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    <p>Here is my solution for my special Problem.</p> <p>In case the username wouldn't be found in the db i had to create a RelativeLayout that looks like the xml-generated one.</p> <pre><code>// text view appears on top of the edit text enterNameRequest = new TextView(mainActivity.getApplicationContext()); // fill the view with a string from strings.xml enterNameRequest.setText(mainActivity.getResources().getString(R.string.enterNameRequest)); // edit text appears below text view and above button enterName = new EditText(mainActivity.getApplicationContext()); enterName.setId(667); // button appears at the bottom of the relative layout saveUserName = new Button(mainActivity.getApplicationContext()); saveUserName.setText(mainActivity.getResources().getString(R.string.useUserName)); saveUserName.setId(666); // generate the relative layout RelativeLayout layout = new RelativeLayout(mainActivity.getApplicationContext()); layout.setId(668); // set a background graphic by its id layout.setBackgroundDrawable(mainActivity.getApplicationContext().getResources().getDrawable(R.drawable.background_head_neutral)); // runtime told me that i MUST use width and height parameters! LayoutParams params2 = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT); params2.addRule(RelativeLayout.ABOVE, 666); enterName.setLayoutParams(params2); LayoutParams params3 = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT); params3.addRule(RelativeLayout.ABOVE, 667); enterNameRequest.setLayoutParams(params3); LayoutParams params4 = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT); params4.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, 668); saveUserName.setLayoutParams(params4); // add views layout.addView(enterNameRequest); layout.addView(enterName); layout.addView(saveUserName); /* todo: set button action */ mainActivity.setContentView(layout); </code></pre> <p>What i found out additionally: It is not so good to manipulate the layout manually from within java!</p> <p>You should better use a new Activity and set a new layout in it.</p> <p>This way, the application-code is readable a lot better!</p> <p>I even tried to set several layouts (not manually, but wit setContentView) in one activity, and it turned out that i didn't know where what was accessing what else... Also, i had a great problem in adding onClickListeners... so you better use -- android:onClick="myButtonMethod" -- in your button tag in the xml and have a method in your according activity, which uses the layout, like this:</p> <pre><code>public void myButtonMethod(View v){ // do stuff } </code></pre> <p>This improves performance because you are not using additional Listeners - but you use the already available Listener that is bound to your activity in every case.</p>
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    1. POHow to align a dynamically create UserInterface using RelativeLayout in Android
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