我创建了recycerview，这个recycerview显示了Person图像，人名和+按钮，当我按下+按钮更改按钮图像时为true.and recycerview bottom one button按钮点击所有数据显示下一个活动。
我的适配器
public class BuildCustomAdapter extends RecyclerView.Adapter<BuildCustomAdapter.MyViewHolder> implements Filterable {
private List<People> peopleList;
private List<People> peopleListCopy;
private ItemFilter mFilter = new ItemFilter();
public BuildCustomAdapter(List<People> buildList) {
this.peopleList = buildList;
this.peopleListCopy = new ArrayList<>();
peopleListCopy.addAll(buildList);
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.build_list_row, parent, false);
return new MyViewHolder(itemView);
}
@Override
public void onBindViewHolder(final MyViewHolder holder, final int position) {
People people = peopleList.get(position);
byte[] decodedString = Base64.decode(people.getPeopleImage(), Base64.DEFAULT);
Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);
holder.ivPeopleImage.setImageBitmap(decodedByte);
holder.tvPersonName.setText(people.getPeopleName());
holder.button.setSelected(people.isSelected());
holder.button.setOnClickListener(new onSelectListener(position));
}
@Override
public int getItemCount() {
return peopleList.size();
}
@Override
public Filter getFilter() {
if (mFilter == null) {
mFilter = new ItemFilter();
}
return mFilter;
}
public class MyViewHolder extends RecyclerView.ViewHolder {
// public ImageView ivPeopleImage;
public TextView tvPersonName;
public Button button;
public CircularImageView ivPeopleImage;
public MyViewHolder(View itemView) {
super(itemView);
ivPeopleImage = (CircularImageView) itemView.findViewById(R.id.ivPerson);
tvPersonName = (TextView) itemView.findViewById(R.id.tvPersonName);
button = (Button) itemView.findViewById(R.id.addbn);
}
}
private class ItemFilter extends Filter {
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
if (constraint != null && constraint.length() > 0) {
List<People> filterList = new ArrayList<>();
for (int i = 0; i < peopleListCopy.size(); i++) {
if ((peopleListCopy.get(i).getPeopleName().toUpperCase())
.contains(constraint.toString().toUpperCase())) {
People peopleName = peopleListCopy.get(i);
filterList.add(peopleName);
}
}
results.count = filterList.size();
results.values = filterList;
} else {
results.count = peopleListCopy.size();
results.values = peopleListCopy;
}
return results;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
peopleList = (List<People>) results.values;
notifyDataSetChanged();
}
}
private class onSelectListener implements View.OnClickListener {
int mPosition;
public onSelectListener(int position) {
mPosition = position;
}
@Override
public void onClick(View view) {
view.setSelected(!view.isSelected());
People people = peopleList.get(mPosition);
people.setSelected(!people.isSelected());
notifyDataSetChanged();
}
}
活动
public class BulidActivity extends AppCompatActivity {
private List<People> peopleList = new ArrayList<>();
private List<People> peopleListCopy = new ArrayList<>();
private RecyclerView recyclerView;
private BuildCustomAdapter buildCustomAdapter;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_bulid);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
BuildData();
peopleListCopy.addAll(peopleList);
recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
buildCustomAdapter = new BuildCustomAdapter(peopleList);
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());
recyclerView.setLayoutManager(mLayoutManager);
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.setAdapter(buildCustomAdapter);
AddTxt();
BtnBuildNow();
}
private void BtnBuildNow() {
Button btnnuildnow = (Button) findViewById(R.id.btn_build_now);
btnnuildnow.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(BulidActivity.this, AlertList.class);
startActivity(intent);
}
});
}
private void AddTxt() {
EditText editTxt = (EditText) findViewById(R.id.etSearch);
editTxt.setTextColor(Color.WHITE);
editTxt.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
v.setFocusable(true);
v.setFocusableInTouchMode(true);
return false;
}
});
editTxt.addTextChangedListener(new TextWatcher() {
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (s.length() <= 0) {
peopleList.clear();
peopleList.addAll(peopleListCopy);
recyclerView.setAdapter(null);
buildCustomAdapter = new BuildCustomAdapter(peopleList);
recyclerView.setAdapter(buildCustomAdapter);
} else {
buildCustomAdapter.getFilter().filter(s.toString());
}
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void afterTextChanged(Editable s) {
}
});
}
private List<People> BuildData() {
DataBaseHelper db = new DataBaseHelper(getApplicationContext());
try {
db.createDataBase();
} catch (IOException ioe) {
throw new Error("Unable to create database");
}
if (db.open()) {
peopleList = db.getPeople();
}
return peopleList;
}
模型类
public class People implements Serializable {
private String peopleImage;
private String peopleName;
private boolean selected;
public void setPeopleName(String peopleName) {
this.peopleName = peopleName;
}
public String getPeopleName() {
return peopleName;
}
public void setPeopleImage(String peopleImage) {
this.peopleImage = peopleImage;
}
public String getPeopleImage() {
return peopleImage;
}
public boolean isSelected() {
return selected;
}
public void setSelected(boolean selected) {
this.selected = selected;
}
DatabaseHelper.class
public class DataBaseHelper extends SQLiteOpenHelper {
private static final String DB_PATH = "/data/data/databasename/databases/";
private static final String DB_NAME = "alertme.db";
private final String TABLE_PEOPLE = "people";
private final String TABLE_CATEGORY = "category";
private final String CATEGORY_NAME = "name";
private final String ID = "id";
private final String CATEGORY_ID = "category_id";
private final String PEOPLE_IMAGE = "image";
private final String PEOPLE_NAME = "name";
private SQLiteDatabase myDataBase;
private final Context myContext;
public DataBaseHelper(Context context) {
super(context, DB_NAME, null, 1);
this.myContext = context;
}
public void createDataBase() throws IOException {
boolean dbExist = checkDataBase();
if (dbExist) {
} else {
this.getReadableDatabase();
try {
copyDataBase();
} catch (IOException e) {
throw new Error("Error copying database");
}
}
}
private boolean checkDataBase() {
SQLiteDatabase checkDB = null;
try {
String myPath = DB_PATH + DB_NAME;
checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
} catch (SQLiteException e) {
}
if (checkDB != null) {
checkDB.close();
}
return checkDB != null ? true : false;
}
private void copyDataBase() throws IOException {
InputStream myInput = myContext.getAssets().open(DB_NAME);
String outFileName = DB_PATH + DB_NAME;
OutputStream myOutput = new FileOutputStream(outFileName);
byte[] buffer = new byte[1024];
int length;
while ((length = myInput.read(buffer)) > 0) {
myOutput.write(buffer, 0, length);
}
myOutput.flush();
myOutput.close();
myInput.close();
}
public boolean open() {
try {
String myPath = DB_PATH + DB_NAME;
myDataBase = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READWRITE);
return true;
} catch (SQLException sqle) {
myDataBase = null;
return false;
}
}
public List<People> getPeople(String category_id) {
List<People> peoples = new ArrayList<>();
try {
SQLiteDatabase db = SQLiteDatabase.openDatabase(DB_PATH + DB_NAME, null, SQLiteDatabase.OPEN_READWRITE);
Cursor cursor = db.rawQuery("select * from people where category_id = " + category_id, null);
while (cursor.moveToNext()) {
String peopleName = cursor.getString(cursor.getColumnIndex(PEOPLE_NAME));
String peopleImage = cursor.getString(cursor.getColumnIndex(PEOPLE_IMAGE));
People people = new People();
people.setPeopleName(peopleName);
people.setPeopleImage(peopleImage);
peoples.add(people);
}
} catch (Exception e) {
Log.d("DB", e.getMessage());
}
return peoples;
}
public List<Category> getCategory() {
List<Category> categoryList = new ArrayList<>();
try {
String query = " SELECT * FROM " + TABLE_CATEGORY;
SQLiteDatabase db = SQLiteDatabase.openDatabase(DB_PATH + DB_NAME, null, SQLiteDatabase.OPEN_READWRITE);
Cursor cursor = db.rawQuery(query, null);
while (cursor.moveToNext()) {
int categoryID = cursor.getInt(cursor.getColumnIndex(ID));
String categoryName = cursor.getString(cursor.getColumnIndex(CATEGORY_NAME));
Category category = new Category();
category.setId(categoryID);
category.setCategoryName(categoryName);
categoryList.add(category);
}
} catch (Exception e) {
Log.d("DB", e.getMessage());
}
return categoryList;
}
@Override
public synchronized void close() {
if (myDataBase != null)
myDataBase.close();
super.close();
}
@Override
public void onCreate(SQLiteDatabase db) {
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
答案 0 :(得分：0)
在下面的方法
中添加意图 holder.button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
build.setSelected(!build.isSelected());
if (build.isSelected()) {
holder.button.setBackgroundResource(R.drawable.selected_true_icon_new);
Intent intent = new Intent(context, youractivity.class)
intenet.putExtra("key","value");
context.startActivity(intent);
} else
holder.button.setBackgroundResource(R.drawable.add_button_icon);
}
});
答案 1 :(得分：0)
您注册ViewHolder上的点击事件的巨大错误！你将获得与实际不同的位置，因为当android使用notifyItemMoved时，不会调用viewBindHolder，而是你的位置错误。
并且在click侦听器实现中，您应该将Intent传递给您的数据
答案 2 :(得分：0)
首先，您应该在Serializable模型类中实现Build接口，如下所示： -
public class Build implements Serializable{
//Content will be as it is
}
像这样更改clickListener： -
holder.button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
build.setSelected(!build.isSelected());
if (build.isSelected()) {
holder.button.setBackgroundResource(R.drawable.selected_true_icon_new);
Intent intent = new Intent(context, youractivity.class)
intenet.putExtra("build",build);
context.startActivity(intent);
} else
holder.button.setBackgroundResource(R.drawable.add_button_icon);
}
});
在接收活动的onCreate方法中写下： -
Build build = (Build) getIntent().getSerializableExtra("build");