Question

我见过以下链接，仍无法找到我做错的事。

参考文献：

Android Data Binding Error:Execution failed java.lang.RuntimeException:
https://medium.com/android-news/loading-images-with-data-binding-and-picasso-555dad683fdc#.n91nnx9zy
https://blog.stylingandroid.com/data-binding-part-3/

情境：

我是用于数据绑定的buildng演示，在textview中使用简单文本成功完成，现在我想使用picasso将url传递给imageview。

Student.java

    package model;

import android.databinding.Bindable;
import android.databinding.BaseObservable;
import android.databinding.BindingAdapter;
import android.widget.ImageView;

import com.example.test.example_databinding.R;
import com.squareup.picasso.Picasso;

/**
 * Created by test on 07/20/16.
 */
public class Student extends BaseObservable{

    String name;
    String surname;
    String id;
    String profile_pic;
    boolean is_online;

    public Student(String name, String surname, String id, String profile_pic, boolean is_online) {
        this.name = name;
        this.surname = surname;
        this.id = id;
        this.profile_pic = profile_pic;
        this.is_online = is_online;
    }
@Bindable
public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
    notifyPropertyChanged(com.example.test.example_databinding.BR.name);

}

@Bindable
public String getSurname() {
    return surname;
}

public void setSurname(String surname) {
    this.surname = surname;
    notifyPropertyChanged(com.example.test.example_databinding.BR.surname);
}

@Bindable
public String getId() {
    return id;
}

public void setId(String id) {
    this.id = id;
    notifyPropertyChanged(com.example.test.example_databinding.BR.id);
}

@Bindable
public boolean getis_online() {
    return is_online;
}

public void setIs_online(boolean is_online) {
    this.is_online = is_online;
    notifyPropertyChanged(com.example.test.example_databinding.BR.is_online);
}

@Bindable
public String getProfile_pic() {
    return profile_pic;
}

public void setProfile_pic(String profile_pic) {
    this.profile_pic = profile_pic;
    notifyPropertyChanged(com.example.test.example_databinding.BR.profile_pic);

}

}

activity_demo_1.xml

    <?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
tools:context=".DemoActivity">

<data class="DemoActivitynew">

    <variable
        name="student"
        type="model.Student" />
</data>

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin">

    <ImageView
        android:id="@+id/imageview"
        android:layout_width="200dp"
        android:layout_height="200dp"
        app:profile_pic="@{student.profile_pic}"/>

    <TextView
        android:id="@+id/txt_id"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/imageview"
        android:layout_alignParentTop="true"
        android:text="@{student.id}" />

    <TextView
        android:id="@+id/txt_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/txt_id"
        android:text="@{student.name}" />

    <TextView
        android:id="@+id/txt_surname"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/txt_name"
        android:text="@{student.surname}" />

    <Button
        android:id="@+id/btn_update_data"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Update data"
        android:layout_above="@+id/btn_open_recyclerview"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <Button
        android:id="@+id/btn_open_recyclerview"
        style="?android:attr/buttonStyleSmall"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Open recyclerview"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

</RelativeLayout>

BindingAdapters.java

public class BindingAdapters {

@BindingAdapter("app:profile_pic")
public static void loadImage(ImageView imageView, String profile_pic) {
        Picasso.with(imageView.getContext()).load(profile_pic).into(imageView);
    }
}

DemoActivity.java

public class DemoActivity extends Activity {
Student student;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    DemoActivitynew binding = DataBindingUtil.setContentView(this, R.layout.activity_demo_1);
    student = new Student("Smit","satodia","1","",false);
    binding.setStudent(student);

    binding.btnUpdateData.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            student.setName("Android_smit");
            student.setSurname("Android_satodia");
            student.setProfile_pic("http://fillmurray.com/400/400");
        }
    });
}

}

注意：由于其他部分正在运作，请仅关注imagview部分，我发布完整的代码以供参考。

错误：错误：任务执行失败'：app：compileDebugJavaWithJavac'。   java.lang.RuntimeException：发现数据绑定错误。   **** /数据绑定错误****消息：在android.widget.ImageView上找不到参数类型为java.lang.String的属性'app：profile_pic'的setter。   文件：E：\ Android的\ WTS_adroid_project_stuido \ Example_databinding \程序\ SRC \主\水库\布局\ activity_demo_1.xml   当地时间：25：31 - 25:49   **** \数据绑定错误****

数据绑定时出错，尝试使用毕加索在imageview中设置url

0 个答案: