仿淘宝搜索 流式布局,搜索记录 清除

先上图  :



代码如下  注释的很清楚了:

 1自定义viewgroup:
public class FlowLayout extends ViewGroup {

public FlowLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}

public FlowLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}

public FlowLayout(Context context) {
this(context, null);
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

int sizeWidth = MeasureSpec.getSize(widthMeasureSpec);
int modeWidth = MeasureSpec.getMode(widthMeasureSpec);
int sizeHeight = MeasureSpec.getSize(heightMeasureSpec);
int modeHeight = MeasureSpec.getMode(heightMeasureSpec);

// 如果是warp_content情况下，记录宽和高
int width = 0;
int height = 0;

// 记录每一行的宽度与高度
int lineWidth = 0;
int lineHeight = 0;

// 得到内部元素的个数
int cCount = getChildCount();

for (int i = 0; i < cCount; i++) {
// 通过索引拿到每一个子view
View child = getChildAt(i);
// 测量子View的宽和高,系统提供的measureChild
measureChild(child, widthMeasureSpec, heightMeasureSpec);
// 得到LayoutParams
MarginLayoutParams lp = (MarginLayoutParams) child
.getLayoutParams();

// 子View占据的宽度
int childWidth = child.getMeasuredWidth() + lp.leftMargin
+ lp.rightMargin;
// 子View占据的高度
int childHeight = child.getMeasuredHeight() + lp.topMargin
+ lp.bottomMargin;

// 换行 判断 当前的宽度大于 开辟新行
if (lineWidth + childWidth > sizeWidth - getPaddingLeft() - getPaddingRight()) {
// 对比得到最大的宽度
width = Math.max(width, lineWidth);
// 重置lineWidth
lineWidth = childWidth;
// 记录行高
height += lineHeight;
lineHeight = childHeight;
} else
// 未换行
{
// 叠加行宽
lineWidth += childWidth;
// 得到当前行最大的高度
lineHeight = Math.max(lineHeight, childHeight);
}
// 特殊情况,最后一个控件
if (i == cCount - 1) {
width = Math.max(lineWidth, width);
height += lineHeight;
}
}
setMeasuredDimension(
modeWidth == MeasureSpec.EXACTLY ? sizeWidth : width + getPaddingLeft() + getPaddingRight(),
modeHeight == MeasureSpec.EXACTLY ? sizeHeight : height + getPaddingTop() + getPaddingBottom()//exactly
);

}

/**
* 存储所有的View
*/
private List<List<View>> mAllViews = new ArrayList<List<View>>();
/**
* 每一行的高度
*/
private List<Integer> mLineHeight = new ArrayList<Integer>();

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
mAllViews.clear();
mLineHeight.clear();

// 当前ViewGroup的宽度
int width = getWidth();

int lineWidth = 0;
int lineHeight = 0;

// 存放每一行的子view
List<View> lineViews = new ArrayList<View>();

int cCount = getChildCount();

for (int i = 0; i < cCount; i++) {
View child = getChildAt(i);
MarginLayoutParams lp = (MarginLayoutParams) child
.getLayoutParams();

int childWidth = child.getMeasuredWidth();
int childHeight = child.getMeasuredHeight();

// 如果需要换行
if (childWidth + lineWidth + lp.leftMargin + lp.rightMargin > width - getPaddingLeft() - getPaddingRight()) {
// 记录LineHeight
mLineHeight.add(lineHeight);
// 记录当前行的Views
mAllViews.add(lineViews);

// 重置我们的行宽和行高
lineWidth = 0;
lineHeight = childHeight + lp.topMargin + lp.bottomMargin;
// 重置我们的View集合
lineViews = new ArrayList<View>();
}
lineWidth += childWidth + lp.leftMargin + lp.rightMargin;
lineHeight = Math.max(lineHeight, childHeight + lp.topMargin
+ lp.bottomMargin);
lineViews.add(child);

}// for end
// 处理最后一行
mLineHeight.add(lineHeight);
mAllViews.add(lineViews);

// 设置子View的位置

int left = getPaddingLeft();
int top = getPaddingTop();

// 行数
int lineNum = mAllViews.size();

for (int i = 0; i < lineNum; i++) {
// 当前行的所有的View
lineViews = mAllViews.get(i);
lineHeight = mLineHeight.get(i);

for (int j = 0; j < lineViews.size(); j++) {
View child = lineViews.get(j);
// 判断child的状态
if (child.getVisibility() == View.GONE) {
continue;
}

MarginLayoutParams lp = (MarginLayoutParams) child
.getLayoutParams();

int lc = left + lp.leftMargin;
int tc = top + lp.topMargin;
int rc = lc + child.getMeasuredWidth();
int bc = tc + child.getMeasuredHeight();

// 为子View进行布局
child.layout(lc, tc, rc, bc);

left += child.getMeasuredWidth() + lp.leftMargin
+ lp.rightMargin;
}
left = getPaddingLeft();
top += lineHeight;
}

}

/**
* 与当前ViewGroup对应的LayoutParams
*/
@Override
public LayoutParams generateLayoutParams(AttributeSet attrs) {
return new MarginLayoutParams(getContext(), attrs);
}

}
2,mainActivity.java:
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private FlowLayout mFlowLayout;
private LayoutInflater mInflater;
private String[] mVals = new String[]{"Go","Java", "iOS", "PHP", "Python",
"Mac OS", "Android","JavaScript", "Objective-C",
"Groovy", "Pascal", "Ruby", "Go", "Swift"};//数据模拟，实际应从网络获取此数据

/************
* 以上为流式标签相关
************/
public static final String EXTRA_KEY_TYPE = "extra_key_type";
public static final String EXTRA_KEY_KEYWORD = "extra_key_keyword";
public static final String KEY_SEARCH_HISTORY_KEYWORD = "key_search_history_keyword";
private SharedPreferences mPref;//使用SharedPreferences记录搜索历史
private String mType;
private EditText input;
private Button btn_search;
private List<String> mHistoryKeywords;//记录文本
private ArrayAdapter<String> mArrAdapter;//搜索历史适配器
private LinearLayout mSearchHistoryLl;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initFlowView();

initHistoryView();
}

private void initFlowView() {
mInflater = LayoutInflater.from(this);
mFlowLayout = (FlowLayout) findViewById(R.id.flowlayout);
initData();
}

/**
* 将数据放入流式布局
*/
private void initData() {
for (int i = 0; i < mVals.length; i++) {
TextView tv = (TextView) mInflater.inflate(
R.layout.search_lable_tv, mFlowLayout, false);
tv.setText(mVals[i]);
final String str = tv.getText().toString();
//点击事件
tv.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//加入搜索历史纪录记录
Toast.makeText(MainActivity.this, str, Toast.LENGTH_LONG).show();
}
});
mFlowLayout.addView(tv);
}
}

/************
* 以上为流式标签相关
************/

private void initHistoryView() {
input = (EditText) findViewById(R.id.et_input);
btn_search = (Button) findViewById(R.id.btn_search);
btn_search.setOnClickListener(this);

mPref = getSharedPreferences("input", Activity.MODE_PRIVATE);
mType = getIntent().getStringExtra(EXTRA_KEY_TYPE);
String keyword = getIntent().getStringExtra(EXTRA_KEY_KEYWORD);
if (!TextUtils.isEmpty(keyword)) {
input.setText(keyword);
}
mHistoryKeywords = new ArrayList<String>();
input = (EditText) findViewById(R.id.et_input);

input.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) {
if (s.length() == 0) {
if (mHistoryKeywords.size() > 0) {
mSearchHistoryLl.setVisibility(View.VISIBLE);
} else {
mSearchHistoryLl.setVisibility(View.GONE);
}
} else {
mSearchHistoryLl.setVisibility(View.GONE);
}
}

@Override
public void afterTextChanged(Editable s) {

}
});
initSearchHistory();
}

/**
* 初始化搜索历史记录
*/
public void initSearchHistory() {
mSearchHistoryLl = (LinearLayout) findViewById(R.id.search_history_ll);
ListView listView = (ListView) findViewById(R.id.search_history_lv);
findViewById(R.id.clear_history_btn).setOnClickListener(this);
String history = mPref.getString(KEY_SEARCH_HISTORY_KEYWORD, "");
if (!TextUtils.isEmpty(history)) {
List<String> list = new ArrayList<String>();
for (Object o : history.split(",")) {
list.add((String) o);
}
mHistoryKeywords = list;
}
if (mHistoryKeywords.size() > 0) {
mSearchHistoryLl.setVisibility(View.VISIBLE);
} else {
mSearchHistoryLl.setVisibility(View.GONE);
}
mArrAdapter = new ArrayAdapter<String>(this, R.layout.item_search_history, mHistoryKeywords);
listView.setAdapter(mArrAdapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
input.setText(mHistoryKeywords.get(i));
mSearchHistoryLl.setVisibility(View.GONE);
}
});
mArrAdapter.notifyDataSetChanged();
}

