我有一个自定义控件，它应该像 iOS 中的 Segmenttab 控制器一样工作。
它有 3 个文本视图，布局如下：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/groupofthree"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@color/background"
android:orientation="horizontal" >
<TextView
android:id="@+id/tv_1"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="@color/black"
android:gravity="center"
android:text="Retiree"
android:textColor="@color/whitetext"
android:textSize="15dp"
android:textStyle="normal" />
<TextView
android:id="@+id/tv_2"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="@color/lightGrey"
android:gravity="center"
android:padding="3dp"
android:text="Under18/fulltime"
android:textColor="@color/whitetext"
android:textSize="15dp"
android:textStyle="normal" />
<TextView
android:id="@+id/tv_3"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="@color/black"
android:gravity="center"
android:text="Others"
android:textColor="@color/whitetext"
android:textSize="15dp"
android:textStyle="normal" />
</LinearLayout>
控件如下所示：
public class SegmentedRadioGroup extends View{
private Context m_Context;
public TextView tv1;
public TextView tv2;
public TextView tv3;
int selectedIndex = 0;
public SegmentedRadioGroup(Context context, AttributeSet attrs) {
super(context, attrs);
m_Context = context;
}
public SegmentedRadioGroup(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public SegmentedRadioGroup(Context context) {
super(context);
// TODO Auto-generated constructor stub
m_Context = context;
LayoutInflater inflater = (LayoutInflater) m_Context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View v = inflater.inflate(R.layout.threeradiobutton, null);
v.isInEditMode();
tv1 = (TextView) v.findViewById(R.id.tv_1);
tv2 = (TextView) v.findViewById(R.id.tv_2);
tv3 = (TextView) v.findViewById(R.id.tv_3);
tv1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
selectedIndex = 0;
tv1.setBackgroundColor(R.color.darkgrey);
tv2.setBackgroundColor(R.color.lightGrey);
tv3.setBackgroundColor(R.color.lightGrey);
}
});
tv2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
selectedIndex = 1;
tv1.setBackgroundColor(R.color.lightGrey);
tv2.setBackgroundColor(R.color.darkgrey);
tv3.setBackgroundColor(R.color.lightGrey);
}
});
tv3.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
selectedIndex = 2;
tv1.setBackgroundColor(R.color.lightGrey);
tv2.setBackgroundColor(R.color.lightGrey);
tv3.setBackgroundColor(R.color.darkgrey);
}
});
}
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
}
}
我将此自定义视图添加到布局的活动如下：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@color/background"
android:orientation="vertical" >
<RelativeLayout
android:id="@+id/widget1216"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/appspecific_menubar" >
<TextView
android:id="@+id/widget1222"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="@string/transaction_accounts_topbar"
android:textColor="@color/whitetext"
android:textSize="18sp"
android:textStyle="bold" >
</TextView>
<ImageButton
android:id="@+id/home_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:background="@null"
android:paddingBottom="5dip"
android:paddingLeft="10dip"
android:paddingTop="5dip"
android:src="@drawable/home" >
</ImageButton>
</RelativeLayout>
<LinearLayout
android:id="@+id/testLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" />.
</LinearLayout>
活动看起来像这样。我已使用 addview 将视图添加到布局中。
public class TransactionAccount extends Activity {
LinearLayout selector;
SegmentedRadioGroup sg_test;
LayoutInflater inflater;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.transactionaccount_main);
selector = (LinearLayout)findViewById(R.id.testLayout);
sg_test = new SegmentedRadioGroup(this);
selector.addView(sg_test);
// inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
// selector = inflater.inflate(R.id., null);
// sg_test = new SegmentedRadioGroup(this);
// sg_test.tv1.setText("1");
// sg_test.tv2.setText("2");
// sg_test.tv3.setText("3");
// sg_test.tv1.setBackgroundColor(R.color.blacktext);
// sg_test.setVisibility(View.VISIBLE);
//
// Log.d("TransactionAccount", "onCreate++++++" + sg_test.tv1.getText());
// Log.d("TransactionAccount", "onCreate++++++" + sg_test.tv2.getText());
// Log.d("TransactionAccount", "onCreate++++++" + sg_test.tv3.getText());
}
}
但我在屏幕上看到的是一个空白屏幕.. 而不是应该显示的自定义控件。请告诉我我哪里出错了。
提前致谢。