Java 通过Android按钮发送HTTP-POST请求
我必须向Javaservlet发送一个HTTP请求(通过Android按钮) 我被困在我必须把信息(代码)和它必须包含的内容,以发送它 上下文:用户登录-->单击“授予访问权”-->向Java Servlet发送HTTP请求(例如192.168.1.1) 注意:我只是Android的初学者 我知道这与“授予访问权”按钮的ID有关 AndroidManifest:Java 通过Android按钮发送HTTP-POST请求,java,android,xmlhttprequest,Java,Android,Xmlhttprequest,我必须向Javaservlet发送一个HTTP请求(通过Android按钮) 我被困在我必须把信息(代码)和它必须包含的内容,以发送它 上下文:用户登录-->单击“授予访问权”-->向Java Servlet发送HTTP请求(例如192.168.1.1) 注意:我只是Android的初学者 我知道这与“授予访问权”按钮的ID有关 AndroidManifest: <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:a
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.mertino11.ourapplication">
<uses-permission android:name="android.permission.INTERNET" />
<application
android:name=".FireApp"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true">
<activity
android:name=".MainActivity"
android:theme="@style/AppTheme">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<activity
android:name=".AccountActivity"
android:theme="@style/AppTheme" />
</application>
</manifest>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:baselineAligned="false">
<ImageView
android:layout_width="match_parent"
android:layout_height="163dp"
app:srcCompat="@drawable/snetech"
android:id="@+id/imageView" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textEmailAddress"
android:ems="10"
android:id="@+id/emailField"
android:hint="Email"
android:paddingTop="20dp" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:ems="10"
android:id="@+id/passwordField"
android:hint="Password"
android:fontFamily="sans-serif"
android:paddingTop="20dp" />
<Button
android:text="Login"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/loginBtn"
android:paddingTop="20dp" />
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_account"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.mertino11.ourapplication.AccountActivity">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="logout"
android:id="@+id/logout"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="16dp" />
<Button
android:text="Grant Access"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/grantAccess"
android:layout_marginBottom="70dp"
android:layout_above="@+id/logout"
android:layout_centerHorizontal="true" />
<TextView
android:text="Main Menu"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textView"
android:textStyle="normal|bold"
android:textSize="30sp"
android:textAlignment="center"
android:fontFamily="sans-serif"
android:textAllCaps="false"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
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 {
private EditText mEmailField;
private EditText mPasswordField;
private Button mLoginBtn;
private FirebaseAuth mAuth;
private FirebaseAuth.AuthStateListener mAuthListener;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mAuth = FirebaseAuth.getInstance();
mEmailField = (EditText) findViewById(R.id.emailField);
mPasswordField = (EditText) findViewById(R.id.passwordField);
mLoginBtn = (Button) findViewById(R.id.loginBtn);
mAuthListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
if(firebaseAuth.getCurrentUser() != null) {
startActivity(new Intent(MainActivity.this, AccountActivity.class));
}
}
};
mLoginBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startSignIn();
}
});
}
@Override
protected void onStart() {
super.onStart();
mAuth.addAuthStateListener(mAuthListener);
}
private void startSignIn() {
String email = mEmailField.getText().toString();
String password = mPasswordField.getText().toString();
if(TextUtils.isEmpty(email) || TextUtils.isEmpty(password)) {
Toast.makeText(MainActivity.this, "Fields are empty!", Toast.LENGTH_LONG).show();
} else {
mAuth.signInWithEmailAndPassword(email, password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if(!task.isSuccessful()){
Toast.makeText(MainActivity.this, "Sign In Problem!", Toast.LENGTH_LONG).show();
}
}
});
}
}
}
import android.app.Application;
import com.firebase.client.Firebase;
public class FireApp extends Application {
@Override
public void onCreate() {
super.onCreate();
Firebase.setAndroidContext(this);
}
}
main活动:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.mertino11.ourapplication">
<uses-permission android:name="android.permission.INTERNET" />
<application
android:name=".FireApp"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true">
<activity
android:name=".MainActivity"
