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我正在使用 ListView 和 PullToRefresh 编写自己的 Android 应用程序以刷新此列表。添加下拉刷新后，我遇到了这个错误：当我拉动列表以刷新某些项目时，单击了一些项目。我该如何解决？这是我的 MainActivity 的代码：

package ua.iqw.mistinfo.news;

import android.os.Bundle;

import android.view.Menu;
import android.view.MotionEvent;
import android.view.View.OnTouchListener;

import java.util.ArrayList;
import java.util.concurrent.ExecutionException;

import ua.iqw.mistinfo.news.trace.ExceptionHandler;
import ua.iqw.mistinfo.news.PullToRefreshListView;
import ua.iqw.mistinfo.news.PullToRefreshListView.OnRefreshListener;

import android.app.ListActivity;
import android.app.ProgressDialog;

import android.content.Intent;
import android.util.Log;

import android.view.View;

  import android.widget.ListView;
  import android.widget.Toast;

public class MainActivity extends ListActivity implements OnTouchListener{

ArrayList<ListData> news;
AsyncLoad asyncNews;
RefreshList refresh;
ProgressDialog spinner;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // ExceptionHandler.register(this,
    // "http://errors.bazalt-cms.com/add-android/");

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    final PullToRefreshListView listView = (PullToRefreshListView)findViewById(android.R.id.list);
    spinner = new ProgressDialog(MainActivity.this);
    spinner.setMessage(getString(R.string.loading));
    spinner.show();

    Network net = new Network(this);
    if (net.isNetworkAvailable() == true) {
        Log.d("NETWORK", "Network is available!");
    } else {

        Toast.makeText(this, getString(R.string.connect_error),
                Toast.LENGTH_LONG).show();
    }

    asyncNews = new AsyncLoad(MainActivity.this);
    asyncNews.execute();

    listView.setOnRefreshListener(new OnRefreshListener() {
        @Override
        public void onRefresh() {

            refresh = new RefreshList(MainActivity.this, listView);
            refresh.execute();
        }

    });

}

public void onResume() {
    super.onResume();

    if (spinner.isShowing()) {
        spinner.dismiss();
    }

}

public void onListItemClick(ListView parent, View v, int position, long id) {//listener for click on listView item


    try {
        news = asyncNews.get();
    } catch (InterruptedException e) {

        e.printStackTrace();
    } catch (ExecutionException e) {

        e.printStackTrace();
    }
    ListData ld = news.get(position);

    spinner.setMessage(getString(R.string.loading));
    spinner.show();

    Intent intent = new Intent(MainActivity.this, DetailsActivity.class);
    intent.putExtra("id", ld.id);

    startActivity(intent);

}
}

是否可以为 onListItemClick 设置一些超时？还是可以通过其他方式解决？请帮我！PS对不起我的英语）

4

1 回答 1

3 
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.LinearInterpolator;
import android.view.animation.RotateAnimation;
import android.widget.AbsListView;
import android.widget.ImageView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.AbsListView.OnScrollListener;


public class PullToRefreshListView extends ListView implements OnScrollListener {

    private static final int TAP_TO_REFRESH = 1;
    private static final int PULL_TO_REFRESH = 2;
    private static final int RELEASE_TO_REFRESH = 3;
    private static final int REFRESHING = 4;

    private static final String TAG = "PullToRefreshListView";

    private OnRefreshListener mOnRefreshListener;

