Java 如何在另一个活动中成功发生的事件中使按钮从“不可见”变为“可见”
我的activity_main.xml文件中最初有V1-V8可见和R1-R8不可见的按钮 My MainActivity.java文件Java 如何在另一个活动中成功发生的事件中使按钮从“不可见”变为“可见”,java,android,button,android-activity,visibility,Java,Android,Button,Android Activity,Visibility,我的activity_main.xml文件中最初有V1-V8可见和R1-R8不可见的按钮 My MainActivity.java文件 package com.example.buttonvtor; import com.example.buttonvtor.MainActivity; import com.example.buttonvtor.Payment1Activity; import com.example.buttonvtor.Payment2Activity; import co
package com.example.buttonvtor;
import com.example.buttonvtor.MainActivity;
import com.example.buttonvtor.Payment1Activity;
import com.example.buttonvtor.Payment2Activity;
import com.example.buttonvtor.Payment3Activity;
import com.example.buttonvtor.Payment4Activity;
import com.example.buttonvtor.Payment5Activity;
import com.example.buttonvtor.Payment6Activity;
import com.example.buttonvtor.Payment7Activity;
import com.example.buttonvtor.Payment8Activity;
import com.example.buttonvtor.R;
import android.os.Bundle;
import android.app.Activity;
import android.content.DialogInterface;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends Activity implements OnClickListener{
Button bv1;
Button bv2;
Button bv3;
Button bv4;
Button bv5;
Button bv6;
Button bv7;
Button bv8;
Button br1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bv1 = (Button)findViewById(R.id.button1);
bv2 = (Button)findViewById(R.id.button2);
bv3 = (Button)findViewById(R.id.button3);
bv4 = (Button)findViewById(R.id.button4);
bv5 = (Button)findViewById(R.id.button5);
bv6 = (Button)findViewById(R.id.button6);
bv7 = (Button)findViewById(R.id.button7);
bv8 = (Button)findViewById(R.id.button8);
br1 = (Button)findViewById(R.id.r1);
bv1.setOnClickListener(this);
bv2.setOnClickListener(this);
bv3.setOnClickListener(this);
bv4.setOnClickListener(this);
bv5.setOnClickListener(this);
bv6.setOnClickListener(this);
bv7.setOnClickListener(this);
bv8.setOnClickListener(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public void onClick(View v) {
switch(v.getId()){
case R.id.button1:
Toast.makeText(MainActivity.this,"You clicked on block 1",Toast.LENGTH_LONG).show();
startActivityForResult(new Intent(MainActivity.this,Payment1Activity.class),1);
break;
case R.id.button2:
Toast.makeText(MainActivity.this,"You clicked on block 2",Toast.LENGTH_LONG).show();
startActivityForResult(new Intent(MainActivity.this,Payment2Activity.class),2);
break;
case R.id.button3:
Toast.makeText(MainActivity.this,"You clicked on block 3",Toast.LENGTH_LONG).show();
startActivityForResult(new Intent(MainActivity.this,Payment3Activity.class),3);
break;
case R.id.button4:
Toast.makeText(MainActivity.this,"You clicked on block 4",Toast.LENGTH_LONG).show();
startActivityForResult(new Intent(MainActivity.this,Payment4Activity.class),4);
break;
case R.id.button5:
Toast.makeText(MainActivity.this,"You clicked on block 5",Toast.LENGTH_LONG).show();
startActivityForResult(new Intent(MainActivity.this,Payment5Activity.class),5);
break;
case R.id.button6:
Toast.makeText(MainActivity.this,"You clicked on block 6",Toast.LENGTH_LONG).show();
startActivityForResult(new Intent(MainActivity.this,Payment6Activity.class),6);
break;
case R.id.button7:
Toast.makeText(MainActivity.this,"You clicked on block 7",Toast.LENGTH_LONG).show();
startActivityForResult(new Intent(MainActivity.this,Payment7Activity.class),7);
break;
case R.id.button8:
Toast.makeText(MainActivity.this,"You clicked on block 8",Toast.LENGTH_LONG).show();
