カスタム コンポーネントがあります。
「layout_width 属性を指定する必要があります」というメッセージが常に表示されます。コンポーネントのコンストラクターを通過した後のエラー。多分あなたは私を助けることができます。
コンポーネントのクラス:
public class UndoBar extends LinearLayout {
private TextView messageTextView;
private Button undoButton;
public UndoBar(Context context) {
this(context, null);
}
public UndoBar(Context context, AttributeSet attrs) {
super(context, attrs);
final LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(R.layout.undobar, this);
messageTextView = (TextView) findViewById(R.id.undobar_message);
undoButton = (Button) findViewById(R.id.undobar_button);
setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); // here I set the height/width!!
setOrientation(HORIZONTAL);
setVisibility(GONE);
setPadding(4, 4, 4, 4); // todo muss dp sein
setBackgroundColor(Color.BLUE);
setGravity(Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL);
}
public Button getUndoButton() {
return undoButton;
}
public TextView getMessageTextView() {
return messageTextView;
}
public void setOnClickListener(OnClickListener l) {
undoButton.setOnClickListener(l);
}
}
コンポーネントの XML ファイル:
<merge xmlns:android="http://schemas.android.com/apk/res/android" >
<TextView
android:id="@+id/undobar_message"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Deleted"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#fff" />
<Button
android:id="@+id/undobar_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="30dp"
android:background="#808080"
android:drawableLeft="@drawable/ic_revert"
android:text="Undo"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#fff" />
</merge>
これはコンポーネントが埋め込まれている場所です（ここでコンポーネントの幅/高さを設定しようとしましたが、うまくいきませんでした）：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
...
<de.myapp.android.UndoBar
android:id="@+id/undobar" />
</RelativeLayout>
ログキャット:
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): Binary XML file line #50: You must supply a layout_width attribute.
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): java.lang.RuntimeException: Binary XML file line #50: You must supply a layout_width attribute.
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at android.content.res.TypedArray.getLayoutDimension(TypedArray.java:491)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at android.view.ViewGroup$LayoutParams.setBaseAttributes(ViewGroup.java:5631)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at android.view.ViewGroup$MarginLayoutParams.<init>(ViewGroup.java:5773)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at android.widget.RelativeLayout$LayoutParams.<init>(RelativeLayout.java:1154)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at android.widget.RelativeLayout.generateLayoutParams(RelativeLayout.java:992)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at android.widget.RelativeLayout.generateLayoutParams(RelativeLayout.java:70)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at android.view.LayoutInflater.rInflate(LayoutInflater.java:748)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:270)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at android.app.Activity.setContentView(Activity.java:1881)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at de.innosoft.android.activity.Einsaetze.onCreate(Einsaetze.java:61)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at android.app.Activity.performCreate(Activity.java:5104)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2258)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2354)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at android.app.ActivityThread.access$600(ActivityThread.java:150)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at android.os.Handler.dispatchMessage(Handler.java:99)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at android.os.Looper.loop(Looper.java:137)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at android.app.ActivityThread.main(ActivityThread.java:5191)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at java.lang.reflect.Method.invokeNative(Native Method)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at java.lang.reflect.Method.invoke(Method.java:511)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
01-26 17:48:19.921: E/java.lang.RuntimeException(5832): at dalvik.system.NativeStart.main(Native Method)