android:theme="@style/AppTheme">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<activity
android:name=".AccountActivity"
android:theme="@style/AppTheme" />
</application>
</manifest>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:baselineAligned="false">
<ImageView
android:layout_width="match_parent"
android:layout_height="163dp"
app:srcCompat="@drawable/snetech"
android:id="@+id/imageView" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textEmailAddress"
android:ems="10"
android:id="@+id/emailField"
android:hint="Email"
android:paddingTop="20dp" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:ems="10"
android:id="@+id/passwordField"
android:hint="Password"
android:fontFamily="sans-serif"
android:paddingTop="20dp" />
<Button
android:text="Login"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/loginBtn"
android:paddingTop="20dp" />
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_account"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.mertino11.ourapplication.AccountActivity">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="logout"
android:id="@+id/logout"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="16dp" />
<Button
android:text="Grant Access"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/grantAccess"
android:layout_marginBottom="70dp"
android:layout_above="@+id/logout"
android:layout_centerHorizontal="true" />
<TextView
android:text="Main Menu"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textView"
android:textStyle="normal|bold"
android:textSize="30sp"
android:textAlignment="center"
android:fontFamily="sans-serif"
android:textAllCaps="false"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
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 {
private EditText mEmailField;
private EditText mPasswordField;
private Button mLoginBtn;
private FirebaseAuth mAuth;
private FirebaseAuth.AuthStateListener mAuthListener;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mAuth = FirebaseAuth.getInstance();
mEmailField = (EditText) findViewById(R.id.emailField);
mPasswordField = (EditText) findViewById(R.id.passwordField);
mLoginBtn = (Button) findViewById(R.id.loginBtn);
mAuthListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
if(firebaseAuth.getCurrentUser() != null) {
startActivity(new Intent(MainActivity.this, AccountActivity.class));
}
}
};
mLoginBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startSignIn();
}
});
}
@Override
protected void onStart() {
super.onStart();
mAuth.addAuthStateListener(mAuthListener);
}
private void startSignIn() {
String email = mEmailField.getText().toString();
String password = mPasswordField.getText().toString();
if(TextUtils.isEmpty(email) || TextUtils.isEmpty(password)) {
Toast.makeText(MainActivity.this, "Fields are empty!", Toast.LENGTH_LONG).show();
} else {
mAuth.signInWithEmailAndPassword(email, password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if(!task.isSuccessful()){
Toast.makeText(MainActivity.this, "Sign In Problem!", Toast.LENGTH_LONG).show();
}
}
});
}
}
}
import android.app.Application;
import com.firebase.client.Firebase;
public class FireApp extends Application {
@Override
public void onCreate() {
super.onCreate();
Firebase.setAndroidContext(this);
}
}
为了能够通过HTTP进行通信,您需要一个HTTP客户端框架,该框架可以在您指定的URL上发出HTTP请求,并使用您指定的HTTP方法和参数/主体 Android的一个非常流行的框架是改型。 改装后,您可以使用所需的任何参数进行POST呼叫
查看如何设置改装以及如何在他们的页面上创建POST调用:据我所知,您希望在单击按钮
@+id/grantAccess
时发布HTTP POST。
首先,您必须在AccountActivity
类中添加OnClickListener。就像你在注销按钮上做的那样。在onClick方法中,您现在可以发出HTTP请求。因此,您必须创建一个AyncTask
,因为您不允许通过应用程序主线程进行HTTP调用
public class PostTask extends AsyncTask<Void, Void, Void> {
private static final String ENDPOINT = "http://yourendpoint/";
PostTask() {
//add here your variables that you need
}
@Override
protected void doInBackground(Void... params) {
this.doPost();
}
@Override
protected void onPostExecute() {
//do what you want when you are finished
}
private void doPost(){
final RestTemplate restTemplate = new RestTemplate();
final RequestObject request = new RequestObject();
//parse the request to a format what is used by your endpoint (json, xml,..)
HttpEntity<String> entity = new HttpEntity<String>(objectToString(request), createHeaders(authResp));
final HttpEntity<String> response = restTemplate.exchange(ENDPOINT, HttpMethod.POST, entity, String.class);
}
}
正如tudor07所说,您可以使用各种http客户端框架。在本例中,我使用Spring for Android()实现了这一点。在显示的链接中,还描述了如何将此库添加到项目中。有关异步处理的更多详细说明,请访问