Android 如何在导航抽屉活动中进行双向数据绑定?

Android 如何在导航抽屉活动中进行双向数据绑定?,android,android-databinding,Android,Android Databinding,我正在项目中实现双向数据绑定,但我无法在导航抽屉活动中进行数据绑定。我试过了,但出了一个错误。请提供一些相同的示例代码 content\u policy\u info.xml <layout xmlns:android="http://schemas.android.com/apk/res/android"> <data> <variable name="policyinfo" type="c

我正在项目中实现双向数据绑定,但我无法在导航抽屉活动中进行数据绑定。我试过了,但出了一个错误。请提供一些相同的示例代码

content\u policy\u info.xml

 <layout xmlns:android="http://schemas.android.com/apk/res/android">
    <data>
        <variable
            name="policyinfo"
            type="com.exlservice.lifeprov1.service.model.GetPolicyInfoResponse" />

        <variable
            name="surrenderquote"
            type="com.exlservice.lifeprov1.service.model.SurrenderQuoteResponse" />
    </data>
<android.support.constraint.ConstraintLayout
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:id="@+id/c1"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context=".view.ui.PolicyInfo"
    tools:showIn="@layout/app_bar_policy_info">
    <android.support.v4.widget.NestedScrollView
        android:layout_width="match_parent"
        android:background="#223d50"
        android:layout_height="match_parent">
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">
            <LinearLayout android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical"
                android:background="@drawable/policy_prime_info_bg"
                android:layout_marginTop="20dp"
                android:layout_marginLeft="10dp"
                android:layout_marginRight="10dp"
                >
                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="8dp"
                    android:orientation="horizontal">

                    <TextView
                        android:layout_width="0dp"
                        android:layout_marginLeft="5dp"
                        android:layout_height="wrap_content"
                        android:text="@{policyInfo.ProductId}"
                        android:textColor="#76c6db"
                        android:layout_weight="1"
                        android:typeface="serif"
                        android:textStyle="bold"
                        android:id="@+id/id_fc_first_key"/>
                    <TextView
                        android:layout_width="0dp"
                        android:textColor="#76c6db"
                        android:textStyle="bold"
                        android:typeface="serif"
                        android:layout_height="wrap_content"
                        android:text="@{policyInfo.Contract}"
                        android:layout_weight="1"
                        android:id="@+id/id_fc_second_key"/>

                </LinearLayout>
           </LinearLayout>
    </android.support.v4.widget.NestedScrollView>
</android.support.constraint.ConstraintLayout>
</layout>

PolicyInfo.java

public class PolicyInfo extends AppCompatActivity
    implements NavigationView.OnNavigationItemSelectedListener {
APIInterface apiInterface;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    binding= DataBindingUtil.setContentView(this,R.layout.activity_policy_info);
    Intent intent = getIntent();
    String sCompanyCode = intent.getStringExtra("CompanyCode");
    String sPolicyNumber = intent.getStringExtra("PolicyNumber");
    String sWayPoint = intent.getStringExtra("WayPoint");
    Log.e("onCreate: ",sCompanyCode+"   "+sPolicyNumber );
    SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
    String currentTime = sdf.format(new Date());
    SurrenderQuoteInput surrenderQuoteInput = new SurrenderQuoteInput();
    surrenderQuoteInput.setCoderID("TRN7");
    surrenderQuoteInput.setCompanyCode("01");



    PolicyDetailsReq policyDetailsReq= new PolicyDetailsReq();
    policyDetailsReq.setCoderID("TRN7");

    getPolicyInfoRequest.setPolicyDetailsReq(policyDetailsReq);

    PolicyInfoViewModel.Factory factory = new PolicyInfoViewModel.Factory(
            getApplication(),getPolicyInfoRequest,surrenderQuoteRequest);

    pd = new ProgressDialog(PolicyInfo.this);
    //setContentView(R.layout.activity_policy_info);

    pref= getSharedPreferences("LoginDetail", 0);
    Toolbar toolbar =  findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    getSupportActionBar().setTitle("Poilcy Info");
    apiInterface = APIClient.getClient().create(APIInterface.class);
    FloatingActionButton fab =  findViewById(R.id.fab);



    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                    .setAction("Action", null).show();
        }
    });
    apiInterface = APIClient.getClient().create(APIInterface.class);

    PolicyInfoViewModel viewModel =
            ViewModelProviders.of(this,factory).get(PolicyInfoViewModel.class);
    **observeViewModel**(viewModel);
    pd.setTitle("Loading...");
    pd.setMessage("Please wait.");
    pd.setCancelable(false);
    // show it
    pd.show();
    DrawerLayout drawer =  findViewById(R.id.drawer_layout);
    ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
            this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
    drawer.addDrawerListener(toggle);
    toggle.syncState();

    NavigationView navigationView =  findViewById(R.id.nav_view);
    navigationView.setNavigationItemSelectedListener(this);

}
private void **observeViewModel**(final PolicyInfoViewModel viewModel) {
    // Update the list when the data changes
    viewModel.getPolicyInfoResponsetObservable().observe(this, new Observer<GetPolicyInfoResponse>() {
        @Override
        public void onChanged(@Nullable GetPolicyInfoResponse getPolicyInfoResponse) {
            if(getPolicyInfoResponse!=null) {
                viewModel.setPolicyInfoResult(getPolicyInfoResponse);
                binding.setPolicyinfo(getPolicyInfoResponse);
            }
           /* if (getLastAccessedDetailsResult != null) {
                getLastAccessedDetailsRes=getLastAccessedDetailsResult;
                viewModel.setLastAccessedDetailsResult(getLastAccessedDetailsResult);
                setupViewPager(viewPager);
            }*/
        }