startActivityForResult(new Intent(MainActivity.this,Payment8Activity.class),8);
break;
}
}
protected void onActivityResult (int requestCode, int resultCode, Intent data)
{
if (requestCode == 1)
{// here you match the number you sent in startActivityForResult
if (resultCode == RESULT_OK)
{
bv1.setVisibility(View.INVISIBLE);
br1.setVisibility(0);
}
// do something
}
}
}
一旦我点击say按钮V1,它就会转到下一个名为Payment1Activity.java的活动,并检查用户的有效性。如果用户有效且付款成功,则返回my MainActivity.java
Payment1Activity.java
package com.example.buttonvtor;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.RemoteViews;
public class Payment1Activity extends Activity {
Button b;
EditText et,pass;
TextView tv;
HttpPost httppost;
StringBuffer buffer;
HttpResponse response;
HttpClient httpclient;
List<NameValuePair> nameValuePairs;
ProgressDialog dialog = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_payment1);
b = (Button)findViewById(R.id.Button01);
et = (EditText)findViewById(R.id.accountno);
pass= (EditText)findViewById(R.id.password);
tv = (TextView)findViewById(R.id.tv);
b.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
dialog = ProgressDialog.show(Payment1Activity.this, "",
"Validating user...", true);
new Thread(new Runnable() {
public void run() {
payment();
}
}).start();
}
});
}
void payment(){
try{
httpclient=new DefaultHttpClient();
httppost= new HttpPost("my url");
//add your data
nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("accno",et.getText().toString().trim()));
nameValuePairs.add(newBasicNameValuePair("bpassword",pass.getText().toString().trim()));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
//Execute HTTP Post Request
response=httpclient.execute(httppost);
ResponseHandler<String> responseHandler = new BasicResponseHandler();
final String response = httpclient.execute(httppost, responseHandler);
System.out.println("Response : " + response);
runOnUiThread(new Runnable() {
public void run() {
tv.setText("Response from PHP : " + response);
dialog.dismiss();
}
});
if(response.startsWith("User Found")){
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(Payment1Activity.this,"Payment Successful", Toast.LENGTH_SHORT).show();
Toast.makeText(Payment1Activity.this,"You reserved block 1",Toast.LENGTH_LONG).show();
}
});
Intent returnIntent = new Intent();
returnIntent.putExtra("Payment Successful",RESULT_OK);
setResult(RESULT_OK,returnIntent);
finish();
startActivity(new Intent(Payment1Activity.this, MainActivity.class));
}else{
showAlert();
}
}catch(Exception e){
dialog.dismiss();
System.out.println("Exception : " + e.getMessage());
}
}
public void showAlert(){
Payment1Activity.this.runOnUiThread(new Runnable() {
public void run() {
AlertDialog.Builder builder = new AlertDialog.Builder(Payment1Activity.this);
builder.setTitle("Payment Error.");
builder.setMessage("User not Found.")
.setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
}
});
AlertDialog alert = builder.create();
alert.show();
}
});
}
}
package com.example.buttonvor;
导入java.util.ArrayList;
导入java.util.List;
导入org.apache.http.HttpResponse;
导入org.apache.http.NameValuePair;
导入org.apache.http.client.HttpClient;
导入org.apache.http.client.ResponseHandler;
导入org.apache.http.client.entity.UrlEncodedFormEntity;
导入org.apache.http.client.methods.HttpPost;
导入org.apache.http.impl.client.BasicResponseHandler;
导入org.apache.http.impl.client.DefaultHttpClient;
导入org.apache.http.message.BasicNameValuePair;
