因此，在我的应用程序中，我有一个RecyclerView，并且每张卡上都有一个编辑按钮，并且该编辑按钮调用一个自定义警报对话框，该对话框具有三个editTexts和一个edit image按钮以及一个图像视图以显示所选图像，并且编辑按钮由非活动类 RecyclerViewAdapter 控制 这是 RecyclerViewAdapter 类：
package com.hitham.miscarros.UI;
import android.Manifest;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Application;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.content.res.Resources;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Parcelable;
import android.os.SystemClock;
import android.preference.PreferenceManager;
import android.provider.MediaStore;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.hitham.miscarros.Activities.DetailsActivity;
import com.hitham.miscarros.Activities.IntentHelper;
import com.hitham.miscarros.Activities.IntentHelperActivity;
import com.hitham.miscarros.Activities.ListActivity;
import com.hitham.miscarros.Activities.MainActivity;
import com.hitham.miscarros.Data.DatabaseHandler;
import com.hitham.miscarros.Model.Cars;
import com.hitham.miscarros.R;
import java.net.URI;
import java.util.List;
import static android.app.Activity.RESULT_OK;
import static android.support.v4.app.ActivityCompat.startActivityForResult;
import static android.support.v4.content.ContextCompat.startActivity;
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder> {
private Context context;
private List<Cars> misCarros;
private AlertDialog dialog;
private AlertDialog.Builder alertBuilder;
private static final int REQUEST_IMAGE_CAPTURE=1;
public boolean clicked = false;
public RecyclerViewAdapter(Context context, List<Cars> misCarros) {
this.context = context;
this.misCarros = misCarros;
}
@NonNull
@Override
public RecyclerViewAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.list_row,parent,false);
return new ViewHolder(view,context);
}
@Override
public void onBindViewHolder(@NonNull RecyclerViewAdapter.ViewHolder holder, int position) {
Cars carro = misCarros.get(position);
Bitmap pic;
if(carro.getCarImage() != null) {
pic = BitmapFactory.decodeFile(carro.getCarImage());
holder.ImagenaDelCarro.setImageBitmap(pic); }
holder.ManufacturarDelCarro.setText(carro.getCarManuf());
holder.NombreDelCarro.setText(carro.getCarName());
holder.ModelDelCarro.setText(carro.getCarModel());
}
@Override
public int getItemCount() {
return misCarros.size();
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public TextView ManufacturarDelCarro;
public TextView NombreDelCarro;
public TextView ModelDelCarro;
public ImageView ImagenaDelCarro;
public Button editarElCarro;
public Button deletarElCarro;
public int id;
public ViewHolder(View view, final Context ctx) {
super(view);
context = ctx;
ManufacturarDelCarro = view.findViewById(R.id.carManuf);
NombreDelCarro = view.findViewById(R.id.carName);
ModelDelCarro = view.findViewById(R.id.carDOB);
ImagenaDelCarro = view.findViewById(R.id.carImage);
editarElCarro = view.findViewById(R.id.editCarID);
deletarElCarro = view.findViewById(R.id.deleteCarID);
editarElCarro.setOnClickListener(this);
deletarElCarro.setOnClickListener(this);
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//todo: go to next screen
int position = getAdapterPosition();
Cars car = misCarros.get(position);
Intent miIntento = new Intent(ctx, DetailsActivity.class);
miIntento.putExtra("name", car.getCarName());
miIntento.putExtra("model", car.getCarModel());
miIntento.putExtra("manuf", car.getCarManuf());
miIntento.putExtra("id", car.getCarID());
miIntento.putExtra("imagePath",car.getCarImage());
ctx.startActivity(miIntento);
}
});
}
@Override
public void onClick(View v) {
switch (v.getId())
{
case R.id.editCarID:
Cars unCarro = misCarros.get(getAdapterPosition());
editCar(unCarro);
break;
case R.id.deleteCarID:
int position = getAdapterPosition();
unCarro = misCarros.get(position);
deleteCar(unCarro.getCarID());
break;
}
}
public void deleteCar (final int id)
{
final DatabaseHandler db = new DatabaseHandler(context);
alertBuilder = new AlertDialog.Builder(context);
alertBuilder.setTitle(R.string.confTitle);
// alertBuilder.setIcon(android.R.drawable.alert_dark_frame);
alertBuilder.setMessage(R.string.confMsg);
alertBuilder.setNegativeButton(R.string.noBu, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
alertBuilder.setPositiveButton(R.string.yesBu, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
db.deleteCars(id);
misCarros.remove(getAdapterPosition());
notifyItemRemoved(getAdapterPosition());
dialog.dismiss();
if (db.getCarsCount() <= 0)
{
context.startActivity(new Intent(context,MainActivity.class));
((Activity)context).finish();
}
}
});
dialog = alertBuilder.create();
dialog.show();
}
public void editCar(final Cars car)
{
alertBuilder = new AlertDialog.Builder(context);
LayoutInflater inflater = LayoutInflater.from(context);
final View view = inflater.inflate(R.layout.new_car_popup,null);
final EditText carName = view.findViewById(R.id.nCarName);
final EditText carManuf = view.findViewById(R.id.nCarManuf);
