOnTop="false"
android:layout_marginTop="1dp"
/>
</LinearLayout>
<SeekBar android:id="@id/recordSeek"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:max="100"
android:progress="50"
android:layout_below="@id/record2ndBox"
android:layout_alignLeft="@id/recordHeader"
android:paddingBottom="20dp"
android:paddingRight="20dp"
/>
</RelativeLayout>
<RelativeLayout
android:id="@+id/playBackBox"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/recordBox"
android:orientation="vertical"
>
<ImageView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:scaleType="fitXY"
android:src="@drawable/background"
android:layout_alignBottom="@+id/playBackSeek"
/>
<TextView android:id="@+id/playBackHeader"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Play Back Duration"
android:gravity="left"
android:paddingTop="10dp"
android:layout_marginLeft="70dp"
android:textColor="#000000"
/>
<LinearLayout android:id="@+id/playBack2ndBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_below="@id/playBackHeader"
android:layout_alignLeft="@id/playBackHeader"
>
<EditText
android:id="@+id/playBackValue"
android:layout_width="75dp"
android:layout_height="40dp"
android:text="50"
android:textSize="14sp"
android:gravity="center"
android:inputType="number"
android:layout_marginRight="10dp"
/>
<Spinner android:id="@+id/playBackType"
android:layout_width="140dp"
android:layout_height="40dp"
android:drawSelectorOnTop="false"
android:layout_marginTop="1dp"
/>
</LinearLayout>
<SeekBar android:id="@id/playBackSeek"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:max="100"
android:progress="50"
android:layout_below="@id/playBack2ndBox"
android:layout_alignLeft="@id/playBackHeader"
android:paddingBottom="20dp"
android:paddingRight="20dp"
/>
</RelativeLayout>
这里是错误转储。
03-21 17:26:26.934: E/AndroidRuntime(621): FATAL EXCEPTION: main
03-21 17:26:26.934: E/AndroidRuntime(621): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mediabar.timelapse/com.mediabar.timelapse.TimeLapseCalculator}: java.lang.ClassCastException: android.widget.Spinner
03-21 17:26:26.934: E/AndroidRuntime(621): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
03-21 17:26:26.934: E/AndroidRuntime(621): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
03-21 17:26:26.934: E/AndroidRuntime(621): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
03-21 17:26:26.934: E/AndroidRuntime(621): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
03-21 17:26:26.934: E/AndroidRuntime(621): at android.os.Handler.dispatchMessage(Handler.java:99)
03-21 17:26:26.934: E/AndroidRuntime(621): at android.os.Looper.loop(Looper.java:123)
03-21 17:26:26.934: E/AndroidRuntime(621): at android.app.ActivityThread.main(ActivityThread.java:4627)
03-21 17:26:26.934: E/AndroidRuntime(621): at java.lang.reflect.Method.invokeNative(Native Method)
03-21 17:26:26.934: E/AndroidRuntime(621): at java.lang.reflect.Method.invoke(Method.java:521)
03-21 17:26:26.934: E/AndroidRuntime(621): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
03-21 17:26:26.934: E/AndroidRuntime(621): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
03-21 17:26:26.934: E/AndroidRuntime(621): at dalvik.system.NativeStart.main(Native Method)
03-21 17:26:26.934: E/AndroidRuntime(621): Caused by: java.lang.ClassCastException: android.widget.Spinner
03-21 17:26:26.934: E/AndroidRuntime(621): at com.mediabar.timelapse.TimeLapseCalculator.onCreate(TimeLapseCalculator.java:154)
03-21 17:26:26.934: E/AndroidRuntime(621): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
03-21 17:26:26.934: E/AndroidRuntime(621): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
的OnCreate的要求
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState); //anim is coming in, going out
overridePendingTransition(R.anim.pull_right_in, R.anim.push_left_out);
setContentView(R.layout.calculator);
HDDResults = (TextView)findViewById(R.id.HDDResults);
timeResults = (TextView)findViewById(R.id.TimeResults);
extraResults = (TextView)findViewById(R.id.ExtraResults);
HDDResults.setText("HDD:");
timeResults.setText("time Results Area:");
extraResults.setText("Extra Results Area:");
radioGroup = (RadioGroup) findViewById(R.id.calcBy);
rb1 = (RadioButton) findViewById(R.id.byInterval);
rb2 = (RadioButton) findViewById(R.id.byRecord);
rb3 = (RadioButton) findViewById(R.id.byPlayBack);
radioGroup.setOnCheckedChangeListener(this);
intSeek = (SeekBar)findViewById(R.id.intervalSeek);
intSeek.setOnSeekBarChangeListener(this);
intTextValue = (EditText)findViewById(R.id.intervalValue);
intTextValue.setOnFocusChangeListener(this);
intTextValue.addTextChangedListener(this);
intType=(Spinner)findViewById(R.id.intervalType);
intType.setOnItemSelectedListener(this);
ArrayAdapter<String> intTypelist=new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,intTypeItems);
intTypelist.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
intType.setAdapter(intTypelist);
recSeek = (SeekBar)findViewById(R.id.recordSeek);
recSeek.setOnSeekBarChangeListener(this);
recTextValue = (EditText)findViewById(R.id.recordValue);
recTextValue.setOnFocusChangeListener(this);
recTextValue.addTextChangedListener(this);
recType=(Spinner)findViewById(R.id.recordType);
recType.setOnItemSelectedListener(this);
ArrayAdapter<String> recTypelist=new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,recTypeItems);
recTypelist.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
recType.setAdapter(recTypelist);
playSeek = (SeekBar)findViewById(R.id.playBackSeek);
playSeek.setOnSeekBarChangeListener(this);
playTextValue = (EditText)findViewById(R.id.playBackValue);
playTextValue.setOnFocusChangeListener(this);
playTextValue.addTextChangedListener(this);
playType=(Spinner)findViewById(R.id.playBackType);
playType.setOnItemSelectedListener(this);
ArrayAdapter<String> playTypelist=new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,playTypeItems);
playTypelist.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
playType.setAdapter(playTypelist);
}
你可以发布你的onCreate方法吗？ – kishu27 2012-03-21 17:35:14