Android UI details (edittext, listview, fill screen, etc.), androidedittext

Android UI details (edittext, listview, fill screen, etc.), androidedittext

This week, the company's App is about to be released. According to the UI requirements, the UI interaction is adjusted again. Summary of the small knowledge details.

I. Control focus acquisition

mText.setText("gfgss");mText.setFocusable(true);

The input box in xml sets the default retrieval focus. <requestFocus/>

        <AutoCompleteTextView            android:layout_width="0dp"            android:layout_height="match_parent">            <requestFocus />        </AutoCompleteTextView>

2. How to place the cursor at the end of the text in EditText?

mText.setSelection(mText.getText().length());

Iii. Problem of setting the Input Method for activity. If a suspended layout is involved, use adjustPan to cover the input box.

The stateHidden input method does not pop up during activity startup. It is configured in activity.

android:windowSoftInputMode="stateHidden|adjustPan"

4. Set the split line of layout or the split line of listview

android:divider="@drawable/shape_divider"android:showDividers="beginning|middle|end" 

5. Remove the listview scrolling display

android:scrollbars="none"

6. Remove the split line of listview.

android:divider="@null"

7. Remove the selected color by default.
(1) set the backgroudcolor attribute of layout.
(2)

android:focusable="false"android:focusableInTouchMode="false"android:cacheColorHint="#00000000"android:listSelector="#00000000"

8. Replace the default selected color of listview.
Set the listSelector attribute of listivew.

9. intelligently fill the remaining screens
Sometimes the following two statements are better than android: layout_width = "match_parent. More intelligent filling of remaining screens

android:layout_height="0dp"android:layout_weight="1" 

10. Use the ScrollView attribute fillViewport to solve the problem that the android layout cannot be full screen.
When the elements in ScrollView want to fill up ScrollView, "fill_parent" is useless and must be set for ScrollView: android: fillViewport = "true ".
When ScrollView does not have fillVeewport = "true", the elements (such as LinearLayout) in the ScrollView are calculated according to wrap_content (whether or not it sets "fill_parent "), if fill_parent is set for the LinearLayout element, it is useless because LinearLayout depends on the element in it and the element in it depends on LinearLayout. therefore, fill_parent is set in the element, which is also calculated as wrap_content.

11. Click a part other than the dialog box to end the activity.

public boolean onTouchEvent(MotionEvent event) {if (MotionEvent.ACTION_OUTSIDE == event.getAction()) {finish();return true;}return super.onTouchEvent(event);}

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