Android 将数组列表值传递到选项卡主机,但出现空值错误?
您好,我正在尝试将我的ArrayList值传递到我的TabLayout中,但我得到了null值请帮助我…我成功传递了我的字符串值,但ArrayList值仅为null 这里我试图传递我的字符串和ArrayList值 这是我的代码:Android 将数组列表值传递到选项卡主机,但出现空值错误?,android,string,arraylist,Android,String,Arraylist,您好,我正在尝试将我的ArrayList值传递到我的TabLayout中,但我得到了null值请帮助我…我成功传递了我的字符串值,但ArrayList值仅为null 这里我试图传递我的字符串和ArrayList值 这是我的代码: sdcardImages.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView parent, View v, int p
sdcardImages.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView parent, View v, int position, long id) {
Intent intent = new Intent(ParxmlActivity.this, tabview.class);
intent.putExtra("spec",model_List.get(position).spec);
intent.putExtra("mimage",model_List.get(position).mimage);
intent.putStringArrayListExtra("imageList", model_List.get(position).imageList);
startActivity(intent);
}
});
第一个和第二个值工作正常…规格和图像,但只有图像列表我得到空值
public class tabview extends TabActivity {
Bundle tab_intent;
public static String spec, mimage, imageList;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.viewtab);
tab_intent=tabview.this.getIntent().getExtras();
spec=tab_intent.getString("spec");
mimage = tab_intent.getString("mimage");
imageList = tab_intent.getString("imageList");
上面的代码我正在尝试获取我的值ImageList值只显示null,原因是什么
代码:
这是我试图在tab host中传递的值……更改您的tabview类:
Upd:您正试图从ArrayList所在的捆绑包中获取字符串。有趣。。。在第一个活动中,您将放入StringArrayList,而在第二个活动中,您希望得到一个字符串。。。似乎您不理解自己的代码…错误:类型不匹配:无法从ArrayList转换为Stringchange imageList声明OK i changed ArrayList imageList;现在我也得到了一个错误:类型包中的getStringArrayListString方法不适用于参数ArrayListWhat和where进行了更改?您不应该出现此错误。请询问有关微调器的新问题。
package ml.ml;
import java.util.ArrayList;
import android.os.Parcel;
import android.os.Parcelable;
public class schild {
public String name;
public String model;
public String spec;
public String mimage;
//public String imageList;
//public String videoList;
public ArrayList<String> imageList;
public ArrayList<String> videoList;
public schild(){
name = new String();
model = new String();
spec = new String();
mimage = new String();
imageList = new ArrayList<String>();
videoList = new ArrayList<String>();
//imageList =new String();
//videoList = new String();
}
}
for(int j = 0; j<model_List.size(); j++){
mname_List.add(model_List.get(j).name);
mmimage.add(model_List.get(j).mimage);
mspec_List.add(model_List.get(j).spec);
mvideo_List.addAll(model_List.get(j).videoList);
mmimage_List.addAll(model_List.get(j).imageList);
}
ArrayList<String> imageList;
...
@Override
public void onCreate(Bundle savedInstanceState) {
...
imageList = tab_intent.getStringArrayList("imageList");
...
}