documentsUI下载列表点击事件流程

1.列表布局文件item_doc_list.xml

2.DirectoryFragment.java

private class DocumentsAdapter extends BaseAdapter {

private View getDocumentView(){

.......

if (state.derivedMode == MODE_LIST) {

convertView = inflater.inflate(R.layout.item_doc_list, parent, false);

} else if (state.derivedMode == MODE_GRID) {

convertView = inflater.inflate(R.layout.item_doc_grid, parent, false);}

.....

}

}

mListView.setAdapter(mAdapter);

public View onCreateView(){

mListView.setOnItemClickListener(mItemListener);

}

private OnItemClickListener mItemListener = new OnItemClickListener() {

@Override

public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

final Cursor cursor = mAdapter.getItem(position);

Log.e("like","OnItemClickListener position="+position);

if (cursor != null) {

final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE);

final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS);

Log.e("like","docMimeType="+docMimeType+" docFlags="+docFlags);

if (isDocumentEnabled(docMimeType, docFlags)) {

final DocumentInfo doc = DocumentInfo.fromDirectoryCursor(cursor);

Log.e("like","OnItemClickListener doc.displayName ="+doc.displayName);

((DocumentsActivity) getActivity()).onDocumentPicked(doc);

}

}

}

};

3.DocumentsActivity.java 来处理事件

public void onDocumentPicked(DocumentInfo doc) {

final FragmentManager fm = getFragmentManager();

Log.e("like","onDocumentPicked doc.displayName ="+doc.displayName+" mState.action ="+mState.action);

if (doc.isDirectory()) {

mState.stack.push(doc);

mState.stackTouched = true;

onCurrentDirectoryChanged(ANIM_DOWN);

} else if (mState.action == ACTION_OPEN || mState.action == ACTION_GET_CONTENT) {

// Explicit file picked, return

new ExistingFinishTask(doc.derivedUri).executeOnExecutor(getCurrentExecutor());

} else if (mState.action == ACTION_CREATE) {

// Replace selected file

SaveFragment.get(fm).setReplaceTarget(doc);

} else if (mState.action == ACTION_MANAGE) {

// First try managing the document; we expect manager to filter

// based on authority, so we don't grant.

final Intent manage = new Intent(DocumentsContract.ACTION_MANAGE_DOCUMENT);

manage.setData(doc.derivedUri);

try {

startActivity(manage);

Log.e("like","ACTION_MANAGE"+" doc.derivedUri ="+doc.derivedUri);

//doc.derivedUri =content://com.android.providers.downloads.documents/document/2

} catch (ActivityNotFoundException ex) {

// Fall back to viewing

final Intent view = new Intent(Intent.ACTION_VIEW);

view.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);

view.setData(doc.derivedUri);

try {

Log.e("like","doc.derivedUri ="+doc.derivedUri+"ex = "+ex);

startActivity(view);

} catch (ActivityNotFoundException ex2) {

/// M: Show toast with enhance way.

showToast(R.string.toast_no_application);

}

}

}

}

3.在packages\providers\DownloadProvider\ui\AndroidManifest.xml

<activity

android:name=".TrampolineActivity"

android:theme="@android:style/Theme.NoDisplay"

android:permission="android.permission.MANAGE_DOCUMENTS">

<intent-filter>

<action android:name="android.provider.action.MANAGE_DOCUMENT" />

<category android:name="android.intent.category.DEFAULT" />

<data

android:scheme="content"

android:host="com.android.providers.downloads.documents"

android:mimeType="*/*" />

</intent-filter>

</activity>

4.TrampolineActivity.java

@Override

protected void onCreate(Bundle savedInstanceState) {

switch (status) {

case DownloadManager.STATUS_PENDING:

case DownloadManager.STATUS_RUNNING:

Log.d("like", "1");

sendRunningDownloadClickedBroadcast(id);

finish();

break;

case DownloadManager.STATUS_PAUSED:

Log.d("like", "2");

if (reason == DownloadManager.PAUSED_QUEUED_FOR_WIFI) {

PausedDialogFragment.show(getFragmentManager(), id);

} else {

sendRunningDownloadClickedBroadcast(id);

finish();

