我有一个自定义textview如下
public class TaskTitleView extends TextView {
public static final int NORMAL = 0;
public static final int DONE = 1;
public static final int OVERDUE = 2;
private int mState;
public TaskTitleView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
public TaskTitleView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public TaskTitleView(Context context) {
super(context);
}
/**
* Return the current display state of this view.
*
* @return One of {@link #NORMAL}, {@link #DONE}, or {@link #OVERDUE}.
*/
public int getState() {
return mState;
}
/**
* Update the text display state of this view.
* Normal status shows black text. Overdue displays in red.
* Completed draws a strikethrough line on the text.
*
* @param state New state. One of {@link #NORMAL}, {@link #DONE}, or {@link #OVERDUE}.
*/
public void setState(int state) {
switch (state) {
case DONE:
setPaintFlags(Paint.STRIKE_THRU_TEXT_FLAG);
Log.i("vvv","vvvv");
setTextColor(ContextCompat.getColor(getContext(), R.color.black));
case NORMAL:
setPaintFlags(0);
setTextColor(ContextCompat.getColor(getContext(), R.color.black));
break;
case OVERDUE:
setPaintFlags(0);
setTextColor(ContextCompat.getColor(getContext(), R.color.red));
break;
default:
return;
}
mState = state;
}
}
在recyclerView适配器上，我做了类似这样的事情
public class TaskAdapter extends RecyclerView.Adapter<TaskAdapter.TaskHolder> {
/* Callback for list item click events */
public interface OnItemClickListener {
void onItemClick(View v, int position);
void onItemToggled(boolean active, int position);
}
/* ViewHolder for each task item */
public class TaskHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public TaskTitleView nameView;
public TextView dateView;
public ImageView priorityView;
public CheckBox checkBox;
public TaskHolder(View itemView) {
super(itemView);
nameView = (TaskTitleView) itemView.findViewById(R.id.text_description);
//nameView= new TaskTitleView(mContext);
dateView = (TextView) itemView.findViewById(R.id.text_date);
priorityView = (ImageView) itemView.findViewById(R.id.priority);
checkBox = (CheckBox) itemView.findViewById(R.id.checkbox);
itemView.setOnClickListener(this);
checkBox.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if (v == checkBox) {
completionToggled(this);
} else {
postItemClick(this);
}
}
}
private Cursor mCursor;
private OnItemClickListener mOnItemClickListener;
private Context mContext;
public TaskAdapter(Cursor cursor, Context context) {
mCursor = cursor;
mContext = context;
}
public void setOnItemClickListener(OnItemClickListener listener) {
mOnItemClickListener = listener;
}
private void completionToggled(TaskHolder holder) {
if (mOnItemClickListener != null) {
mOnItemClickListener.onItemToggled(holder.checkBox.isChecked(),holder.getAdapterPosition());
}
}
private void postItemClick(TaskHolder holder) {
if (mOnItemClickListener != null) {
int adapterPosition = holder.getAdapterPosition();
mCursor.moveToPosition(adapterPosition);
mOnItemClickListener.onItemClick(holder.itemView, Integer.parseInt(mCursor.getString(mCursor.getColumnIndex(DatabaseContract.TaskColumns._ID))));
Log.i("rrr",mCursor.getString(mCursor.getColumnIndex(DatabaseContract.TaskColumns._ID)));
}
}
@Override
public TaskHolder onCreateViewHolder(ViewGroup parent, int viewType) {
mContext = parent.getContext();
View itemView = LayoutInflater.from(mContext)
.inflate(R.layout.list_item_task, parent, false);
return new TaskHolder(itemView);
}
@Override
public void onBindViewHolder(TaskHolder holder, int position) {
Log.i("test", String.valueOf(position));
mCursor.moveToPosition(position);
holder.nameView.setText(mCursor.getString(mCursor.getColumnIndex(DatabaseContract.TaskColumns.DESCRIPTION)));
holder.nameView.setState(0);
if(mCursor.getLong(mCursor.getColumnIndex(DatabaseContract.TaskColumns.DUE_DATE))==Long.MAX_VALUE)
{
}
else {
CharSequence formatted = DateUtils.getRelativeTimeSpanString(mCursor.getLong(mCursor.getColumnIndex(DatabaseContract.TaskColumns.DUE_DATE)));
holder.dateView.setText(formatted);
}
if(mCursor.getString(mCursor.getColumnIndex(DatabaseContract.TaskColumns.IS_PRIORITY)).equals("0"))
{
holder.priorityView.setImageDrawable(mContext.getDrawable(R.drawable.ic_not_priority));
}
else
{
holder.priorityView.setImageDrawable(mContext.getDrawable(R.drawable.ic_priority));
}
if(mCursor.getString(mCursor.getColumnIndex(DatabaseContract.TaskColumns.IS_COMPLETE)).equals("1"))
{
holder.nameView.setState(1);
holder.checkBox.setChecked(true);
}
else
{
holder.nameView.setState(0);
holder.checkBox.setChecked(false);
}
}
@Override
public int getItemCount() {
return (mCursor != null) ? mCursor.getCount() : 0;
}
/**
* Retrieve a {@link Task} for the data at the given position.
