首先，对于任何误解，遗憾，因为英语不是我的母语。我试图在Android Studio中编写我的第一个应用程序。
我的应用做了什么:(至少＆＃39;＆＃39;应该做＆＃39;＆＃39;）：
1：用户登录屏幕为MainActivity 2：如果用户信用为真，则将用户定向到第二个屏幕，即请求表单。 3：用户输入他的姓氏，主题和主题解释。
4：用户CAN也可以从图像按钮上传图片。没有必要。 5,6,7 ....：这部分将被添加到程序中。目前它只有4个步骤：D
现在我的问题， 1：当我运行应用程序时，它从请求表单（第二个活动）开始，即使我在运行之前清理项目。 2：当用户输入名称，对象和说明的一些输入并单击发送按钮时，信息存储在firebase数据库中。但是，当我为图像按钮选择图像时，它不会存储在firebase中。所有身份验证都已设置。
登录屏幕代码
package com.example.jalea.requestingform;
import android.content.Intent;
import android.preference.EditTextPreference;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
public class MainActivity extends AppCompatActivity {
EditText edt_email,edt_sifre;
Button bt_giris;
FirebaseAuth mAuth;
FirebaseAuth.AuthStateListener authStateListener;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
edt_email = (EditText) findViewById(R.id.et_mail);
edt_sifre = (EditText) findViewById(R.id.et_sifre);
bt_giris = (Button) findViewById(R.id.btn_giris);
mAuth = FirebaseAuth.getInstance();
authStateListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
if(firebaseAuth.getCurrentUser() !=null){
Intent intent = new Intent(MainActivity.this,RequestActivity.class);
startActivity(intent);
//finish();
Log.w("1 : ","2.activity'e geçildi");
}
else{
Log.w("1 : ", "onAuthStateChanged:çıkış yaptı");
}
}
};
bt_giris.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
SignIn();
}
});
}
@Override
protected void onStart() {
super.onStart();
mAuth.addAuthStateListener(authStateListener);
}
@Override
protected void onStop() {
super.onStop();
if(authStateListener != null) {
mAuth.removeAuthStateListener(authStateListener);
}
}
public void SignIn(){
String email = edt_email.getText().toString();
String sifre = edt_sifre.getText().toString();
if(TextUtils.isEmpty(email) || TextUtils.isEmpty(sifre)){
Toast.makeText(MainActivity.this,"Kullanıcı adı veya şifre alanı boş",Toast.LENGTH_LONG).show();
}
else{
mAuth.signInWithEmailAndPassword(email,sifre).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if(!task.isSuccessful()){
Toast.makeText(MainActivity.this,"Kullanıcı adı veya şifre hatası ",Toast.LENGTH_LONG).show();
}
/**if(task.isSuccessful()){
Intent intent = new Intent(MainActivity.this,RequestActivity.class);
startActivity(intent);**/
}
});
}
}
}
申请表格代码
package com.example.jalea.requestingform;
import android.content.Intent;
import android.net.Uri;
import android.provider.ContactsContract;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.Toast;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.storage.FirebaseStorage;
import com.google.firebase.storage.StorageReference;
import com.google.firebase.storage.UploadTask;
import java.io.File;
import java.net.URI;
public class RequestActivity extends AppCompatActivity {
FirebaseAuth mAuth;
FirebaseDatabase database;
DatabaseReference databaseReference;
FirebaseAuth.AuthStateListener authStateListener;
Button btn_cikis,btn_gonder;
ImageButton imgbutton;
EditText et_isim,et_konu,et_aciklama;
StorageReference storageReference;
Uri uri=null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_request);
btn_cikis = (Button) findViewById(R.id.btn_cikis);
storageReference = FirebaseStorage.getInstance().getReference();
et_isim= (EditText) findViewById(R.id.et_isim);
et_konu= (EditText) findViewById(R.id.et_konu);
et_aciklama = (EditText) findViewById(R.id.et_text);
database = FirebaseDatabase.getInstance();
btn_gonder = (Button) findViewById(R.id.btn_Send);
btn_cikis.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mAuth = FirebaseAuth.getInstance();
mAuth.signOut();
startActivity(new Intent(RequestActivity.this,MainActivity.class));
}
});
btn_gonder.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String isim = et_isim.getText().toString();
String konu = et_konu.getText().toString();
String aciklama = et_aciklama.getText().toString();
Uri file = Uri.fromFile(new File("path/to/images/rivers.jpg"));
