在APP中我们经常会遇到下面的UI
图片来源于今日头条APP个人中心界面的截图
下面咱们进入主题正式介绍如何使用databinding来自定义setter。
先上效果图：
databinding自定义setter
自定义View布局文件setting_view_layout .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="72dp">
<ImageView
android:id="@+id/id_iv_icon"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_marginLeft="16dp"
android:layout_marginTop="16dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:src="@mipmap/ic_launcher"/>
<TextView
android:id="@+id/id_tv_title"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="12dp"
app:layout_constraintBottom_toBottomOf="@+id/id_iv_icon"
app:layout_constraintLeft_toRightOf="@+id/id_iv_icon"
app:layout_constraintTop_toTopOf="@+id/id_iv_icon"
tools:text="标题"/>
<TextView
android:id="@+id/id_tv_hint"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginRight="12dp"
app:layout_constraintBottom_toBottomOf="@+id/id_iv_arrow"
app:layout_constraintRight_toLeftOf="@+id/id_iv_arrow"
app:layout_constraintTop_toTopOf="@+id/id_iv_arrow"
tools:text="提示"/>
<ImageView
android:id="@+id/id_iv_arrow"
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_marginRight="16dp"
app:layout_constraintBottom_toBottomOf="@+id/id_iv_icon"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="@+id/id_iv_icon"
tools:src="@mipmap/go_icon"/>
<View
android:id="@+id/id_view_line1"
android:layout_width="0dp"
android:layout_height="0.5dp"
app:layout_constraintBottom_toBottomOf="parent"
tools:background="#d71345"/>
<View
android:id="@+id/id_view_line2"
android:layout_width="0dp"
android:layout_height="0.5dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
tools:background="#d71345"/>
</android.support.constraint.ConstraintLayout>
效果如下：
图是在xml中截取的
自定义View代码：
public class SetterView extends ConstraintLayout {
private ImageView mIvIcon;
private TextView mTvTitle;
private TextView mTvHint;
private ImageView mIvArrow;
private View mLine1;
private View mLine2;
public SetterView(Context context) {
this(context, null);
}
public SetterView(Context context, AttributeSet attrs) {
this(context, attrs,0);
}
public SetterView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initView(context);
}
private void initView(Context context){
View view = LayoutInflater.from(context).inflate(R.layout.setting_view_layout, this);
mIvIcon = (ImageView) view.findViewById(R.id.id_iv_icon);
mTvTitle = (TextView) view.findViewById(R.id.id_tv_title);
mTvHint = (TextView) view.findViewById(R.id.id_tv_hint);
mIvArrow = (ImageView) view.findViewById(R.id.id_iv_arrow);
mLine1 = view.findViewById(R.id.id_view_line1);
mLine2 = view.findViewById(R.id.id_view_line2);
}
public void setIcon(Drawable resId){
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
mIvIcon.setBackground(resId);
}else{
mIvIcon.setBackgroundDrawable(resId);
}
}
public void setTitle(String title){
mTvTitle.setText(title);
}
public void setHint(String hint){
mTvHint.setText(hint);
}
public void setArrowVisible(Drawable resId){
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
mIvArrow.setBackground(resId);
}else{
mIvArrow.setBackgroundDrawable(resId);
}
}
/**
* 有margin的line
* @param colorId
*/
public void setLine2Visible(int colorId){
mLine1.setVisibility(View.GONE);
mLine2.setBackgroundColor(colorId);
}
/**
* match_parent的line
* @param colorId
*/
public void setLine1Visible(int colorId){
mLine1.setBackgroundColor(colorId);
mLine2.setVisibility(View.GONE);
}
}
在Activity的activity_attr_setter_layout .xml中使用：
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
>
<data class="AttrBind">
</data>
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<cn.custom.widget.widget.SetterView
android:id="@+id/id_set_1"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:icon="@{@drawable/phone}"
app:title="@{@string/s_phone}"
app:hint="@{@string/s_phone_hint}"
app:arrowVisible="@{@drawable/go_icon}"
app:line2Visible="@{@color/c_d71345}"
/>
<cn.custom.widget.widget.SetterView
android:id="@+id/id_set_2"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/id_set_1"
app:layout_constraintRight_toRightOf="parent"
app:icon="@{@drawable/phone}"
app:title="@{@string/s_phone}"
app:hint="@{@string/s_phone_hint}"
app:arrowVisible="@{@drawable/go_icon}"
app:line2Visible="@{@color/c_d71345}"
/>
<cn.custom.widget.widget.SetterView
android:id="@+id/id_set_3"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/id_set_2"
app:icon="@{@drawable/phone}"
app:title="@{@string/s_phone}"
app:hint="@{@string/s_phone_hint}"
app:arrowVisible="@{@drawable/go_icon}"
app:line2Visible="@{@color/c_d71345}"
/>
<cn.custom.widget.widget.SetterView
android:id="@+id/id_set_4"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/id_set_3"
app:icon="@{@drawable/phone}"
app:title="@{@string/s_phone}"
app:hint="@{@string/s_phone_hint}"
app:arrowVisible="@{@drawable/go_icon}"
app:line2Visible="@{@color/c_d71345}"
/>
<cn.custom.widget.widget.SetterView
android:id="@+id/id_set_5"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/id_set_4"
app:setIcon="@{@drawable/phone}"
app:setTitle="@{@string/s_phone}"
app:hint="@{@string/s_phone_hint}"
app:arrowVisible="@{@drawable/go_icon}"
app:line1Visible="@{@color/c_d71345}"/>
</android.support.constraint.ConstraintLayout>
</layout>
activity中的代码：
public class AttributeSettersActivity extends AppCompatActivity {
private AttrBind mAttrBind;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mAttrBind=DataBindingUtil.setContentView(this,R.layout.activity_attr_setter_layout);
}
}
app:setIcon="@{@drawable/phone}"
和
app:icon="@{@drawable/phone}"
是等价的。
如何使用根据自己的习惯来吧。
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