android 自己定義ViewGroup實現可記載並呈現選擇的ListView
阿新 • • 發佈：2017-07-05
uml tla asc tdi long getmenu selected support appcompat
轉載請註明出處：王亟亟的大牛之路
之前也做過一些用TextView之類的記錄ListView選項的東西。可是總認為好難看。發現個不錯的實現就貼給大家。
項目文件夾
執行效果：
自己定義視圖：
@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
public class FlowLayout extends ViewGroup {
private int mGravity = (isIcs() ? Gravity.START : Gravity.LEFT) | Gravity.TOP;
private 分析：
這部分主要是呈現被選項的實現。伸手黨能夠無視
對象：
public class Filter_Object {
public String mName ;
public boolean mIsSelected ;
}
分析：填充是否被選，以及listView每一行的顯示內容
MainActivity:
public class MainActivity extends AppCompatActivity {
private ListView mListView;
private ArrayList<Filter_Object> mArrFilter;
private ScrollView mScrollViewFilter;
private Filter_Adapter mFilter_Adapter ;
private FlowLayout mFlowLayoutFilter ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
getWindow().setStatusBarColor(getResources().getColor(R.color.themecolor));
}
mArrFilter = new ArrayList<>();
String[] strArr = getResources().getStringArray(R.array.city);
int lengthOfstrArr = strArr.length;
for (int i = 0; i < lengthOfstrArr; i++) {
Filter_Object filter_object = new Filter_Object();
filter_object.mName = strArr[i];
filter_object.mIsSelected = false;
mArrFilter.add(filter_object);
}
getSupportActionBar().setDisplayShowTitleEnabled(true);
getSupportActionBar().setTitle(getString(R.string.app_name));
mListView = (ListView) findViewById(R.id.listViewFilter);
mScrollViewFilter = (ScrollView)findViewById(R.id.scrollViewFilter);
//放置被選項的布局
mFlowLayoutFilter = (FlowLayout)findViewById(R.id.flowLayout);
mFilter_Adapter = new Filter_Adapter(mArrFilter);
mListView.setAdapter(mFilter_Adapter);
}
public void addFilterTag() {
final ArrayList<Filter_Object> arrFilterSelected = new ArrayList<>();
mFlowLayoutFilter.removeAllViews();
int length = mArrFilter.size();
boolean isSelected = false;
for (int i = 0; i < length; i++) {
Filter_Object fil = mArrFilter.get(i);
if (fil.mIsSelected) {
isSelected = true;
arrFilterSelected.add(fil);
}
}
if (isSelected) {
mScrollViewFilter.setVisibility(View.VISIBLE);
} else {
mScrollViewFilter.setVisibility(View.GONE);
}
int size = arrFilterSelected.size();
LayoutInflater layoutInflater = (LayoutInflater)
this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
for (int i = 0; i < size; i++) {
View view = layoutInflater.inflate(R.layout.filter_tag_edit, null);
TextView tv = (TextView) view.findViewById(R.id.tvTag);
LinearLayout linClose = (LinearLayout) view.findViewById(R.id.linClose);
final Filter_Object filter_object = arrFilterSelected.get(i);
linClose.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//showToast(filter_object.name);
int innerSize = mArrFilter.size();
for (int j = 0; j < innerSize; j++) {
Filter_Object mFilter_Object = mArrFilter.get(j);
if (mFilter_Object.mName.equalsIgnoreCase(filter_object.mName)) {
mFilter_Object.mIsSelected = false;
}
}
addFilterTag();
mFilter_Adapter.updateListView(mArrFilter);
}
});
tv.setText(filter_object.mName);
int color = getResources().getColor(R.color.themecolor);
View newView = view;
newView.setBackgroundColor(color);
FlowLayout.LayoutParams params = new FlowLayout.LayoutParams(FlowLayout.LayoutParams.WRAP_CONTENT, FlowLayout.LayoutParams.WRAP_CONTENT);
params.rightMargin = 10;
params.topMargin = 5;
params.leftMargin = 10;
params.bottomMargin = 5;
newView.setLayoutParams(params);
mFlowLayoutFilter.addView(newView);
}
}
public class Filter_Adapter extends BaseAdapter {
ArrayList<Filter_Object> arrMenu;
public Filter_Adapter(ArrayList<Filter_Object> arrOptions) {
this.arrMenu = arrOptions;
}
public void updateListView(ArrayList<Filter_Object> mArray) {
this.arrMenu = mArray;
notifyDataSetChanged();
}
@Override
public int getCount() {
return this.arrMenu.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if (convertView == null) {
convertView = getLayoutInflater().inflate(R.layout.filter_list_item, null);
viewHolder = new ViewHolder();
viewHolder.mTtvName = (TextView) convertView.findViewById(R.id.tvName);
viewHolder.mTvSelected = (TextView) convertView.findViewById(R.id.tvSelected);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
final Filter_Object mService_Object = arrMenu.get(position);
viewHolder.mTtvName.setText(mService_Object.mName);
if (mService_Object.mIsSelected) {
viewHolder.mTvSelected.setVisibility(View.VISIBLE);
} else {
viewHolder.mTvSelected.setVisibility(View.INVISIBLE);
}
convertView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mService_Object.mIsSelected = !mService_Object.mIsSelected;
mScrollViewFilter.setVisibility(View.VISIBLE);
addFilterTag();
notifyDataSetChanged();
}
});
return convertView;
}
public class ViewHolder {
TextView mTtvName, mTvSelected;
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
// getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}分析：
層次非常分明，從填充本地數據–>轉加載ListView–>附加邏輯–>呈現。等流程思路非常清晰，可讀性非常強。
詳細使用，能夠看源代碼。一目了然。
源代碼地址：http://yunpan.cn/cdbbFUd8rLFmJ 訪問password af07
android 自己定義ViewGroup實現可記載並呈現選擇的ListView