创建一个看起来像材料设计指南的SearchView
我目前正在学习如何将我的应用程序转换为Material Design，并且我现在有点卡住了。 我已经添加了工具栏，并且使导航抽屉覆盖了所有内容。
我现在试图创建一个可扩展的搜索，看起来像材料准则中的那个： 
这是我现在所拥有的，我无法弄清楚如何使它像上面那样： 
这是我的菜单xml：
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/action_search"
android:icon="@android:drawable/ic_menu_search"
android:title="Search"
app:showAsAction="always"
app:actionViewClass="android.support.v7.widget.SearchView" />
</menu>
这有效，我得到一个扩展到SearchView的菜单项，我可以很好地过滤我的列表。 虽然它看起来不像第一张照片。
我尝试在R.id.action_search上使用MenuItemCompat.setOnActionExpandListener() ，所以我可以将主图标更改为后退箭头，但这似乎不起作用。 听众没有什么会被解雇。 即使这样做，它仍然不会非常接近第一张图片。
如何在新的appcompat工具栏中创建看起来像材料准则的SearchView？
如果您使用的是android.support.v7库，那么这样做很容易。
步骤1
声明一个菜单项
<item android:id="@+id/action_search"
android:title="Search"
android:icon="@drawable/abc_ic_search_api_mtrl_alpha"
app:showAsAction="ifRoom|collapseActionView"
app:actionViewClass="android.support.v7.widget.SearchView" />
第2步
扩展AppCompatActivity并在onCreateOptionsMenu设置SearchView。
import android.support.v7.widget.SearchView;
...
public class YourActivity extends AppCompatActivity {
...
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_home, menu);
// Retrieve the SearchView and plug it into SearchManager
final SearchView searchView = (SearchView) MenuItemCompat.getActionView(menu.findItem(R.id.action_search));
SearchManager searchManager = (SearchManager) getSystemService(SEARCH_SERVICE);
searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
return true;
}
...
}
结果
经过一周的困惑。 我想我已经明白了。
我现在只使用工具栏内的EditText。 这是由reddit上的oj88向我推荐的。
我现在有这个： 
首先在我的活动的onCreate（）中，我在工具栏的右侧添加了带有图像视图的EditText，如下所示：
// Setup search container view
searchContainer = new LinearLayout(this);
Toolbar.LayoutParams containerParams = new Toolbar.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
containerParams.gravity = Gravity.CENTER_VERTICAL;
searchContainer.setLayoutParams(containerParams);
// Setup search view
toolbarSearchView = new EditText(this);
// Set width / height / gravity
int[] textSizeAttr = new int[]{android.R.attr.actionBarSize};
int indexOfAttrTextSize = 0;
TypedArray a = obtainStyledAttributes(new TypedValue().data, textSizeAttr);
int actionBarHeight = a.getDimensionPixelSize(indexOfAttrTextSize, -1);
a.recycle();
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(0, actionBarHeight);
params.gravity = Gravity.CENTER_VERTICAL;
params.weight = 1;
toolbarSearchView.setLayoutParams(params);
// Setup display
toolbarSearchView.setBackgroundColor(Color.TRANSPARENT);
toolbarSearchView.setPadding(2, 0, 0, 0);
toolbarSearchView.setTextColor(Color.WHITE);
toolbarSearchView.setGravity(Gravity.CENTER_VERTICAL);
toolbarSearchView.setSingleLine(true);
toolbarSearchView.setImeActionLabel("Search", EditorInfo.IME_ACTION_UNSPECIFIED);
toolbarSearchView.setHint("Search");
toolbarSearchView.setHintTextColor(Color.parseColor("#b3ffffff"));
try {
// Set cursor colour to white
// https://stackoverflow.com/a/26544231/1692770
// https://github.com/android/platform_frameworks_base/blob/kitkat-release/core/java/android/widget/TextView.java#L562-564
Field f = TextView.class.getDeclaredField("mCursorDrawableRes");
f.setAccessible(true);
f.set(toolbarSearchView, R.drawable.edittext_whitecursor);
} catch (Exception ignored) {
}
// Search text changed listener
toolbarSearchView.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
Fragment mainFragment = getFragmentManager().findFragmentById(R.id.container);
if (mainFragment != null && mainFragment instanceof MainListFragment) {
((MainListFragment) mainFragment).search(s.toString());
}
}
@Override
public void afterTextChanged(Editable s) {
// https://stackoverflow.com/a/6438918/1692770
if (s.toString().length() <= 0) {
toolbarSearchView.setHintTextColor(Color.parseColor("#b3ffffff"));
}
}
});
((LinearLayout) searchContainer).addView(toolbarSearchView);
// Setup the clear button
searchClearButton = new ImageView(this);
Resources r = getResources();
int px = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 16, r.getDisplayMetrics());
LinearLayout.LayoutParams clearParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
clearParams.gravity = Gravity.CENTER;