导入android.app.Activity;
导入android.app.AlertDialog;
导入android.app.ProgressDialog;
导入android.content.DialogInterface;
导入android.content.Intent;
导入android.os.Bundle;
导入android.view.view;
导入android.view.view.OnClickListener;
导入android.widget.Button;
导入android.widget.EditText;
导入android.widget.TextView;
导入android.widget.Toast;
导入android.widget.remoteview;
公共类付费1活动扩展活动{
按钮b;
编辑文本,通过;
文本视图电视;
HttpPost-HttpPost;
字符串缓冲区;
HttpResponse响应;
HttpClient-HttpClient;
列出nameValuePairs;
ProgressDialog=null;
@凌驾
创建时的公共void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_payment1);
b=(按钮)findViewById(R.id.Button01);
et=(EditText)findViewById(R.id.accountno);
pass=(EditText)findViewById(R.id.password);
tv=(TextView)findviewbyd(R.id.tv);
b、 setOnClickListener(新的OnClickListener(){
@凌驾
公共void onClick(视图v){
dialog=ProgressDialog.show(Payment1Activity.this,“,
“正在验证用户…”,true);
新线程(newrunnable()){
公开募捐{
付款();
}
}).start();
}
});
}
无效付款(){
试试{
httpclient=新的DefaultHttpClient();
httppost=新的httppost(“我的url”);
//添加您的数据
nameValuePairs=新的ArrayList(2);
添加(新的BasicNameValuePair(“accno”,et.getText().toString().trim());
添加(newBasicNameValuePair(“bpassword”,pass.getText().toString().trim());
setEntity(新的UrlEncodedFormEntity(nameValuePairs));
//执行HTTP Post请求
response=httpclient.execute(httppost);
ResponseHandler ResponseHandler=新BasicResponseHandler();
最终字符串响应=httpclient.execute(httppost,responseHandler);
System.out.println(“响应:+Response”);
runOnUiThread(新的Runnable(){
公开募捐{
setText(“来自PHP的响应:+Response”);
dialog.dismise();
}
});
if(response.startsWith(“用户找到”)){
runOnUiThread(新的Runnable(){
公开募捐{
Toast.makeText(Payment1Activity.this,“Payment Successful”,Toast.LENGTH_SHORT.show();
Toast.makeText(Payment1Activity.this,“youreserved block 1”,Toast.LENGTH_LONG.show();
}
});
Intent returnIntent=新Intent();
returnIntent.putExtra(“付款成功”,结果正常);
setResult(结果正常,返回意图);
完成();
startActivity(新意图(Payment1Activity.this、MainActivity.class));
}否则{
showarert();
}
}捕获(例外e){
dialog.dismise();
System.out.println(“异常:+e.getMessage());
}
}
公开作废showAlert(){
Payment1Activity.this.runOnUiThread(新的Runnable(){
公开募捐{
AlertDialog.Builder=新建AlertDialog.Builder(付款1活动.this);
builder.setTitle(“付款错误”);
builder.setMessage(“未找到用户”)
.setCancelable(错误)
.setPositiveButton(“确定”,新的DialogInterface.OnClickListener(){
public void onClick(DialogInterface对话框,int-id){
}
});
AlertDialog alert=builder.create();
alert.show();
}
});
}
}
所以我想要这样的东西,当我的Payment1Activity.java说Payment1Activity成功并将用户重定向到主页时,我的V1按钮应该不可见,R1应该可见。我尝试了不同的排列和组合来实现这一点,但没有帮助。请帮忙。如有任何建议,我们将不胜感激。谢谢。您可以使用
startActivityForResult()
开始第二个活动,并在onActivityResult()
中捕捉第一个活动的结果,例如在主活动中使用startActivityForResult
而不是startActivity
。这允许您将值从新活动返回到主活动。例如:
主要活动
startActivityForResult(new Intent(MainActivity.this,Payment3Activity.class), 3);
这里,数字3是您定义的一个数字,它允许您稍后识别结果。在您的付款活动中,您可能会在某个时候(例如,当您取消活动时)进行付款活动
结果将发送到MainActivity,您必须覆盖onActivityResult()以获得结果
protected void onActivityResult (int requestCode, int resultCode, Intent data)
{
if (requestCode == 3) // here you match the number you sent in startActivityForResult
if (resultcode == RESULT_OK)
// do something
}
你能告诉我看一下我的Payment1Activity.java文件,我应该把setResult(RESULT_OK)放在哪里吗?你可以在
startActivity(newintent(Payment1Activity.this,MainActivity.class))之前试试代码>我还有一个疑问,在Christian给出的链接中,它说如果我想发送一些东西
protected void onActivityResult (int requestCode, int resultCode, Intent data)
{
if (requestCode == 3) // here you match the number you sent in startActivityForResult
if (resultcode == RESULT_OK)
// do something
}