java - 状态变化的颜色变化

Question

我正在制作一个关于休假管理的应用程序，我想让我的休假列表布局如图所示我想从数据库中更改状态更改时列表视图的颜色。现在我只是添加简单的文本视图来显示列表，但我想像图像一样修改它，如果你给我代码，它对我真的很有帮助。
这是我的 java 代码适配器：

@NonNull
@Override
public LeaveViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.leave_list, null);
    view.setLayoutParams(new RecyclerView.LayoutParams(RecyclerView.LayoutParams.MATCH_PARENT, RecyclerView.LayoutParams.WRAP_CONTENT));
    LeaveViewHolder viewHolder = new LeaveViewHolder(view);
    return viewHolder;
}

@Override
public void onBindViewHolder(@NonNull LeaveViewHolder holder, int position) {

    LeaveModel leave = leaveList.get(position);
    holder.tVFrom_date.setText("From:  " + leave.getFrom_date());
    holder.tVTo_date.setText("To:  " + leave.getTo_date());
    holder.tVStatus.setText("Status: " + leave.getLeavestatus());
    if (holder.tVStatus == null) {

    } else {

    }
}

@Override
public int getItemCount() {
    return leaveList.size();
}

public class LeaveViewHolder extends RecyclerView.ViewHolder  {
    protected TextView tVFrom_date, tVTo_date, tVStatus;
    public View container;

    public LeaveViewHolder(View itemView) {
        super(itemView);
        tVFrom_date = itemView.findViewById(R.id.tVFrom_date);
        tVTo_date = itemView.findViewById(R.id.tVTo_date);
        tVStatus = itemView.findViewById(R.id.tVStatus);

    }
}

这是我的 XML 布局：

<android.support.v7.widget.CardView 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    card_view:cardCornerRadius="5dp"
    card_view:cardElevation="5dp"
    card_view:cardPreventCornerOverlap="false"
    card_view:cardUseCompatPadding="true">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingEnd="6dp"
        android:paddingStart="6dp">

        <TextView
            android:id="@+id/tVFrom_date"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="5dp"
            android:textColor="@color/Black"/>

        <TextView
            android:id="@+id/tVTo_date"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/tVFrom_date"
            android:layout_marginTop="5dp"
            android:textColor="@color/Black"/>

        <TextView
            android:id="@+id/tVStatus"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/tVTo_date"
            android:layout_marginTop="5dp"
            android:textColor="@color/Red"
            android:textStyle="bold" />
    </RelativeLayout>
</android.support.v7.widget.CardView>

标签： javaandroidxmlandroid-layout

Answer 1

我在您的布局中添加了图像视图，因此更改此图像视图的颜色作为状态

<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
card_view:cardCornerRadius="5dp"
card_view:cardElevation="5dp"
card_view:cardPreventCornerOverlap="true"
card_view:cardUseCompatPadding="true">

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

    <ImageView
        android:id="@+id/img_LeaveAdapter_highlight"
        android:layout_width="8dp"
        android:layout_height="match_parent"
        android:background="@color/colorPrimary" />

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingEnd="6dp"
        android:paddingStart="6dp">

        <TextView
            android:id="@+id/tVFrom_date"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="5dp"
            android:textColor="@color/Black" />

        <TextView
            android:id="@+id/tVTo_date"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/tVFrom_date"
            android:layout_marginTop="5dp"
            android:textColor="@color/Black"

            />

        <TextView
            android:id="@+id/tVStatus"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/tVTo_date"
            android:layout_marginTop="5dp"
            android:textColor="@color/Red"
            android:textStyle="bold" />

    </RelativeLayout>
</LinearLayout>

我创建了适配器只是为了您的理解

public class LeaveAdapter extends RecyclerView.Adapter<LeaveAdapter.MyViewHolder> {
Activity activity;
ArrayList<LeaveModel> list;

public LeaveAdapter(Activity activity, ArrayList<LeaveModel> list) {
    this.activity = activity;
    this.list = list;
}

@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    View rootView = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_leaveadapter, parent, false);
    return new MyViewHolder(rootView);
}

@Override
public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {

    String leaveStatus = list.get(position).getLeaveStatus();
    if (leaveStatus.equals("Panding for approval")) {
        holder.img_LeaveAdapter_highlight.setBackgroundColor(ContextCompat.getColor(activity, R.color.Red));

    } else if (leaveStatus.equals("Approved")) {
        holder.img_LeaveAdapter_highlight.setBackgroundColor(ContextCompat.getColor(activity, R.color.Green));

    }
}

@Override
public int getItemCount() {
    return list.size();
}

public class MyViewHolder extends RecyclerView.ViewHolder {
    ImageView img_LeaveAdapter_highlight;

    public MyViewHolder(View itemView) {
        super(itemView);
        img_LeaveAdapter_highlight = itemView.findViewById(R.id.img_LeaveAdapter_highlight);
    }
}
}