databaseReference = database.getReference("Kullanicilar").child(isim);
if (!TextUtils.isEmpty(isim) && !TextUtils.isEmpty(konu) && !TextUtils.isEmpty(aciklama)) {
databaseReference.child("adSoyad").setValue(isim);
databaseReference.child("Konu").setValue(konu);
databaseReference.child("Aciklama").setValue(aciklama);
Toast.makeText(RequestActivity.this, "Talep gönderildi", Toast.LENGTH_LONG).show();
StorageReference filePath = storageReference.child("Resim").child(uri.getLastPathSegment());
filePath.putFile(uri)
.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
@SuppressWarnings("VisibleForTests")
Uri downloadUrl = taskSnapshot.getDownloadUrl();
Toast.makeText(RequestActivity.this, "Resim eklendi", Toast.LENGTH_LONG).show();
}
});
filePath.putFile(uri).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Log.w("İmage hata : ", e);
}
});
}
}
});
}
public void imageButtonClicked(View View){
Intent gallery_intent = new Intent(Intent.ACTION_GET_CONTENT);
gallery_intent.setType("image/*");
startActivityForResult(gallery_intent,2);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == 2 && resultCode == RESULT_OK){
uri = data.getData();
imgbutton = (ImageButton) findViewById(R.id.imageButton);
imgbutton.setImageURI(uri);
}
}
}
的Manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.jalea.requestingform">
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"></uses-permission>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".RequestActivity"></activity>
</application>
</manifest>
答案 0 :(得分：0)
首先：
只有在您编写此
之后，它才会从您的第二个活动开始 if(firebaseAuth.getCurrentUser() !=null){
Intent intent = new Intent(MainActivity.this,RequestActivity.class);
startActivity(intent);
//finish();
Log.w("1 : ","2.activity'e geçildi");
}
肯定您可能已登录并存储了auth以让用户直接转到下一个活动
对于你的第二个问题，我能够像这样做
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == ConstantsCustomGallery.REQUEST_CODE && resultCode == Activity.RESULT_OK && data != null) {
//The array list has the image paths of the selected images
ArrayList<Image> images = data.getParcelableArrayListExtra(ConstantsCustomGallery.INTENT_EXTRA_IMAGES);
boolean showMinMax = true;
final MaterialDialog dialog = new MaterialDialog.Builder(this)
.title("Please wait")
.content("This won't take too long")
.progress(false, images.size(), showMinMax)
.show();
for (int i = 0; i < images.size(); i++) {
Uri uri = Uri.fromFile(new File(images.get(i).path));
StorageReference storage = FirebaseStorage.getInstance().getReference();
String Fpath = getFileName(uri) ;
//Uri file = Uri.fromFile(new File("path/to/images/rivers.jpg"));
StorageReference riversRef = storage.child(FirebaseAuth.getInstance().getCurrentUser().getEmail()+"/images/"+Fpath);
riversRef.putFile(uri)
.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
// Get a URL to the uploaded content
int maxUploading = dialog.getMaxProgress();
dialog.incrementProgress(1);
if(dialog.getCurrentProgress() == dialog.getMaxProgress()){
dialog.dismiss();
new MaterialDialog.Builder(HomePageActivity.this)
.title("DONE")
.content("Congratulations")
.show();
}
Uri downloadUrl = taskSnapshot.getDownloadUrl();
DatabaseReference mDatabase = FirebaseDatabase.getInstance().getReference();
String key = mDatabase.child("users").push().getKey();
Map<String, Object> postValues = new HashMap<String, Object>();
postValues.put("/user-profile/" + FirebaseAuth.getInstance().getCurrentUser().getEmail()
.substring(0, FirebaseAuth.getInstance().getCurrentUser().getEmail().indexOf("@"))+"/user-images/"+key,downloadUrl.toString());
postValues.put("/user-profile/" + FirebaseAuth.getInstance().getCurrentUser().getEmail()
.substring(0, FirebaseAuth.getInstance().getCurrentUser().getEmail().indexOf("@"))+"/imagesuploaded/",maxUploading);
mDatabase.updateChildren(postValues);
}
})
.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception exception) {
// Handle unsuccessful uploads
// ...
