CODEWITHSUNDEEP
androidandroid-layout
Matthew Vehon
Matthew Vehon

Reputation: 5

Different layouts on orientation change

I have two main.xml files in layout-land and layout-port folders and when the orientation of the phone changes it forces a reload of main.xml. 

@Override
    public void onConfigurationChanged(Configuration configure){
        super.onConfigurationChanged(configure);
        setContentView(R.layout.main);

It works fine in portrait but pressing any of the imagebuttons on the page in landscape causes the app to crash. The imagebuttons all change an image called grid to a different image when pressed. The buttons that open another page work fine in both layouts. Here's a sample of the code.

final ImageView imageView = (ImageView)findViewById(R.id.grid);
// This is an imagebutton
findViewById(R.id.plank).setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                imageView.setImageResource(R.drawable.gridplanks);
            }
    });
// This is a button that brings up a new page
      findViewById(R.id.mcg).setOnClickListener(new OnClickListener() {
             @Override
              public void onClick(View view) {
                 startActivity(new Intent("com.example.minecraftcraftingguide.MCG"));
                 }
});

Is this what you need? New to programming, sorry.

>09-18 22:20:46.688: ERROR/AndroidRuntime(334): FATAL EXCEPTION: main
09-18 22:20:46.688: ERROR/AndroidRuntime(334): java.lang.NullPointerException
09-18 22:20:46.688: ERROR/AndroidRuntime(334):     at com.example.minecraftcraftingguide.Menu$1.onClick(Menu.java:27)
09-18 22:20:46.688: ERROR/AndroidRuntime(334):     at android.view.View.performClick(View.java:2485)
09-18 22:20:46.688: ERROR/AndroidRuntime(334):     at android.view.View$PerformClick.run(View.java:9080)
09-18 22:20:46.688: ERROR/AndroidRuntime(334):     at android.os.Handler.handleCallback(Handler.java:587)
09-18 22:20:46.688: ERROR/AndroidRuntime(334):     at android.os.Handler.dispatchMessage(Handler.java:92)
09-18 22:20:46.688: ERROR/AndroidRuntime(334):     at android.os.Looper.loop(Looper.java:123)
09-18 22:20:46.688: ERROR/AndroidRuntime(334):     at android.app.ActivityThread.main(ActivityThread.java:3683)
09-18 22:20:46.688: ERROR/AndroidRuntime(334):     at java.lang.reflect.Method.invokeNative(Native Method)
09-18 22:20:46.688: ERROR/AndroidRuntime(334):     at java.lang.reflect.Method.invoke(Method.java:507)
09-18 22:20:46.688: ERROR/AndroidRuntime(334):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
09-18 22:20:46.688: ERROR/AndroidRuntime(334):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
09-18 22:20:46.688: ERROR/AndroidRuntime(334):     at dalvik.system.NativeStart.main(Native Method)

Upvotes: 0

Views: 3918

Answers (2)

banzai86
banzai86

Reputation: 747

Do you have a main.xml in your default layout folder or just the two in layout-port and layout-land?

If I were you, I would move the file from layout-port to your default layout folder. Then the app will use the file in layout-land if the app is in landscape folder, and otherwise (if the app is in portrait mode) will use the file in your default folder.

Another hint: Check the spelling in both xml files. Maybe you are missing a character in one of the button id's.

Upvotes: 1

mayank_droid
mayank_droid

Reputation: 1015

You have to decalare ConfigChanges in mainfest, and you dont need to write the setcontentView() in onOnfigurationChanged() method, infact, after declaring in mainfest , you dont need to write anything in your program, the android will automatically get the landscape xml file which resides in layout-land xml file.

Because whenever you call setContentView(), you have to declare its elements again.!!!

Just mention in the mainfest, in this activity tag android:configChanges=keyboardHidden|orientation or Dont write anything in your onConfigChanged() method

Upvotes: 0

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