带有提示和图像的 Android 可点击 TextView 可启动搜索对话框并显示所选结果

Question

我正在寻找一个示例来展示如何实现可点击的 TextView ，该 TextView 会启动 Android 默认搜索对话框并显示选定的结果行。

它应该与 Android 上 Google map 操作栏中的搜索字段具有相同的行为和设计(例如，左侧的放大镜图标，如果 TextView 为空，则显示“搜索”提示，单击会启动定义的搜索对话框通过可搜索的条目):

Answer 1

这是带有复合可绘制对象的自定义 EditText

public class SearchEditText extends EditText {

    private boolean mMagnifyingGlassShown = true;
    private Drawable mMagnifyingGlass;

    public SearchEditText(Context context, AttributeSet attrs) {
        super(context, attrs);
        mMagnifyingGlass = getCompoundDrawables()[0];
    }

    /**
     * Conditionally shows a magnifying glass icon on the left side of the text field
     * when the text it empty.
     */
    @Override
    public boolean onPreDraw() {
        boolean emptyText = TextUtils.isEmpty(getText());
        if (mMagnifyingGlassShown != emptyText) {
            mMagnifyingGlassShown = emptyText;
            if (mMagnifyingGlassShown) {
                setCompoundDrawables(mMagnifyingGlass, null, null, null);
            } else {
                setCompoundDrawables(null, null, null, null);
            }
            return false;
        }
        return super.onPreDraw();
    }

和xml

<view
                class="com.tr.search.SearchEditText"
                android:id="@+id/search_src_text"
                android:layout_height="wrap_content"
                android:layout_width="0dip"
                android:layout_weight="1.0"
                android:singleLine="true"
                android:ellipsize="end"
                android:hint="@string/search_bar_hint"
                android:drawableLeft="@drawable/magnifying_glass"
                android:freezesText="true"
            />

结果