Transition from one action to another. Android activity.

Question

I want to move from one action to another (using a virtual device). When I click on the button to move, a dialog box appears in my emulator with the image unfortunately SMS1 has stopped working (SMS1 is my application name).

Can someone help me fix my code?

MainActivity.java:

 package com.example.sms1; import android.os.Bundle; import android.app.Activity; import android.content.Intent; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.TextView; public class MainActivity extends Activity implements OnClickListener { Button b1; TextView tv1; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); b1 = (Button) findViewById(R.id.button1); tv1 = (TextView) findViewById(R.id.textView1); b1.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; } @Override public void onClick(View v) { // TODO Auto-generated method stub Intent i = new Intent(getApplicationContext(),NextActivity.class); startActivity(i); setContentView(R.layout.avtivity_next); } } 

Here is NextActivity

 package com.example.sms1; import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android.widget.TextView; public class NextActivity extends Activity { TextView tv1; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.avtivity_next); tv1 = (TextView) findViewById(R.id.textView1); } @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; } } 

Manifest.xml

 <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.sms1" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.example.sms1.MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest> 

NextActivityLayout

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" 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=".NextActivity" > <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="next activity" /> </RelativeLayout> 

MainActivity Layout

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" 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=".MainActivity" > <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/hello_world" /> <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/textView1" android:layout_marginTop="80dp" android:layout_toRightOf="@+id/textView1" android:text="Button" /> </RelativeLayout> 

Answer 1

You have not defined NextActivity in the AndroidManifest.xml file.

Add these lines to the android manifest after the </activity> . It should work.

 <activity android:name=".NextActivity" > </activity> 

final code will be

 <application android:allowBackup="true" android:icon="@drawable/app_icon" android:label="@string/app_name" > <activity android:name=".MainActivity" android:label="Main Activity" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".NextActivity" > </activity> </application> 

Answer 2

You must first use this code in the MainActivity.java class

 @Override public void onClick(View v) { // TODO Auto-generated method stub Intent i = new Intent(getApplicationContext(),NextActivity.class); startActivity(i); } 

You can convey the intention in this way.

second

add the correct entry to the manifest.xml file.

 <activity android:name=".NextActivity" /> 

Now let's see what happens.

Answer 3

Just add NextActivity to the Manifest.XML file

 <activity android:name="com.example.sms1.NextActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> </intent-filter> </activity> 

Answer 4

button1 in action2

code recorded in step 2

 button1.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { // starting background task to update product Intent fp=new Intent(getApplicationContext(),activity1.class); startActivity(fp); } }); 

This can help

Answer 5

1) put setContentView(R.layout.avtivity_next); to the next-activity onCreate () method, just like this (main) onCreate () activity

2) if you have not yet defined the following activity in the application manifest file, follow these steps:

 <application android:allowBackup="true" android:icon="@drawable/app_icon" android:label="@string/app_name" > <activity android:name=".MainActivity" android:label="Main Activity" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".NextActivity" android:label="Next Activity" > </activity> </application> 

You need to complete the second step every time you create a new action, otherwise your application will crash

Answer 6

When you need to go from one page to another in android changes made in 2 files

 Intent intentSignUP = new Intent(this,SignUpActivity.class); startActivity(intentSignUP); 

add activity to androidManifest file as well

  <activity android:name=".SignUpActivity"></activity> 

Answer 7

setContentView (R.layout.avtivity_next);

I think this line of code should be carried over to the next activity ...

Answer 8

 public void onClick(View v) { startActivity(new Intent(getApplicationContext(), Next.class)); } 

this is a direct way to move the second action, and there is no need to call

Answer 9

Below code works fine with Android 4.3:

 Intent i = new Intent(this,MainActivity2.class); startActivity(i); 

Answer 10

This is mainly due to unregistered activity in the manifest file as "NextActivity" First register NextActivity in the manifest, for example

 <activity android:name=".NextActivity"> 

then use the code where you want

 Intent intent=new Intent(MainActivity.this,NextActivity.class); startActivity(intent); 

where you should call NextActivity ..

Answer 11

First you need to declare the action in the manifest. It is important. You can add this internal application like this.

Answer 12

Register your Java class in the Android manifest file

After that write this code when you click

 startActivity(new intent(MainActivity.this,NextActivity.class)); 

Answer 13

 @Override public void onClick(View v) { // TODO Auto-generated method stub Intent intent = new Intent(Activity1.this,Activity2.class); startActivity(intent); } 

Answer 14

You can do

 Intent i = new Intent(classname.this , targetclass.class); startActivity(i);