除了當用戶停止使用足夠長的屏幕鎖定時,我的應用程序運行良好,當他們解鎖它時,應用程序崩潰,我有點不知道爲什麼。以下是錯誤:屏幕解鎖時崩潰
這裏是懶惰適配器:
package com.buhz.helpers;
import java.util.ArrayList;
import java.util.HashMap;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import com.buhz.login.R;
import com.buhz.login.TabHostFragmentActivity;
import com.loopj.android.image.SmartImageView;
public class LazyAdapter extends BaseAdapter {
private Activity activity;
private ArrayList<HashMap<String, String>> data;
private static LayoutInflater inflater=null;
public ImageLoader imageLoader;
public LazyAdapter(Activity a, ArrayList<HashMap<String, String>> d) {
activity = a;
data=d;
inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
imageLoader=new ImageLoader(activity.getApplicationContext());
}
public int getCount() {
return data.size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
View vi=convertView;
if(convertView==null)
vi = inflater.inflate(R.layout.list_row, null);
TextView name = (TextView)vi.findViewById(R.id.name); // title
TextView message = (TextView)vi.findViewById(R.id.message); // artist name
TextView created = (TextView)vi.findViewById(R.id.created); // duration
SmartImageView thumb_image = (SmartImageView) vi.findViewById(R.id.list_image);
HashMap<String, String> update = new HashMap<String, String>();
update = data.get(position);
// Setting all values in listview
name.setText(update.get("name"));
message.setText(update.get("message"));
created.setText(update.get("created"));
thumb_image.setImageUrl(update.get("thumb_img"));
name.setOnClickListener(new myOnClickListener(position));
thumb_image.setOnClickListener(new myOnClickListener(position));
return vi;
}
public class myOnClickListener implements OnClickListener{
private int position;
private String clicked_uid;
public myOnClickListener(int position){
this.position=position;
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
HashMap<String, String> update = new HashMap<String, String>();
update = data.get(position);
Log.i("Update Position:", update.toString());
clicked_uid=update.get("uid");
Log.d("Clicked UID:", clicked_uid+"");
Intent i = new Intent(activity.getApplicationContext() , TabHostFragmentActivity.class);
i.putExtra("profile_uid", clicked_uid);
activity.startActivity(i);
activity.finish();
}
}
}
從您粘貼的logcat中,它看起來像運行Activity onCreate之前引發的異常。所以你的LazyAdapter獲得了一個空值。確保您的生命週期事件按順序觸發,並且您沒有嘗試在正確創建活動之前實例化適配器。 – 2013-04-28 22:57:43
你是什麼意思,當你說「確保你的生命週期事件順序觸發」...截至到現在我使用FragmentActivity和一個片段,我有代碼的唯一生命週期方法是onCreate截至目前。如果我沒有實現它們,爲我處理生命週期方法? – ChuckKelly 2013-04-28 23:27:14
我沒有清楚地說明它 - 基本上你必須確保你在生命週期的正確時間實例化LazyAdapter。 – 2013-04-29 00:22:35