final EditText DOB = view.findViewById(R.id.nCarDOB);
TextView editCarText = view.findViewById(R.id.textView);
Button editImage = view.findViewById(R.id.addImageID);
final ImageView carImage = view.findViewById(R.id.laImagenaPuta);
final Button editCarButton = view.findViewById(R.id.addCarID);
editImage.setText(R.string.editImageText);
editCarButton.setText(R.string.editCarBu);
editCarText.setText(R.string.editCarText);
carManuf.setHint(R.string.manufHint);
carName.setHint(R.string.nameHint);
DOB.setHint(R.string.DOBHint);
final SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
alertBuilder.setView(view);
dialog = alertBuilder.create();
dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
dialog.show();
SharedPreferences.Editor editor = sharedPreferences.edit();
if(!clicked)
editor.putString("imagePath",null);
editor.apply();
long time = SystemClock.currentThreadTimeMillis();
editImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try{
if (ActivityCompat.checkSelfPermission(context,Manifest.permission.READ_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED){
ActivityCompat.requestPermissions((Activity)context, new String[]{
Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE},
REQUEST_IMAGE_CAPTURE);
}else {
clicked = true;
Intent helperIntent = new Intent(context,IntentHelperActivity.class);
startActivity(context,helperIntent,null);
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
Bitmap image = BitmapFactory.decodeFile(sharedPreferences.getString("imagePath", null));
carImage.setImageBitmap(image);
}
}, 1690);
}
}catch (Exception e)
{
e.printStackTrace();
}
}
});
// alertBuilder.setIcon(android.R.drawable.alert_dark_frame);
//String imagePath ;
//editCarButton.setText(imagePath);
editCarButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final String imagePath = sharedPreferences.getString("imagePath", null);
DatabaseHandler db = new DatabaseHandler(context);
if(!carManuf.getText().toString().isEmpty())
car.setCarManuf(carManuf.getText().toString());
// else{
// Cars miCarro = misCarros.get(getAdapterPosition());
// car.setCarManuf(miCarro.getCarName());
// }
if(!carName.getText().toString().isEmpty())
car.setCarName(carName.getText().toString());
// else{
// Cars miCarro = misCarros.get(getAdapterPosition());
// car.setCarName(miCarro.getCarName());
// }
if(!DOB.getText().toString().isEmpty())
car.setCarModel(DOB.getText().toString());
// else{
// Cars miCarro = misCarros.get(getAdapterPosition());
// car.setCarModel(miCarro.getCarName());
// }
if(imagePath != null)
car.setCarImage(imagePath);
// if (!carName.getText().toString().isEmpty() && !carManuf.getText().toString().isEmpty()
// && !DOB.getText().toString().isEmpty()) {
// if(imagePath != null )
// car.setCarImage(imagePath);
db.updateCars(car);
notifyItemChanged(getAdapterPosition(), car);
//}
// else{
// Toast.makeText(context,R.string.enterSomething,Toast.LENGTH_LONG);
// }
dialog.dismiss();
Intent myIntent = new Intent(context,ListActivity.class);
context.startActivity(myIntent);
((Activity)context).finish();
((Activity) context).finish();
}
});
}
}
}
我已经尝试使用另一个活动 IntentHelperActivity 来帮助我调用startActivityForResult和onActivityResult方法来选择图像，这是类：
package com.hitham.miscarros.Activities;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.SystemClock;
import android.preference.PreferenceManager;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewParent;
import android.widget.ImageView;
import android.widget.Toast;
import com.hitham.miscarros.R;
import com.hitham.miscarros.UI.RecyclerViewAdapter;
public class IntentHelperActivity extends AppCompatActivity {
private ImageView miImagen;
private String imagePath = null;
private Intent galleryIntent;
private Bitmap image;
public IntentHelperActivity() {
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_intent_helper_activtiy);
Bundle bundle = getIntent().getExtras();
galleryIntent = new Intent(Intent.ACTION_PICK,MediaStore.Images
.Media.EXTERNAL_CONTENT_URI);
LayoutInflater inflater = LayoutInflater.from(this);
View view = inflater.inflate(R.layout.new_car_popup,null);
miImagen = view.findViewById(R.id.laImagenaPuta);
startActivityForResult(galleryIntent,1);
}
@Override
public void onBackPressed() {
finish();
super.onBackPressed();
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode)
{
case 1:
if (resultCode == RESULT_OK)
{
Uri selectedImage = data.getData();
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor miCursor = getContentResolver().query(selectedImage,filePathColumn,null,null,null);
miCursor.moveToFirst();
int columnIndex = miCursor.getColumnIndex(filePathColumn[0]);
String filePath = miCursor.getString(columnIndex);
miCursor.close();
imagePath = filePath;
SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString("imagePath",imagePath);
editor.apply();
finish();
}
break;
default:
finish();
}
}
}
IntentHelperActivity帮助我选择了图像并将其发送到上一类，但是导致了两个问题