/**
* 储存搜索历史
*/
public void save() {
String text = input.getText().toString();
String oldText = mPref.getString(KEY_SEARCH_HISTORY_KEYWORD, "");
Log.e("tag", "" + oldText);
Log.e("Tag", "" + text);
Log.e("Tag", "" + oldText.contains(text));
if (!TextUtils.isEmpty(text) && !(oldText.contains(text))) {
if (mHistoryKeywords.size() > 5) {
//最多保存条数
return;
}
SharedPreferences.Editor editor = mPref.edit();
editor.putString(KEY_SEARCH_HISTORY_KEYWORD, text + "," + oldText);
editor.commit();
mHistoryKeywords.add(0, text);
}
mArrAdapter.notifyDataSetChanged();
}

/**
* 清除历史纪录
*/
public void cleanHistory() {
mPref = getSharedPreferences("input", MODE_PRIVATE);
SharedPreferences.Editor editor = mPref.edit();
editor.remove(KEY_SEARCH_HISTORY_KEYWORD).commit();
mHistoryKeywords.clear();
mArrAdapter.notifyDataSetChanged();
mSearchHistoryLl.setVisibility(View.GONE);
Toast.makeText(MainActivity.this, "清楚搜索历史成功", Toast.LENGTH_LONG).show();
}

@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btn_search:
String keywords = input.getText().toString();
if (!TextUtils.isEmpty(keywords)) {
Toast.makeText(MainActivity.this, keywords + "save成功", Toast.LENGTH_LONG).show();
save();
} else {
Toast.makeText(MainActivity.this, "请输入搜索内容", Toast.LENGTH_LONG).show();
}
break;
case R.id.clear_history_btn:
cleanHistory();
break;
default:
break;
}

}
}

3.activity布局 :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="10dp"
>

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:orientation="horizontal">

<EditText
android:id="@+id/et_input"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="1"
android:hint="请输入你想搜索的内容"
android:maxLines="1"
android:paddingLeft="5dp"
android:paddingRight="5dp"/>

<Button
android:id="@+id/btn_search"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:text="搜索"/>
</LinearLayout>

<LinearLayout
android:id="@+id/layout_notice"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">

<com.v2.v2conferencesdkdemo.myapplication.FlowLayout
android:id="@+id/flowlayout"
android:layout_width="match_parent"
android:layout_height="wrap_content">

</com.v2.v2conferencesdkdemo.myapplication.FlowLayout>

<LinearLayout
android:id="@+id/search_history_ll"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:visibility="gone">

<TextView
android:id="@+id/contentTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingBottom="4dp"
android:paddingLeft="10dp"
android:paddingTop="4dp"
android:text="历史搜索"
android:textSize="12sp"/>

<ListView
android:id="@+id/search_history_lv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:divider="#fff"
android:dividerHeight="0.5dp"
android:listSelector="@color/colorPrimaryDark">
</ListView>

<Button
android:id="@+id/clear_history_btn"
android:layout_width="210dp"
android:layout_height="38dp"
android:layout_gravity="center"
android:layout_marginTop="5dp"
android:background="@color/colorPrimaryDark"
android:text="清除历史搜索记录"
android:textSize="14sp"/>
</LinearLayout>
</LinearLayout>
</LinearLayout>
4.item_search_history.xml 布局
<?xml version="1.0" encoding="utf-8"?>
<TextView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/contentTextView"
android:layout_width="match_parent"
android:layout_height="51dp"
android:paddingLeft="10dp"
android:gravity="center_vertical"
android:background="@color/colorPrimary"
android:textSize="14sp"
android:textColor="#ff403b37"/>
5.search_lable_tv.xml布局:
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:background="@drawable/search_bg"
android:paddingBottom="10dp"
android:paddingLeft="20dp"
android:paddingRight="20dp"
android:paddingTop="10dp"
android:text="Helloworld"
android:textColor="#3f3e3e"
android:textSize="14sp">
</TextView>
6.drawable 文件:search_bg.xml
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >

<item >
<shape android:shape="rectangle" >
<solid android:color="#fff"/>
<stroke
android:width="1dp"
android:color="@color/gray_deep"/>
<corners android:radius="3dp"/>
<padding android:left="1dp" android:top="1dp" android:right="1dp" android:bottom="1dp" />
</shape>
</item>
</layer-list>
好了  以上都是全的了 ,直接复制粘贴就可以用了