*
* @param position Adapter item position.
*
* @return A new {@link Task} filled with the position's attributes.
*/
public Task getItem(int position) {
if (!mCursor.moveToPosition(position)) {
throw new IllegalStateException("Invalid item position requested");
}
return new Task(mCursor);
}
@Override
public long getItemId(int position) {
return getItem(position).id;
}
public void swapCursor(Cursor cursor) {
if (mCursor != null) {
mCursor.close();
}
mCursor = cursor;
notifyDataSetChanged();
}
}
什么是错的，当我改变状态时，它应该改变。但我什么也没看到。甚至不是文字。 请帮忙。 谢谢 .................................................. ......................... .........................................
答案 0 :(得分：0)
在自定义invalidate();上设置状态时，您可以添加TextView 。
public void setState(int state) {
switch (state) {
case DONE:
setPaintFlags(Paint.STRIKE_THRU_TEXT_FLAG);
Log.i("vvv","vvvv");
setTextColor(ContextCompat.getColor(getContext(), R.color.color_black));
case NORMAL:
setPaintFlags(0);
setTextColor(ContextCompat.getColor(getContext(), R.color.color_blue));
break;
case OVERDUE:
setPaintFlags(0);
setTextColor(ContextCompat.getColor(getContext(), R.color.color_red));
break;
default:
return;
}
mState = state;
// add here , to update
invalidate();
}
更改
@Override
public void onClick(View v) {
if (v == checkBox) {
completionToggled(this);
} else {
postItemClick(this);
}
}
到
@Override
public void onClick(View v) {
switch (v.getId()){
case R.id.checkbox:
completionToggled(this);
break;
default:
postItemClick(this);
break;
}
}
答案 1 :(得分：0)
试试这个
public class Textview_Bold extends TextView {
public Textview_Bold(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
public Textview_Bold(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public Textview_Bold(Context context) {
super(context);
init();
}
private void init() {
if (!isInEditMode()) {
Typeface tf = Typeface.createFromAsset(getContext().getAssets(), "Lato-Bold.ttf");
setTypeface(tf);
}
}
}
<强> XML
<yourpackage name.FontText.Textview_Bold
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#000"
android:text="Create Account"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
android:padding="5dp"
android:id="@+id/createaccount"
android:background="@drawable/buttonselector"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
答案 2 :(得分：0)
您需要更改customView生命周期中的属性，或者在覆盖的事件中使用func。
在您的情况下，请尝试按照下一步更新您的观点：
查看更新
从视图生命周期图中，您可能会注意到有两种方法可以引导视图重绘自身。 invalidate（）和requestLayout（）方法将帮助您创建交互式自定义视图，这可能会在运行时更改其外观。但为什么有两个？ invalidate（）方法用于简单重绘视图。例如，您的视图会更新其文本，颜色或触摸交互性。这意味着视图将再次调用onDraw（）方法来更新其状态。 requestLayout（）方法，正如您所看到的那样，只需从onMeasure（）方法生成视图更新。这意味着你需要它在你的视图更新后，它改变了它的大小，你需要再次测量它，以根据新的大小绘制它。
从这里开始：https://medium.com/@romandanylyk96/android-draw-a-custom-view-ef79fe2ff54b