    /**
     * Listener that will receive notifications every time the list scrolls.
     */
    private OnScrollListener mOnScrollListener;
    private LayoutInflater mInflater;

    private RelativeLayout mRefreshView;
    private TextView mRefreshViewText;
    private ImageView mRefreshViewImage;
    private ProgressBar mRefreshViewProgress;
    private TextView mRefreshViewLastUpdated;

    private int mCurrentScrollState;
    private int mRefreshState;

    private RotateAnimation mFlipAnimation;
    private RotateAnimation mReverseFlipAnimation;

    private int mRefreshViewHeight;
    private int mRefreshOriginalTopPadding;
    private int mLastMotionY;

    private boolean mBounceHack;

    public PullToRefreshListView(Context context) {
        super(context);
        init(context);
    }

    public PullToRefreshListView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context);
    }

    public PullToRefreshListView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init(context);
    }

    private void init(Context context) {
        // Load all of the animations we need in code rather than through XML
        mFlipAnimation = new RotateAnimation(0, -180,
                RotateAnimation.RELATIVE_TO_SELF, 0.5f,
                RotateAnimation.RELATIVE_TO_SELF, 0.5f);
        mFlipAnimation.setInterpolator(new LinearInterpolator());
        mFlipAnimation.setDuration(250);
        mFlipAnimation.setFillAfter(true);
        mReverseFlipAnimation = new RotateAnimation(-180, 0,
                RotateAnimation.RELATIVE_TO_SELF, 0.5f,
                RotateAnimation.RELATIVE_TO_SELF, 0.5f);
        mReverseFlipAnimation.setInterpolator(new LinearInterpolator());
        mReverseFlipAnimation.setDuration(250);
        mReverseFlipAnimation.setFillAfter(true);

        mInflater = (LayoutInflater) context.getSystemService(
                Context.LAYOUT_INFLATER_SERVICE);

        mRefreshView = (RelativeLayout) mInflater.inflate(
                R.layout.pull_to_refresh_header, this, false);
        mRefreshViewText =
            (TextView) mRefreshView.findViewById(R.id.pull_to_refresh_text);
        mRefreshViewImage =
            (ImageView) mRefreshView.findViewById(R.id.pull_to_refresh_image);
        mRefreshViewProgress =
            (ProgressBar) mRefreshView.findViewById(R.id.pull_to_refresh_progress);
        mRefreshViewLastUpdated =
            (TextView) mRefreshView.findViewById(R.id.pull_to_refresh_updated_at);

        mRefreshViewImage.setMinimumHeight(50);
        mRefreshView.setOnClickListener(new OnClickRefreshListener());
        mRefreshOriginalTopPadding = mRefreshView.getPaddingTop();

        mRefreshState = TAP_TO_REFRESH;

        addHeaderView(mRefreshView);

        super.setOnScrollListener(this);

        measureView(mRefreshView);
        mRefreshViewHeight = mRefreshView.getMeasuredHeight();
    }

    @Override
    protected void onAttachedToWindow() {
        super.onAttachedToWindow();
        setSelection(1);
    }

    @Override
    public void setAdapter(ListAdapter adapter) {
        super.setAdapter(adapter);

        setSelection(1);
    }

    /**
     * Set the listener that will receive notifications every time the list
     * scrolls.
     * 
     * @param l The scroll listener. 
     */
    @Override
    public void setOnScrollListener(AbsListView.OnScrollListener l) {
        mOnScrollListener = l;
    }

    /**
     * Register a callback to be invoked when this list should be refreshed.
     * 
     * @param onRefreshListener The callback to run.
     */
    public void setOnRefreshListener(OnRefreshListener onRefreshListener) {
        mOnRefreshListener = onRefreshListener;
    }

    /**
     * Set a text to represent when the list was last updated. 
     * @param lastUpdated Last updated at.
     */
    public void setLastUpdated(CharSequence lastUpdated) {
        if (lastUpdated != null) {
            mRefreshViewLastUpdated.setVisibility(View.VISIBLE);
            mRefreshViewLastUpdated.setText(lastUpdated);
        } else {
            mRefreshViewLastUpdated.setVisibility(View.GONE);
        }
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        final int y = (int) event.getY();
        mBounceHack = false;

