Prefs: move file chooser logic to master branch

src/PrefsAct.scala

@@ -1,11 +1,82 @@
 package org.aprsdroid.app
 
+import _root_.android.content.Intent
+import _root_.android.net.Uri
 import _root_.android.os.Bundle
+import _root_.android.os.Environment
+import _root_.android.preference.Preference
+import _root_.android.preference.Preference.OnPreferenceClickListener
 import _root_.android.preference.PreferenceActivity
+import _root_.android.preference.PreferenceManager
 
 class PrefsAct extends PreferenceActivity {
+	def fileChooserPreference(pref_name : String, reqCode : Int, titleId : Int) {
+		findPreference(pref_name).setOnPreferenceClickListener(new OnPreferenceClickListener() {
+			def onPreferenceClick(preference : Preference) = {
+				val get_file = new Intent(Intent.ACTION_GET_CONTENT).setType("*/*")
+				startActivityForResult(Intent.createChooser(get_file,
+					getString(titleId)), reqCode)
+				true
+			}
+		});
+	}
 	override def onCreate(savedInstanceState: Bundle) {
 		super.onCreate(savedInstanceState)
 		addPreferencesFromResource(R.xml.preferences)
 	}
+
+	def resolveContentUri(uri : Uri) = {
+		val Array(storage, path) = uri.getPath().replace("/document/", "").split(":", 2)
+		android.util.Log.d("PrefsAct", "resolveContentUri s=" + storage + " p=" + path)
+		if (storage == "primary")
+			Environment.getExternalStorageDirectory() + "/" + path
+		else
+			"/storage/" + storage + "/" + path
+	}
+
+	def parseFilePickerResult(data : Intent, pref_name : String, error_id : Int) {
+		val file = data.getData().getScheme() match {
+		case "file" =>
+			data.getData().getPath()
+		case "content" =>
+			// fix up Uri for KitKat+; http://stackoverflow.com/a/20559175/539443
+			// http://stackoverflow.com/a/27271131/539443
+			if ("com.android.externalstorage.documents".equals(data.getData().getAuthority())) {
+				resolveContentUri(data.getData())
+			} else {
+				val fixup_uri = Uri.parse(data.getDataString().replace(
+					"content://com.android.providers.downloads.documents/document",
+					"content://downloads/public_downloads"))
+				val cursor = getContentResolver().query(fixup_uri, null, null, null, null)
+				cursor.moveToFirst()
+				val idx = cursor.getColumnIndex("_data")
+				val result = if (idx != -1) cursor.getString(idx) else null
+				cursor.close()
+				result
+			}
+		case _ =>
+			null
+		}
+		if (file != null) {
+			PreferenceManager.getDefaultSharedPreferences(this)
+				.edit().putString(pref_name, file).commit()
+			android.widget.Toast.makeText(this, file,
+				android.widget.Toast.LENGTH_SHORT).show()
+			// reload prefs
+			finish()
+			startActivity(getIntent())
+		} else {
+			android.widget.Toast.makeText(this, getString(error_id, data.getDataString()),
+				android.widget.Toast.LENGTH_SHORT).show()
+		}
+	}
+
+	override def onActivityResult(reqCode : Int, resultCode : Int, data : Intent) {
+		android.util.Log.d("PrefsAct", "onActResult: request=" + reqCode + " result=" + resultCode + " " + data)
+		if (resultCode == android.app.Activity.RESULT_OK && reqCode == 123456) {
+		} else
+		if (resultCode == android.app.Activity.RESULT_OK && reqCode == 123457) {
+		} else
+			super.onActivityResult(reqCode, resultCode, data)
+	}
 }