Question

我需要在TextView上显示3个可绘制对象。我已经尝试过使用自定义视图，并且它可以工作。但是，随着我对LinearLayout的扩展，我无法直接在xml上使用TextView属性，如textColor，textSize等。可以做TextView的扩展吗？这是我的代码：

verified_component.xml：

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">

<TextView
    android:id="@+id/txtUserName"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textColor="@color/gray_333333"
    android:gravity="center_vertical"
    android:lines="1"
    android:maxWidth="200dp"
    android:textSize="16sp"
    android:ellipsize="end"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintEnd_toStartOf="@+id/iconVerified"
    app:layout_constraintHorizontal_chainStyle="spread"
    app:layout_constraintTop_toTopOf="parent"
    tools:text="Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. " />

<android.support.v7.widget.AppCompatImageView
    android:id="@+id/iconVerified"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginStart="6dp"
    app:layout_constraintBottom_toBottomOf="@+id/txtUserName"
    app:layout_constraintStart_toEndOf="@+id/txtUserName"
    app:layout_constraintEnd_toStartOf="@+id/iconOwner"
    app:layout_constraintTop_toTopOf="@+id/txtUserName"
    app:srcCompat="@drawable/verificado" />

<android.support.v7.widget.AppCompatImageView
    android:id="@+id/iconOwner"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginStart="8dp"
    app:layout_constraintBottom_toBottomOf="@+id/txtUserName"
    app:layout_constraintStart_toEndOf="@+id/iconVerified"
    app:layout_constraintEnd_toStartOf="@+id/iconAdmin"
    app:layout_constraintTop_toTopOf="@+id/txtUserName"
    app:srcCompat="@drawable/badge_owner" />

<android.support.v7.widget.AppCompatImageView
    android:id="@+id/iconAdmin"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginStart="8dp"
    app:layout_constraintBottom_toBottomOf="@+id/txtUserName"
    app:layout_constraintStart_toEndOf="@+id/iconOwner"
    app:layout_constraintTop_toTopOf="@+id/txtUserName"
    app:layout_constraintEnd_toStartOf="@+id/iconModerator"
    app:srcCompat="@drawable/badge_adm" />

<android.support.v7.widget.AppCompatImageView
    android:id="@+id/iconModerator"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginEnd="8dp"
    android:layout_marginStart="8dp"
    app:layout_constraintBottom_toBottomOf="@+id/txtUserName"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toEndOf="@+id/iconAdmin"
    app:layout_constraintTop_toTopOf="@+id/txtUserName"
    app:srcCompat="@drawable/badge_mod" />

</android.support.constraint.ConstraintLayout>

VerifiedTextView.java

package br.com.hotmart.hifire.v2.widget;

import android.content.Context;
import android.content.res.TypedArray;
import android.support.v7.widget.AppCompatImageView;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;

import br.com.hotmart.hifire.R;

public class VerifiedTextView extends LinearLayout {
    View layout = null;
    TextView textViewUserName = null;
    AppCompatImageView iconVerified = null;
    AppCompatImageView iconOwner = null;
    AppCompatImageView iconAdmin = null;
    AppCompatImageView iconModerator = null;
    Context context = null;

    public VerifiedTextView(Context context) {

        super(context);
        this.context = context;
    }

    public VerifiedTextView(Context context, AttributeSet attrs) {
        super(context, attrs);

        this.context = context;

        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.VerifiedTextView);

        String userName = a.getString(R.styleable.VerifiedTextView_userName);
        userName = userName == null ? "" : userName;

        boolean isVerified = a.getBoolean(R.styleable.VerifiedTextView_isVerified, false);
        boolean isOwner = a.getBoolean(R.styleable.VerifiedTextView_isOwner, false);
        boolean isAdmin = a.getBoolean(R.styleable.VerifiedTextView_isAdmin, false);
        boolean isModerator = a.getBoolean(R.styleable.VerifiedTextView_isModerator, false);

        String service = Context.LAYOUT_INFLATER_SERVICE;
        LayoutInflater li = (LayoutInflater) getContext().getSystemService(service);

        if (li != null) {
            layout = li.inflate(R.layout.verified_component, this, true);

            textViewUserName = layout.findViewById(R.id.txtUserName);
            iconVerified = layout.findViewById(R.id.iconVerified);
            iconOwner = layout.findViewById(R.id.iconOwner);
            iconAdmin = layout.findViewById(R.id.iconAdmin);
            iconModerator = layout.findViewById(R.id.iconModerator);

            setText(userName);
            setIsVerified(isVerified);
            setIsOwner(isOwner);
            setIsAdmin(isAdmin);
            setIsModerator(isModerator);
        }
        a.recycle();
    }

    public VerifiedTextView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        this.context = context;
    }

    @SuppressWarnings("unused")
    public void setText(String text) {
        textViewUserName.setText(text);
    }

    @SuppressWarnings("unused")
    public void setIsVerified(boolean isVerified) {
        iconVerified.setVisibility(isVerified ? View.VISIBLE : View.GONE);
    }

    @SuppressWarnings("unused")
    public void setIsOwner(boolean isOwner) {
        iconOwner.setVisibility(isOwner ? View.VISIBLE : View.GONE);
    }

    @SuppressWarnings("unused")
    public void setIsAdmin(boolean isAdmin) {
        iconAdmin.setVisibility(isAdmin ? View.VISIBLE : View.GONE);
    }

    @SuppressWarnings("unused")
    public void setIsModerator(boolean isModerator) {
        iconModerator.setVisibility(isModerator ? View.VISIBLE : View.GONE);
    }
}

使用示例：

<com.example.VerifiedTextView
    android:id="@+id/text_name_user"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginStart="8dp"
    app:userName="Lorem Ipsum"
    app:layout_constraintBottom_toTopOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.0"
    app:layout_constraintStart_toEndOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

Answer 1

您可以编写View的构造函数，以从传入的Attributes中读取这些属性，然后调用内部文本视图以设置这些属性。

如何将多个可绘制对象添加到TextView？

1 个答案: