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Added Drag and Drop feature
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Drag JSON file and drop it into the app to open it
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@SlaVcE14
SlaVcE14 committed Jan 27, 2024
1 parent e3ac4be commit 2e5a5dd
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Showing 5 changed files with 134 additions and 21 deletions.
3 changes: 2 additions & 1 deletion app/src/main/AndroidManifest.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -18,12 +18,13 @@
<activity android:name="com.sjapps.about.AboutActivity"/>
<activity
android:name=".MainActivity"
android:configChanges="orientation|screenSize"
android:configChanges="orientation|screenSize|smallestScreenSize|screenLayout"
android:exported="true">
<meta-data android:name="android.app.shortcuts"
android:resource="@xml/shortcuts" />
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<action android:name="android.intent.action.OPEN_DOCUMENT"/>

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
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12 changes: 5 additions & 7 deletions app/src/main/java/com/sjapps/jsonlist/FileSystem.java
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Original file line number Diff line number Diff line change
@@ -1,14 +1,16 @@
package com.sjapps.jsonlist;

import android.content.Context;
import android.content.res.AssetFileDescriptor;
import android.net.Uri;

import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.file.Path;
public class FileSystem {
Expand All @@ -21,7 +23,7 @@ public static JsonArray loadDataToJsonArray(JsonElement data) {
return data.getAsJsonArray();
}

public static String LoadDataFromFile(MainActivity mainActivity, Uri uri) {
public static String LoadDataFromFile(Context context, Uri uri, InputStream inputStream, AssetFileDescriptor fileDescriptor) {

if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
String path = uri.getPath();
Expand All @@ -34,18 +36,14 @@ public static String LoadDataFromFile(MainActivity mainActivity, Uri uri) {

StringBuilder sb = new StringBuilder();
try {
FileInputStream inputStream = (FileInputStream) mainActivity.getContentResolver().openInputStream(uri);
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));

AssetFileDescriptor fileDescriptor = mainActivity.getContentResolver().openAssetFileDescriptor(uri , "r");

long currentBytes = 0;
long fileSize = fileDescriptor.getLength();
String line;
while ((line = reader.readLine()) != null) {
sb.append(line);
currentBytes += line.length();
mainActivity.updateProgress((int)((currentBytes/(float)fileSize)*100));
((MainActivity) context).updateProgress((int)((currentBytes/(float)fileSize)*100));
}

fileDescriptor.close();
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104 changes: 91 additions & 13 deletions app/src/main/java/com/sjapps/jsonlist/MainActivity.java
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Expand Up @@ -11,13 +11,18 @@

import android.app.Activity;
import android.content.Context;
import android.content.ClipData;
import android.content.Intent;
import android.content.res.AssetFileDescriptor;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.transition.AutoTransition;
import android.transition.TransitionManager;
import android.util.Log;
import android.util.TypedValue;
import android.view.DragAndDropPermissions;
import android.view.DragEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
Expand All @@ -31,6 +36,7 @@
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;

Expand All @@ -40,13 +46,15 @@
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;

import com.sjapps.about.AboutActivity;
import com.sjapps.adapters.ListAdapter;
import com.sjapps.jsonlist.java.JsonData;
import com.sjapps.jsonlist.java.ListItem;
import com.sjapps.library.customdialog.BasicDialog;


import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;


Expand All @@ -68,6 +76,7 @@ public class MainActivity extends AppCompatActivity {
AutoTransition autoTransition = new AutoTransition();
Handler handler = new Handler();
Thread readFileThread;
RelativeLayout dropTarget;

@Override
protected void onResume() {
Expand Down Expand Up @@ -101,14 +110,70 @@ protected void onCreate(Bundle savedInstanceState) {
dim_bg.setOnClickListener(view -> open_closeMenu());