}

break;

case DownloadManager.STATUS_SUCCESSFUL:

Log.d("like", "startViewIntent id = "+id);

if (!OpenHelper.startViewIntent(this, id, 0)) {

Toast.makeText(this, R.string.download_no_application_title, Toast.LENGTH_SHORT)

.show();

}

finish();

break;

case DownloadManager.STATUS_FAILED:

Log.d("like", "4");

Log.e("like","DownloadManager.STATUS_FAILED");

FailedDialogFragment.show(getFragmentManager(), id, reason);

break;

}

}

5.执行到OpenHelper.startViewIntent(this, id, 0) OpenHelper.java 通过setDataAndType来打开对应应用

public static boolean startViewIntent(Context context, long id, int intentFlags) {

final Intent intent = OpenHelper.buildViewIntent(context, id);

if (intent == null) {

Log.w(TAG, "No intent built for " + id);

return false;

}

intent.addFlags(intentFlags);

try {

context.startActivity(intent);

return true;

} catch (ActivityNotFoundException e) {

Log.w(TAG, "Failed to start " + intent + ": " + e);

return false;

}

}

/**

* Build an {@link Intent} to view the download with given ID, handling

* subtleties around installing packages.

*/

private static Intent buildViewIntent(Context context, long id) {

final DownloadManager downManager = (DownloadManager) context.getSystemService(

Context.DOWNLOAD_SERVICE);

downManager.setAccessAllDownloads(true);

final Cursor cursor = downManager.query(new DownloadManager.Query().setFilterById(id));

try {

if (!cursor.moveToFirst()) {

return null;

}

final Uri localUri = getCursorUri(cursor, COLUMN_LOCAL_URI);

// ckt: HePJ changed for bug 1065 @{

if(null == localUri){

return null;

}

/// @}

final File file = getCursorFile(cursor, COLUMN_LOCAL_FILENAME);

String mimeType = getCursorString(cursor, COLUMN_MEDIA_TYPE);

if (mimeType == null && file.getName().endsWith(".vcf")) {

mimeType = "text/x-vcard";

}

Log.d(TAG, "file: " + file.getName() + " mimeType: " + mimeType);

final Intent intent = new Intent(Intent.ACTION_VIEW);

/// M: Add to support MTK DRM @{

if (Constants.MTK_DRM_ENABLED

&& null != mimeType

&& (mimeType.equalsIgnoreCase(OmaDrmStore.DrmObjectMime.MIME_DRM_MESSAGE) || mimeType

.equalsIgnoreCase(OmaDrmStore.DrmObjectMime.MIME_DRM_CONTENT))) {

Xlog.i(Constants.DL_DRM, "will send DRM intent");

//DrmManagerClient drmClient = new DrmManagerClient(context);

//OmaDrmClient drmClient = new OmaDrmClient(context);

mimeType = DownloadDrmHelper.getOriginalMimeType(context, file, mimeType);

Xlog.d(Constants.DL_DRM, "Open DRM file:" + localUri + " MimeType is" + mimeType);

intent.setDataAndType(localUri, mimeType);

} else {

/// @}

if ("application/vnd.android.package-archive".equals(mimeType)) {

// PackageInstaller doesn't like content URIs, so open file

intent.setDataAndType(localUri, mimeType);

// Also splice in details about where it came from

final Uri remoteUri = getCursorUri(cursor, COLUMN_URI);

intent.putExtra(Intent.EXTRA_ORIGINATING_URI, remoteUri);

intent.putExtra(Intent.EXTRA_REFERRER, getRefererUri(context, id));

intent.putExtra(Intent.EXTRA_ORIGINATING_UID, getOriginatingUid(context, id));

} else if ("file".equals(localUri.getScheme())) {

intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION

| Intent.FLAG_GRANT_WRITE_URI_PERMISSION);

intent.setDataAndType(

ContentUris.withAppendedId(ALL_DOWNLOADS_CONTENT_URI, id), mimeType);

} else {

intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);

intent.setDataAndType(localUri, mimeType);

}

/// M: Add to support MTK DRM @{

}

/// @}

return intent;

} finally {

cursor.close();

}

}