        switch (event.getAction()) {
            case MotionEvent.ACTION_UP:
                if (!isVerticalScrollBarEnabled()) {
                    setVerticalScrollBarEnabled(true);
                }
                if (getFirstVisiblePosition() == 0 && mRefreshState != REFRESHING) {
                    if ((mRefreshView.getBottom() >= mRefreshViewHeight
                            || mRefreshView.getTop() >= 0)
                            && mRefreshState == RELEASE_TO_REFRESH) {
                        // Initiate the refresh
                        mRefreshState = REFRESHING;
                        prepareForRefresh();
                        onRefresh();
                    } else if (mRefreshView.getBottom() < mRefreshViewHeight
                            || mRefreshView.getTop() <= 0) {
                        // Abort refresh and scroll down below the refresh view
                        resetHeader();
                        setSelection(1);
                    }
                }
                break;
            case MotionEvent.ACTION_DOWN:
                mLastMotionY = y;
                break;
            case MotionEvent.ACTION_MOVE:
                applyHeaderPadding(event);
                break;
        }
        return super.onTouchEvent(event);
    }

    private void applyHeaderPadding(MotionEvent ev) {
        // getHistorySize has been available since API 1
        int pointerCount = ev.getHistorySize();

        for (int p = 0; p < pointerCount; p++) {
            if (mRefreshState == RELEASE_TO_REFRESH) {
                if (isVerticalFadingEdgeEnabled()) {
                    setVerticalScrollBarEnabled(false);
                }

                int historicalY = (int) ev.getHistoricalY(p);

                // Calculate the padding to apply, we divide by 1.7 to
                // simulate a more resistant effect during pull.
                int topPadding = (int) (((historicalY - mLastMotionY)
                        - mRefreshViewHeight) / 1.7);

                mRefreshView.setPadding(
                        mRefreshView.getPaddingLeft(),
                        topPadding,
                        mRefreshView.getPaddingRight(),
                        mRefreshView.getPaddingBottom());
            }
        }
    }

    /**
     * Sets the header padding back to original size.
     */
    private void resetHeaderPadding() {
        mRefreshView.setPadding(
                mRefreshView.getPaddingLeft(),
                mRefreshOriginalTopPadding,
                mRefreshView.getPaddingRight(),
                mRefreshView.getPaddingBottom());
    }

    /**
     * Resets the header to the original state.
     */
    private void resetHeader() {
        if (mRefreshState != TAP_TO_REFRESH) {
            mRefreshState = TAP_TO_REFRESH;

            resetHeaderPadding();

            // Set refresh view text to the pull label
            mRefreshViewText.setText(R.string.pull_to_refresh_tap_label);
            // Replace refresh drawable with arrow drawable
            mRefreshViewImage.setImageResource(R.drawable.ic_pulltorefresh_arrow);
            // Clear the full rotation animation
            mRefreshViewImage.clearAnimation();
            // Hide progress bar and arrow.
            mRefreshViewImage.setVisibility(View.GONE);
            mRefreshViewProgress.setVisibility(View.GONE);
        }
    }

    private void measureView(View child) {
        ViewGroup.LayoutParams p = child.getLayoutParams();
        if (p == null) {
            p = new ViewGroup.LayoutParams(
                    ViewGroup.LayoutParams.FILL_PARENT,
                    ViewGroup.LayoutParams.WRAP_CONTENT);
        }

        int childWidthSpec = ViewGroup.getChildMeasureSpec(0,
                0 + 0, p.width);
        int lpHeight = p.height;
        int childHeightSpec;
        if (lpHeight > 0) {
            childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight, MeasureSpec.EXACTLY);
        } else {
            childHeightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
        }
        child.measure(childWidthSpec, childHeightSpec);
    }