    });
}
public class PolicyInfo扩展了AppCompative活动
实现NavigationView.OnNavigationItemSelectedListener{
api接口api接口;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
binding=DataBindingUtil.setContentView(this,R.layout.activity\u policy\u info);
Intent=getIntent();
字符串sCompanyCode=intent.getStringExtra(“公司代码”);
String sPolicyNumber=intent.getStringExtra(“PolicyNumber”);
String sweepoint=intent.getStringExtra(“航路点”);
Log.e(“onCreate:,sCompanyCode+”+sPolicyNumber);
SimpleDataFormat sdf=新的SimpleDataFormat(“yyyyMMdd”);
字符串currentTime=sdf.format(new Date());
SurrenderQuoteInput SurrenderQuoteInput=新的SurrenderQuoteInput();
提交QuoteInput.setCoderID(“TRN7”);
放弃QuoteInput.setCompanyCode(“01”);
PolicyDetailsReq PolicyDetailsReq=新的PolicyDetailsReq();
保单详情请参见setCoderID(“TRN7”);
getPolicyInfoRequest.setPolicyDetailsReq(policyDetailsReq);
PolicyInfoViewModel.Factory工厂=新的PolicyInfoViewModel.Factory(
getApplication()、getPolicyInfoRequest、SubunderQuoteRequest);
pd=新建进度对话框(PolicyInfo.this);
//setContentView(R.layout.activity\u policy\u info);
pref=getSharedReferences(“LoginDetail”,0);
Toolbar Toolbar=findviewbyd(R.id.Toolbar);
设置支持操作栏(工具栏);
getSupportActionBar().setTitle(“POICY信息”);
apinterface=APIClient.getClient().create(apinterface.class);
FloatingActionButton fab=findViewById(R.id.fab);
fab.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图){
Snackbar.make(查看“替换为您自己的操作”,Snackbar.LENGTH\u LONG)
.setAction(“Action”,null).show();
}
});
apinterface=APIClient.getClient().create(apinterface.class);
PolicyInfoViewModel视图模型=
ViewModelProviders.of(this,factory.get)(PolicyInfoViewModel.class);
**ObserveView模型**(viewModel);
pd.设置标题(“加载…”);
设置消息(“请稍候”);
pd.可设置可取消(假);
//表现出来
pd.show();
抽屉布局抽屉=findViewById(R.id.抽屉布局);
ActionBarDrawerToggle切换=新建ActionBarDrawerToggle(
这,抽屉,工具栏,R.string.navigation\u drawer\u open,R.string.navigation\u drawer\u close);
抽屉。添加抽屉链接器(切换);
toggle.syncState();
NavigationView NavigationView=findViewById(R.id.nav_视图);
navigationView.setNavigationItemSelectedListener(此);
}
私有void**observeViewModel**(最终保单信息视图模型视图模型){
//数据更改时更新列表
viewModel.GetPolicyInfoResponseToObservable().observe(这是新的观察者(){
@凌驾
更改后的公共void(@Nullable GetPolicyInfoResponse GetPolicyInfoResponse){
if(getPolicyInfoResponse!=null){
setPolicyInfoResult(getPolicyInfoResponse);
binding.setPolicyinfo(getPolicyInfoResponse);
}
/*if(getLastAccessedDetailsResult!=null){
getLastAccessedDetailsResult=getLastAccessedDetailsResult;
viewModel.setLastAccessedDetailsResult(getLastAccessedDetailsResult);
设置viewPager(viewPager);
}*/
}
});
}
上面显示类强制转换异常的错误 无法将android.support.v7.widget.AppCompatTextView强制转换为android.support.design.widget.NavigationView

完整堆栈跟踪

2019-11-05 16:28:27.673 3019-3019/com.exlservice.lifeprov1 E/AndroidRuntime:致命异常:main 进程:com.exlservice.lifeprov1,PID:3019 java.lang.RuntimeException:无法启动活动组件信息{com.exlservice.lifeprov1/com.exlservice.lifeprov1.view.ui.PolicyInfo}:java.lang.ClassCastException:android.support.v7.widget.AppCompatTextView无法转换为android.support.design.widget.NavigationView 在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2817)上 位于android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892) 位于android.app.ActivityThread.-wrap11(未知来源:0) 在android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593) 位于android.os.Handler.dispatchMessage(Handler.java:105) 位于android.os.Looper.loop(Looper.java:164) 位于android.app.ActivityThread.main(ActivityThread.java:6541) 位于java.lang.reflect.Method.invoke(本机方法) 在com.android.internal.os.Zygote$MethodAndArgsCaller.run上(Zygote.java:240) 位于com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767) 原因:java.lang.ClassCastException:android.support.v7.widget.AppCompatTextView无法强制转换为android.support.design.widget.NavigationView 位于com.exlservice.lifeprov1.databinding.ActivityPolicyInfoBindingImpl.(ActivityPolicyInfoBindingImpl.java:30) 位于com.exlservice.lifeprov1.databinding.ActivityPolicyInfoBindingImpl.(ActivityPolicyInfoBindingImpl.java:27) 位于com.exlservice.lifeprov1.DataBinderMapperImpl.getDataBinder(DataBinderMapperImpl.java:56) 位于android.databinding.MergedDataBinderMapper.getDataBinder(MergedDataBinderMapper.java:74) 位于android.databinding.databindingtul.bind(databindingtul.java:199) 在android.databinding.DataBindingUtil.bindToAddedViews
NavigationView navigationView =  findViewById(R.id.nav_view);