布局没啥特别的
<EditText android:id="@+id/embedded_text_editor"
                    android:layout_width="fill_parent"
                    android:layout_height="fill_parent"
                    android:layout_weight="1.0"
                    android:autoText="true"
                    android:capitalize="sentences"
                    android:hint="@string/type_to_compose_text_enter_to_send"
                    android:textCursorDrawable="@null"
     android:textColor="@android:color/black"
                    android:maxLines="4"
                    android:nextFocusRight="@+id/send_button"
                    android:gravity="top" />

int newHeight = 200;         //注意这里，到底是用ViewGroup还是用LinearLayout或者是FrameLayout，主要是看你这个EditTex         //控件所在的父控件是啥布局，如果是LinearLayout，那么这里就要改成LinearLayout.LayoutParams         ViewGroup.LayoutParams lp = editText.getLayoutParams();         lp.height = newHeight;         editText.setLayoutParams(lp);