我是android新手,尝试通过适配器进入下一个活动,我正在使用
onBindViewHolder()
和 Intent
,下面是代码:
@Override
public void onBindViewHolder(CurrencyViewHolder holder, int position) {
final BureauRateObject br = itemList.get(position);
holder.bureauname.setText(br.getBureau_name());
holder.rates.setText(br.getBuysell());
final String BureauId = br.getBureau_id();
final String BureauName = br.getBureau_name();
holder.root.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(context, SingleForexActivity.class);
// i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
i.putExtra("bureau_id", BureauId);
i.putExtra("bureau_name",BureauName);
context.startActivity(i);
}
});
}
这就是出现的错误:
android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?
at android.app.ContextImpl.startActivity(ContextImpl.java:677)
at android.app.ContextImpl.startActivity(ContextImpl.java:664)
at android.content.ContextWrapper.startActivity(ContextWrapper.java:331)
at Adapters.CurrencySelectorAdapter$1.onClick(CurrencySelectorAdapter.java:64)
at android.view.View.performClick(View.java:5265)
at android.view.View$PerformClick.run(View.java:21534)
at android.os.Handler.handleCallback(Handler.java:815)
at android.os.Handler.dispatchMessage(Handler.java:104)
at android.os.Looper.loop(Looper.java:207)
at android.app.ActivityThread.main(ActivityThread.java:5728)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679)
我尝试了这个解决方案,但下一个活动不会返回到上一个活动。
我的解决方案:(但没有用)
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
下面是整个适配器代码:
package Adapters;
import android.content.Context;
import android.content.Intent;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;
import com.example.naavanito.eamobileforex2.R;
import com.example.naavanito.eamobileforex2.SingleForexActivity;
import java.util.Currency;
import java.util.List;
import Holders.CurrencyViewHolder;
import model.BureauRateObject;
/**
* Created by Admin on 1/21/2017.
*/
public class CurrencySelectorAdapter extends RecyclerView.Adapter<CurrencyViewHolder> {
private List<BureauRateObject> itemList;
private Context context;
public CurrencySelectorAdapter(List<BureauRateObject> itemList, Context context) {
this.itemList = itemList;
this.context = context;
}
@Override
public CurrencyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View layoutview = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_currency_rate,parent,false);
CurrencyViewHolder rcv = new CurrencyViewHolder(layoutview,context);
return rcv;
}
@Override
public void onBindViewHolder(CurrencyViewHolder holder, int position) {
final BureauRateObject br = itemList.get(position);
holder.bureauname.setText(br.getBureau_name());
holder.rates.setText(br.getBuysell());
final String BureauId = br.getBureau_id();
final String BureauName = br.getBureau_name();
holder.root.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(context, SingleForexActivity.class);
// i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
i.putExtra("bureau_id", BureauId);
i.putExtra("bureau_name",BureauName);
context.startActivity(i);
}
});
}
@Override
public int getItemCount() {
return itemList.size();
}
}
您传递给
Context
构造函数的 CurrencySelectorAdapter
应该是托管此 Activity
的 RecyclerView
。然后,您将不会收到此错误。
用
getApplicationContext()
替换 this
对我的情况有帮助。
例如我有:
adapter= new CustomAdapter(dataModels,getApplicationContext());
在我的活动文件中将其更改为:
adapter= new CustomAdapter(dataModels,this);
修复了错误。
出现此类问题的另一个原因是使用
rootView
上下文
示例
val view = window.decorView.rootView
view.context.startActivity(intent)
您应该使用 XML 布局中的父视图,而不是依赖
rootview
来避免三星设备通常发生的此类行为。