searchClearButton.setLayoutParams(clearParams);
searchClearButton.setImageResource(R.drawable.ic_close_white_24dp); // TODO: Get this image from here: https://github.com/google/material-design-icons
searchClearButton.setPadding(px, 0, px, 0);
searchClearButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
toolbarSearchView.setText("");
}
});
((LinearLayout) searchContainer).addView(searchClearButton);
// Add search view to toolbar and hide it
searchContainer.setVisibility(View.GONE);
toolbar.addView(searchContainer);
这工作，但后来我遇到了一个问题，onOptionsItemSelected（）没有被调用时，我点击主页按钮。 所以我无法通过按主页按钮取消搜索。 我尝试了几种不同的方式来在主页按钮上注册点击监听器，但它们不起作用。
最终我发现我的ActionBarDrawerToggle干扰了事情，所以我将它删除了。 这个听众然后开始工作：
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// toolbarHomeButtonAnimating is a boolean that is initialized as false. It's used to stop the user pressing the home button while it is animating and breaking things.
if (!toolbarHomeButtonAnimating) {
// Here you'll want to check if you have a search query set, if you don't then hide the search box.
// My main fragment handles this stuff, so I call its methods.
FragmentManager fragmentManager = getFragmentManager();
final Fragment fragment = fragmentManager.findFragmentById(R.id.container);
if (fragment != null && fragment instanceof MainListFragment) {
if (((MainListFragment) fragment).hasSearchQuery() || searchContainer.getVisibility() == View.VISIBLE) {
displaySearchView(false);
return;
}
}
}
if (mDrawerLayout.isDrawerOpen(findViewById(R.id.navigation_drawer)))
mDrawerLayout.closeDrawer(findViewById(R.id.navigation_drawer));
else
mDrawerLayout.openDrawer(findViewById(R.id.navigation_drawer));
}
});
所以我现在可以使用主页按钮取消搜索，但我无法按后退按钮取消它。 所以我将这添加到onBackPressed（）中：
FragmentManager fragmentManager = getFragmentManager();
final Fragment mainFragment = fragmentManager.findFragmentById(R.id.container);
if (mainFragment != null && mainFragment instanceof MainListFragment) {
if (((MainListFragment) mainFragment).hasSearchQuery() || searchContainer.getVisibility() == View.VISIBLE) {
displaySearchView(false);
return;
}
}
我创建了这个方法来切换EditText和菜单项的可见性：
public void displaySearchView(boolean visible) {
if (visible) {
// Stops user from being able to open drawer while searching
mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
// Hide search button, display EditText
menu.findItem(R.id.action_search).setVisible(false);
searchContainer.setVisibility(View.VISIBLE);
// Animate the home icon to the back arrow
toggleActionBarIcon(ActionDrawableState.ARROW, mDrawerToggle, true);
// Shift focus to the search EditText
toolbarSearchView.requestFocus();
// Pop up the soft keyboard
new Handler().postDelayed(new Runnable() {
public void run() {
toolbarSearchView.dispatchTouchEvent(MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), MotionEvent.ACTION_DOWN, 0, 0, 0));
toolbarSearchView.dispatchTouchEvent(MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), MotionEvent.ACTION_UP, 0, 0, 0));
}
}, 200);
} else {
// Allows user to open drawer again
mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
// Hide the EditText and put the search button back on the Toolbar.
// This sometimes fails when it isn't postDelayed(), don't know why.
toolbarSearchView.postDelayed(new Runnable() {
@Override
public void run() {
toolbarSearchView.setText("");
searchContainer.setVisibility(View.GONE);
menu.findItem(R.id.action_search).setVisible(true);
}
}, 200);
// Turn the home button back into a drawer icon
toggleActionBarIcon(ActionDrawableState.BURGER, mDrawerToggle, true);
// Hide the keyboard because the search box has been hidden
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(toolbarSearchView.getWindowToken(), 0);
}
}
我需要一种方法来切换工具栏上的抽屉图标和后退按钮之间的主页按钮。 我最终在这个SO答案中找到了下面的方法。 尽管我稍微修改了一下，以便对我更有意义：
private enum ActionDrawableState {
BURGER, ARROW
}
/**
* Modified version of this, https://stackoverflow.com/a/26836272/1692770<br>
* I flipped the start offset around for the animations because it seemed like it was the wrong way around to me.<br>
* I also added a listener to the animation so I can find out when the home button has finished rotating.
*/
private void toggleActionBarIcon(final ActionDrawableState state, final ActionBarDrawerToggle toggle, boolean animate) {
if (animate) {
float start = state == ActionDrawableState.BURGER ? 1.0f : 0f;
float end = Math.abs(start - 1);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
ValueAnimator offsetAnimator = ValueAnimator.ofFloat(start, end);
offsetAnimator.setDuration(300);
offsetAnimator.setInterpolator(new AccelerateDecelerateInterpolator());
offsetAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
float offset = (Float) animation.getAnimatedValue();
toggle.onDrawerSlide(null, offset);
}
});
offsetAnimator.addListener(new Animator.AnimatorListener() {
@Override
public void onAnimationStart(Animator animation) {
}
@Override
public void onAnimationEnd(Animator animation) {
toolbarHomeButtonAnimating = false;
}
@Override
public void onAnimationCancel(Animator animation) {
}
@Override
public void onAnimationRepeat(Animator animation) {
}
});
toolbarHomeButtonAnimating = true;
offsetAnimator.start();
}
} else {
if (state == ActionDrawableState.BURGER) {
toggle.onDrawerClosed(null);
} else {
toggle.onDrawerOpened(null);
}
}
}
这有效，我设法找出了一些我一路上发现的错误。 我不认为它是100％，但它对我来说足够好。
编辑：如果你想添加在XML而不是Java的搜索视图做到这一点：
toolbar.xml：
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/toolbar"
contentInsetLeft="72dp"
contentInsetStart="72dp"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:elevation="4dp"
android:minHeight="?attr/actionBarSize"
app:contentInsetLeft="72dp"
app:contentInsetStart="72dp"
app:popupTheme="@style/ActionBarPopupThemeOverlay"
app:theme="@style/ActionBarThemeOverlay">
<LinearLayout
android:id="@+id/search_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_vertical"
android:orientation="horizontal">
<EditText
android:id="@+id/search_view"
android:layout_width="0dp"
android:layout_height="?attr/actionBarSize"
android:layout_weight="1"
android:background="@android:color/transparent"
android:gravity="center_vertical"
android:hint="Search"
android:imeOptions="actionSearch"
android:inputType="text"
android:maxLines="1"
android:paddingLeft="2dp"
android:singleLine="true"
android:textColor="#ffffff"
android:textColorHint="#b3ffffff" />
<ImageView
android:id="@+id/search_clear"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:paddingLeft="16dp"
android:paddingRight="16dp"
android:src="@drawable/ic_close_white_24dp" />
</LinearLayout>
</android.support.v7.widget.Toolbar>
你Activity的onCreate（）：
searchContainer = findViewById(R.id.search_container);
toolbarSearchView = (EditText) findViewById(R.id.search_view);
searchClearButton = (ImageView) findViewById(R.id.search_clear);
// Setup search container view
try {
// Set cursor colour to white
// https://stackoverflow.com/a/26544231/1692770
// https://github.com/android/platform_frameworks_base/blob/kitkat-release/core/java/android/widget/TextView.java#L562-564
Field f = TextView.class.getDeclaredField("mCursorDrawableRes");
f.setAccessible(true);
f.set(toolbarSearchView, R.drawable.edittext_whitecursor);
} catch (Exception ignored) {
}
// Search text changed listener
toolbarSearchView.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
Fragment mainFragment = getFragmentManager().findFragmentById(R.id.container);
if (mainFragment != null && mainFragment instanceof MainListFragment) {
((MainListFragment) mainFragment).search(s.toString());
}
}
@Override
public void afterTextChanged(Editable s) {
}
});
// Clear search text when clear button is tapped
searchClearButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
toolbarSearchView.setText("");
}
});
// Hide the search view
searchContainer.setVisibility(View.GONE);
我知道它是一个古老的线索，但仍然发布我刚刚制作的图书馆。 希望这可能有助于某人。
https://github.com/Shahroz16/material-searchview
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