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copied!<pre><code>public class TestActivity extends Activity { private RelativeLayout mRelativeLayout; private RelativeLayout mRelativeLayout2; private ImageView mImageView; private ScrollView mScrollView; private TextView TV1; private TextView TV2; private TextView TV3; private TextView TV4; private Button B1; private Button B2; private Button B3; private Button B4; private RelativeLayout.LayoutParams lp; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mRelativeLayout = new RelativeLayout(this); setContentView(mRelativeLayout); mImageView = new ImageView(this); mImageView.setId(1); RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT); lp.addRule(RelativeLayout.ALIGN_PARENT_TOP); mImageView.setImageResource(R.drawable.ic_launcher); mRelativeLayout.addView(mImageView, lp); mScrollView = new ScrollView(this); RelativeLayout.LayoutParams lp2 = new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT); lp2.addRule(RelativeLayout.BELOW, mImageView.getId()); mRelativeLayout.addView(mScrollView, lp2); mRelativeLayout2 = new RelativeLayout(this); int itemcounts = mRelativeLayout2.getChildCount(); mScrollView.addView(mRelativeLayout2); TV1 = new TextView(this); TV1.setId(2); TV1.setTextSize(20); TV1.setText("Im a Text View. The First"); mRelativeLayout2.addView(TV1); B1 = new Button(this); B1.setId(3); RelativeLayout.LayoutParams bl1 = new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT); bl1.addRule(RelativeLayout.BELOW, TV1.getId()); B1.setText("Im a Button. The First"); B1.setTextSize(25); mRelativeLayout2.addView(B1, bl1); TV2 = new TextView(this); RelativeLayout.LayoutParams tvl2 = new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT); tvl2.addRule(RelativeLayout.BELOW, B1.getId()); TV2.setId(4); TV2.setTextSize(20); TV2.setText("Im a Text View. The Second"); mRelativeLayout2.addView(TV2, tvl2); B2 = new Button(this); B2.setId(5); RelativeLayout.LayoutParams bl2 = new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT); bl2.addRule(RelativeLayout.BELOW, TV2.getI()); B2.setText("Im a Button. The Second"); B2.setTextSize(25); mRelativeLayout2.addView(B2, bl2); TV3 = new TextView(this); TV3.setId(6); RelativeLayout.LayoutParams tvl3 = new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT); tvl3.addRule(RelativeLayout.BELOW, B2.getId()); TV3.setTextSize(20); TV3.setText("Im a Text View. The Third"); mRelativeLayout2.addView(TV3, tvl3); B3 = new Button(this); B3.setId(7); RelativeLayout.LayoutParams bl3 = new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT); bl3.addRule(RelativeLayout.BELOW, TV3.getId()); B3.setText("Im a Button. The Third"); B3.setTextSize(25); mRelativeLayout2.addView(B3, bl3); TV4 = new TextView(this); TV4.setId(8); RelativeLayout.LayoutParams tvl4 = new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT); tvl4.addRule(RelativeLayout.BELOW, B3.getId()); TV4.setTextSize(20); TV4.setText("Im a Text View. The Fourth"); mRelativeLayout2.addView(TV4, tvl4); if (itemcounts < 4) { lp = new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT); lp.addRule(RelativeLayout.CENTER_IN_PARENT); } if (itemcounts > 4) { lp = new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT); lp.addRule(RelativeLayout.ALIGN_PARENT_TOP); } } } </code></pre> <p>try this</p>

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