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MainActivity.kt
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MainActivity.kt
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package xyz.project.violet
import android.app.Activity
import android.content.Intent
import android.os.Build
import android.os.Bundle
import android.os.Environment
import android.view.KeyEvent
import android.view.View
import android.view.WindowManager
import io.flutter.embedding.android.FlutterFragmentActivity
import io.flutter.embedding.engine.FlutterEngine
import io.flutter.plugin.common.EventChannel
import io.flutter.plugin.common.MethodCall
import io.flutter.plugin.common.MethodChannel
import io.flutter.plugin.common.MethodChannel.MethodCallHandler
import io.flutter.plugins.GeneratedPluginRegistrant
import java.io.FileInputStream
import java.io.FileOutputStream
class MainActivity : FlutterFragmentActivity() {
private val VOLUME_CHANNEL = "xyz.project.violet/volume"
private val NATIVELIBDIR_CHANNEL = "xyz.project.violet/nativelibdir"
private val EXTERNAL_STORAGE_DIRECTORY_CHANNEL = "xyz.project.violet/externalStorageDirectory"
private val MISC_CHANNEL = "xyz.project.violet/misc"
private val EXTERNAL_STORAGE_DIRECTORY_METHODS = mapOf(
"getExternalStorageDirectory" to MethodCallHandler { call, result ->
result.success(Environment.getExternalStorageDirectory().path)
},
"getExternalStorageDownloadsDirectory" to MethodCallHandler { call, result ->
result.success(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).path)
},
)
private var sink: EventChannel.EventSink? = null
//
// Source code from https://github.com/tommy351/eh-redux/commit/0f63f6090c91e06c4ef7241847fad173b4afad86
//
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
window.decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_STABLE or
View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION)
window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P)
window.attributes.layoutInDisplayCutoutMode = WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q)
window.isNavigationBarContrastEnforced = false
}
override fun configureFlutterEngine(flutterEngine: FlutterEngine) {
GeneratedPluginRegistrant.registerWith(flutterEngine)
EventChannel(flutterEngine.dartExecutor.binaryMessenger, VOLUME_CHANNEL).setStreamHandler(object : EventChannel.StreamHandler {
override fun onListen(arguments: Any?, eventSink: EventChannel.EventSink?) {
sink = eventSink
}
override fun onCancel(arguments: Any?) {
sink = null
}
})
MethodChannel(flutterEngine.dartExecutor.binaryMessenger, NATIVELIBDIR_CHANNEL).setMethodCallHandler { call, result ->
// Note: this method is invoked on the main thread.
if (call.method == "getNativeDir") {
result.success(applicationContext.applicationInfo.nativeLibraryDir)
} else {
result.notImplemented()
}
}
MethodChannel(flutterEngine.dartExecutor.binaryMessenger, EXTERNAL_STORAGE_DIRECTORY_CHANNEL).setMethodCallHandler { call, result ->
val method = EXTERNAL_STORAGE_DIRECTORY_METHODS[call.method]
if (method != null) {
method.onMethodCall(call, result)
} else {
result.notImplemented()
}
}
MethodChannel(flutterEngine.dartExecutor.binaryMessenger, MISC_CHANNEL).setMethodCallHandler { call, result ->
when (call.method) {
"finishMainActivity" -> finishMainActivity(call, result)
"exportFile" -> exportFile(call, result)
else -> result.notImplemented()
}
}
}
override fun onKeyDown(keyCode: Int, event: KeyEvent?): Boolean {
if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN || keyCode == KeyEvent.KEYCODE_VOLUME_UP) {
sink?.success(if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN) "down" else "up")
return true
}
return super.onKeyDown(keyCode, event)
}
private fun finishMainActivity(call: MethodCall, result: MethodChannel.Result) {
finish()
result.success(null)
}
private class ExportFileRequest(
val filePath: String,
val call: MethodCall,
val result: MethodChannel.Result,
)
private var nextExportFileRequestCode = 1000001;
private val exportFileRequestMap = hashMapOf<Int, ExportFileRequest>()
private fun exportFile(call: MethodCall, result: MethodChannel.Result) {
val filePath = call.argument<String>("filePath")
val mimeType = call.argument<String>("mimeType")
val fileNameToSaveAs = call.argument<String>("fileNameToSaveAs")
if (filePath == null) {
result.error("noArgument", "filePath", null)
return
}
if (mimeType == null) {
result.error("noArgument", "mimeType", null)
return
}
if (fileNameToSaveAs == null) {
result.error("noArgument", "fileNameToSaveAs", null)
return
}
try {
val intent = Intent(Intent.ACTION_CREATE_DOCUMENT).apply {
addCategory(Intent.CATEGORY_OPENABLE)
type = mimeType
putExtra(Intent.EXTRA_TITLE, fileNameToSaveAs)
}
exportFileRequestMap[nextExportFileRequestCode] =
ExportFileRequest(filePath, call, result)
startActivityForResult(intent, nextExportFileRequestCode++);
} catch (e: Throwable) {
result.error("exception", e.toString(), e);
}
}
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
super.onActivityResult(requestCode, resultCode, data)
val request = exportFileRequestMap[requestCode] ?: return
try {
if (resultCode != Activity.RESULT_OK) {
request.result.error("intentResultFail", "resultCode=$resultCode", null)
return
}
try {
val uri = data!!.data!!
val targetFileDescriptor = contentResolver.openFileDescriptor(uri, "w")
val input = FileInputStream(request.filePath)
val output = FileOutputStream(targetFileDescriptor!!.fileDescriptor)
input.copyTo(output)
input.close()
output.close()
request.result.success(null)
} catch (e: Throwable) {
request.result.error("exception", e.toString(), e);
}
} finally {
exportFileRequestMap.remove(requestCode)
}
}
}