Intent intent = getIntent();
Intent intent = getIntent();
Log.d(TAG, "onCreate: " + intent);
if (Intent.ACTION_VIEW.equals(intent.getAction())) {
ReadFile(intent.getData());
}
if (intent.getAction().equals("android.intent.action.OPEN_FILE")){
ImportFromFile();
}

dropTarget.setOnDragListener((v, event) -> {

TextView dropTargetTxt = v.findViewById(R.id.dropTargetText);
View dropTargetBackground = v.findViewById(R.id.dropTargetBackground);

switch (event.getAction()) {
case DragEvent.ACTION_DRAG_STARTED:
dropTarget.setAlpha(1);
return true;

case DragEvent.ACTION_DRAG_ENTERED:
if (event.getClipDescription().hasMimeType("application/json")) {
dropTargetBackground.setBackgroundColor(setColor(R.attr.colorPrimary));
dropTargetBackground.setAlpha(.8f);
}else {
dropTargetTxt.setText(R.string.this_is_not_json_file);
dropTargetBackground.setBackgroundColor(setColor(R.attr.colorError));
}
return true;

case DragEvent.ACTION_DRAG_EXITED:
dropTargetTxt.setText(R.string.drop_json_file_here);
dropTargetBackground.setBackgroundColor(setColor(R.attr.colorOnBackground));
dropTargetBackground.setAlpha(.5f);
return true;

case DragEvent.ACTION_DRAG_ENDED:
dropTargetTxt.setText(R.string.drop_json_file_here);
dropTargetBackground.setBackgroundColor(setColor(R.attr.colorOnBackground));
dropTarget.setAlpha(0);
return true;

case DragEvent.ACTION_DROP:
if (!event.getClipDescription().hasMimeType("application/json"))
return false;
if (readFileThread != null && readFileThread.isAlive()) {
Snackbar.make(getWindow().getDecorView(),"Loading file in progress, try again later", BaseTransientBottomBar.LENGTH_SHORT).show();
return false;
}

ClipData.Item item = event.getClipData().getItemAt(0);

DragAndDropPermissions dropPermissions = null;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N)
dropPermissions = requestDragAndDropPermissions(event);

ReadFile(item.getUri());

if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N && dropPermissions != null)
dropPermissions.release();

return true;
}
return false;
});
}

private void OpenAbout() {
Expand Down Expand Up @@ -168,6 +233,7 @@ private void initialize() {
dim_bg.bringToFront();
menu.bringToFront();
menuBtn.bringToFront();
dropTarget = findViewById(R.id.dropTarget);
}

private void open_closeMenu() {
Expand Down Expand Up @@ -314,21 +380,27 @@ void ReadFile(Uri uri){
}
loadingStarted("Reading file");

try {
InputStream inputStream = getContentResolver().openInputStream(uri);
AssetFileDescriptor fileDescriptor = getContentResolver().openAssetFileDescriptor(uri , "r");

readFileThread = new Thread(() -> {
String Data = FileSystem.LoadDataFromFile(MainActivity.this, uri);
readFileThread = new Thread(() -> {

if (Data == null) {
Log.d(TAG, "ReadFile: null data");
return;
}
handler.post(() -> {
LoadData(Data);
});
String Data = FileSystem.LoadDataFromFile(MainActivity.this, uri, inputStream, fileDescriptor);

});
readFileThread.start();
if (Data == null) {
Log.d(TAG, "ReadFile: null data");
return;
}
handler.post(() -> {
LoadData(Data);
});

});
readFileThread.start();
} catch (IOException e) {
throw new RuntimeException(e);
}
}

void loadingStarted(){
Expand Down Expand Up @@ -379,6 +451,12 @@ void loadingFinished(boolean isFinished){
}


int setColor(int resid){
TypedValue typedValue = new TypedValue();
getTheme().resolveAttribute(resid, typedValue, true);
return typedValue.data;
}

public static void setAnimation(Context context, @NonNull View view, @AnimRes int animationRes) {
setAnimation(context,view,animationRes,null);
}
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34 changes: 34 additions & 0 deletions app/src/main/res/layout/activity_main.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -164,6 +164,40 @@
</RelativeLayout>


<RelativeLayout
android:id="@+id/dropTarget"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:backgroundTintMode="add"
android:layout_margin="10dp"
android:alpha="0"

>

<View
android:id="@+id/dropTargetBackground"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="?colorOnBackground"
android:alpha=".5"
/>

<TextView
android:id="@+id/dropTargetText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingBottom="30dp"

android:text="@string/drop_json_file_here"
android:textColor="#ffffff"

android:layout_centerInParent="true"
android:layout_alignParentBottom="true"
/>

</RelativeLayout>





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2 changes: 2 additions & 0 deletions app/src/main/res/values/strings.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -2,4 +2,6 @@
<string name="app_name">Json List</string>
<string name="open_file">Open file</string>
<string name="back">Back</string>
<string name="drop_json_file_here">Drop JSON file here</string>
<string name="this_is_not_json_file">This is not JSON file</string>
</resources>

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