安卓 : How to put cross icon on top of the autocomplete textView

Question

我在将十字按钮放在 TextView 顶部时遇到问题。我正在使用 LinearLayout 并且它没有出现，而在 Framelayout 上它可以工作但这并不能解决我的目的。我附上我的 XML 以供引用，请帮助我解决这个问题。

<LinearLayout
        android:id="@+id/top"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/phone_toolbar"
        android:baselineAligned="true"
        android:gravity="center_horizontal"
        android:paddingBottom="2dp"
        android:paddingTop="2dp" >

        <ImageView
            android:id="@+id/search_icon"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:layout_marginLeft="5dp"
            android:layout_marginRight="10dp"
            android:background="@drawable/toolbar_search_icon_phone" >
        </ImageView>

        <AutoCompleteTextView
            android:id="@+id/text"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:layout_marginRight="10dp"
            android:layout_weight="2"
            android:background="@drawable/toolbar_phone_textfield"
            android:dropDownVerticalOffset="5dp"
            android:ems="10"
            android:focusable="true"
            android:hint="@string/hint"
            android:imeOptions="actionSearch"
            android:paddingLeft="10dp"
            android:paddingRight="20dp"
            android:singleLine="true"
            android:textColor="#000000"
            android:textSize="14sp" />

        <Button
            android:id="@+id/clear_text"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="right|center_vertical"
            android:layout_marginRight="10dip"
            android:background="@drawable/text_clear" />
    </LinearLayout>

谢谢!

Answer 1

在 EditText 上使用 android:drawableLeft 属性。

<EditText
 ...     
android:drawableLeft="@drawable/my_icon" />

如果你想动态添加图标，使用这个:

EditText et = (EditText) findViewById(R.id.myET);
et.setCompoundDrawablesWithIntrinsicBounds(R.drawable.my_icon, 0, 0, 0);

处理点击事件:

String value = "";//any text you are pre-filling in the EditText

final EditText et = new EditText(this);
et.setText(value);
final Drawable x = getResources().getDrawable(R.drawable.presence_offline);//your x image, this one from standard android images looks pretty good actually
x.setBounds(0, 0, x.getIntrinsicWidth(), x.getIntrinsicHeight());
et.setCompoundDrawables(null, null, value.equals("") ? null : x, null);
et.setOnTouchListener(new OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        if (et.getCompoundDrawables()[2] == null) {
            return false;
        }
        if (event.getAction() != MotionEvent.ACTION_UP) {
            return false;
        }
        if (event.getX() > et.getWidth() - et.getPaddingRight() - x.getIntrinsicWidth()) {
            et.setText("");
            et.setCompoundDrawables(null, null, null, null);
        }
        return false;
    }
});
et.addTextChangedListener(new TextWatcher() {
    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
        et.setCompoundDrawables(null, null, et.getText().toString().equals("") ? null : x, null);
    }

    @Override
    public void afterTextChanged(Editable arg0) {
    }

    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
    }
});

这也可以使用自定义 EditText 来完成:

Handling click events on a drawable within an EditText