    @Override
    public void onScroll(AbsListView view, int firstVisibleItem,
            int visibleItemCount, int totalItemCount) {
        // When the refresh view is completely visible, change the text to say
        // "Release to refresh..." and flip the arrow drawable.
        if (mCurrentScrollState == SCROLL_STATE_TOUCH_SCROLL
                && mRefreshState != REFRESHING) {
            if (firstVisibleItem == 0) {
                mRefreshViewImage.setVisibility(View.VISIBLE);
                if ((mRefreshView.getBottom() >= mRefreshViewHeight + 20
                        || mRefreshView.getTop() >= 0)
                        && mRefreshState != RELEASE_TO_REFRESH) {
                    mRefreshViewText.setText(R.string.pull_to_refresh_release_label);
                    mRefreshViewImage.clearAnimation();
                    mRefreshViewImage.startAnimation(mFlipAnimation);
                    mRefreshState = RELEASE_TO_REFRESH;
                } else if (mRefreshView.getBottom() < mRefreshViewHeight + 20
                        && mRefreshState != PULL_TO_REFRESH) {
                    mRefreshViewText.setText(R.string.pull_to_refresh_pull_label);
                    if (mRefreshState != TAP_TO_REFRESH) {
                        mRefreshViewImage.clearAnimation();
                        mRefreshViewImage.startAnimation(mReverseFlipAnimation);
                    }
                    mRefreshState = PULL_TO_REFRESH;
                }
            } else {
                mRefreshViewImage.setVisibility(View.GONE);
                resetHeader();
            }
        } else if (mCurrentScrollState == SCROLL_STATE_FLING
                && firstVisibleItem == 0
                && mRefreshState != REFRESHING) {
            setSelection(1);
            mBounceHack = true;
        } else if (mBounceHack && mCurrentScrollState == SCROLL_STATE_FLING) {
            setSelection(1);
        }

        if (mOnScrollListener != null) {
            mOnScrollListener.onScroll(view, firstVisibleItem,
                    visibleItemCount, totalItemCount);
        }
    }

    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {
        mCurrentScrollState = scrollState;

        if (mCurrentScrollState == SCROLL_STATE_IDLE) {
            mBounceHack = false;
        }

        if (mOnScrollListener != null) {
            mOnScrollListener.onScrollStateChanged(view, scrollState);
        }
    }

    public void prepareForRefresh() {
        resetHeaderPadding();

        mRefreshViewImage.setVisibility(View.GONE);
        // We need this hack, otherwise it will keep the previous drawable.
        mRefreshViewImage.setImageDrawable(null);
        mRefreshViewProgress.setVisibility(View.VISIBLE);

        // Set refresh view text to the refreshing label
        mRefreshViewText.setText(R.string.pull_to_refresh_refreshing_label);

        mRefreshState = REFRESHING;
    }

    public void onRefresh() {
        Log.d(TAG, "onRefresh");

        if (mOnRefreshListener != null) {
            mOnRefreshListener.onRefresh();
        }
    }

    /**
     * Resets the list to a normal state after a refresh.
     * @param lastUpdated Last updated at.
     */
    public void onRefreshComplete(CharSequence lastUpdated) {
        setLastUpdated(lastUpdated);
        onRefreshComplete();
    }

    /**
     * Resets the list to a normal state after a refresh.
     */
    public void onRefreshComplete() {        
        Log.d(TAG, "onRefreshComplete");

        resetHeader();

        // If refresh view is visible when loading completes, scroll down to
        // the next item.
        if (mRefreshView.getBottom() > 0) {
            invalidateViews();
            setSelection(1);
        }
    }

    /**
     * Invoked when the refresh view is clicked on. This is mainly used when
     * there's only a few items in the list and it's not possible to drag the
     * list.
     */
    private class OnClickRefreshListener implements OnClickListener {

        @Override
        public void onClick(View v) {
            if (mRefreshState != REFRESHING) {
                prepareForRefresh();
                onRefresh();
            }
        }

    }

    /**
     * Interface definition for a callback to be invoked when list should be
     * refreshed.
     */
    public interface OnRefreshListener {
        /**
         * Called when the list should be refreshed.
         * <p>
         * A call to {@link PullToRefreshListView #onRefreshComplete()} is
         * expected to indicate that the refresh has completed.
         */
        public void onRefresh();
    }
}

试试看

于 2013-03-13T15:05:28.017 回答