我的发现:
您需要几个过滤器来处理检索文件的不同方法。例如,通过gmail附件,通过文件浏览器,通过HTTP,通过FTP ...它们都发送非常不同的意图。
您需要在活动代码中过滤掉触发您的活动的意图。
对于下面的示例,我创建了一个伪文件类型new.mrz。我从gmail附件和文件资源管理器中检索了它。
在onCreate()中添加的活动代码:
Intent intent = getIntent();
String action = intent.getAction();
if (action.compareTo(Intent.ACTION_VIEW) == 0) {
String scheme = intent.getScheme();
ContentResolver resolver = getContentResolver();
if (scheme.compareTo(ContentResolver.SCHEME_CONTENT) == 0) {
Uri uri = intent.getData();
String name = getContentName(resolver, uri);
Log.v("tag" , "Content intent detected: " + action + " : " + intent.getDataString() + " : " + intent.getType() + " : " + name);
InputStream input = resolver.openInputStream(uri);
String importfilepath = "/sdcard/My Documents/" + name;
InputStreamToFile(input, importfilepath);
}
else if (scheme.compareTo(ContentResolver.SCHEME_FILE) == 0) {
Uri uri = intent.getData();
String name = uri.getLastPathSegment();
Log.v("tag" , "File intent detected: " + action + " : " + intent.getDataString() + " : " + intent.getType() + " : " + name);
InputStream input = resolver.openInputStream(uri);
String importfilepath = "/sdcard/My Documents/" + name;
InputStreamToFile(input, importfilepath);
}
else if (scheme.compareTo("http") == 0) {
// TODO Import from HTTP!
}
else if (scheme.compareTo("ftp") == 0) {
// TODO Import from FTP!
}
}
Gmail附件过滤器:
<intent-filter android:label="@string/app_name">
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="content" />
<data android:mimeType="application/octet-stream" />
</intent-filter>
- 日志:检测到内容意图:android.intent.action.VIEW:content://gmail-ls/l.foul@gmail.com/messages/2950/attachments/0.1/BEST/false:application / octet-stream:新。先生
文件浏览器过滤器:
<intent-filter android:label="@string/app_name">
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="file" />
<data android:pathPattern=".*\\.mrz" />
</intent-filter>
- 日志:检测到文件意图:android.intent.action.VIEW:file:///storage/sdcard0/My%20Documents/new.mrz:null:new.mrz
HTTP过滤器:
<intent-filter android:label="@string/rbook_viewer">
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="http" />
<data android:pathPattern=".*\\.mrz" />
</intent-filter>
上面使用的私有函数:
private String getContentName(ContentResolver resolver, Uri uri){
Cursor cursor = resolver.query(uri, null, null, null, null);
cursor.moveToFirst();
int nameIndex = cursor.getColumnIndex(MediaStore.MediaColumns.DISPLAY_NAME);
if (nameIndex >= 0) {
return cursor.getString(nameIndex);
} else {
return null;
}
}
private void InputStreamToFile(InputStream in, String file) {
try {
OutputStream out = new FileOutputStream(new File(file));
int size = 0;
byte[] buffer = new byte[1024];
while ((size = in.read(buffer)) != -1) {
out.write(buffer, 0, size);
}
out.close();
}
catch (Exception e) {
Log.e("MainActivity", "InputStreamToFile exception: " + e.getMessage());
}
}