}
});
}
dialog.setContent("Hurray!!!!");
}
}
答案 1 :(得分：0)
要从您想要的活动启动应用程序，请在活动的manifest.xml文件中输入以下代码
<activity
android:name="SpinnerActivity"
android:screenOrientation="portrait">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
答案 2 :(得分：0)
您的应用程序会绕过MainActivity，因为您有以下代码：
authStateListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
if(firebaseAuth.getCurrentUser() !=null){
Intent intent = new Intent(MainActivity.this,RequestActivity.class);
startActivity(intent);
//finish();
Log.w("1 : ","2.activity'e geçildi");
}
else{
Log.w("1 : ", "onAuthStateChanged:çıkış yaptı");
}
}
};
该代码检查用户是否已登录，然后跳过MainActivity并直接进入RequestActivity。如果您希望用户每次打开应用程序时登录，请删除该代码。
关于第二个问题，请查看以下示例代码：
private void startPosting() {
mProgress.setMessage("Posting... ");
final String title_val = mPostTitle.getText().toString();
final String desc_val = mPostDesc.getText().toString();
final String cat_val = mPostCat.getSelectedItem().toString();
final String currency_val = mPostCurrency.getSelectedItem().toString();
final String amount_val = mPostAmount.getText().toString();
final String offer_val = mPostOffer.getText().toString();
final String pNumber_val = mPostPNumber.getText().toString();
if(!TextUtils.isEmpty(title_val) && !TextUtils.isEmpty(desc_val) && !TextUtils.isEmpty(cat_val)&& !TextUtils.isEmpty(currency_val) && !TextUtils.isEmpty(amount_val) &&!TextUtils.isEmpty(offer_val) && !TextUtils.isEmpty(pNumber_val) && mImageUri != null ){
mProgress.show();
StorageReference filepath = mStorage.child("Classifieds_Images").child(mImageUri.getLastPathSegment());
filepath.putFile(mImageUri).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
final Uri downloadUrl = taskSnapshot.getDownloadUrl();
final DatabaseReference newPost = mDatabase.push();
mDatabaseUsers.child(mCurrentUser.getUid()).addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
newPost.child("name").setValue(title_val);
newPost.child("desc").setValue(desc_val);
newPost.child("category").setValue(cat_val);
newPost.child("currency").setValue(currency_val);
newPost.child("amount").setValue(amount_val);
newPost.child("offer").setValue(offer_val);
newPost.child("phone number").setValue(pNumber_val);
newPost.child("latitude").setValue(mLastKnownLocation.getLatitude());
newPost.child("longitude").setValue(mLastKnownLocation.getLongitude());
newPost.child("timestamp").setValue(ServerValue.TIMESTAMP);
newPost.child("image").setValue(downloadUrl.toString());
newPost.child("uid").setValue(mCurrentUser.getUid());
newPost.child("profileImage").setValue(dataSnapshot.child("profile_image").getValue());
newPost.child("username").setValue(dataSnapshot.child("username").getValue()).addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
if(task.isSuccessful()){
startActivity(new Intent(PostActivity.this, MainActivity.class));
}
}
});
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
mProgress.dismiss();
}
});
}
}
@SuppressLint("NewApi")
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case 0:
if (resultCode == RESULT_OK) {
mImageUri = data.getData();
mSelectImage.setImageURI(mImageUri);
CropImage.activity(mImageUri)
.setGuidelines(CropImageView.Guidelines.ON)
.start(this);
}
break;
case 1:
if(resultCode == RESULT_OK){
mImageUri = data.getData();
activity(mImageUri)
.setGuidelines(CropImageView.Guidelines.ON)
.start(this);
mSelectImage.setImageURI(mImageUri);
}
break;
}
if (requestCode == CROP_IMAGE_ACTIVITY_REQUEST_CODE) {
ActivityResult result = getActivityResult(data);
if (resultCode == RESULT_OK) {
mImageUri = result.getUri();
mSelectImage.setImageURI(mImageUri);
} else if (resultCode == CROP_IMAGE_ACTIVITY_RESULT_ERROR_CODE) {
Exception error = result.getError();
}
}
}
private void selectImage() {
final CharSequence[] items = {"Take Photo", "Choose from Library",
"Cancel"};
AlertDialog.Builder builder = new AlertDialog.Builder(
PostActivity.this);
builder.setTitle("Add Photo");
builder.setItems(items, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int item) {
if (items[item].equals("Take Photo")) {
Intent takePicture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePicture.resolveActivity(getPackageManager()) != null) {
startActivityForResult(takePicture, 0);}
} else if (items[item].equals("Choose from Library")) {
Intent pickPhoto = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(pickPhoto , 1);
} else if (items[item].equals("Cancel")) {
dialog.dismiss();
}
}
});
builder.show();
}
希望这有帮助