自己定义Android Dialog

private void showDialog()
{
mDialog = new Dialog(this);
mDialog.setCanceledOnTouchOutside(true);

Window dialogWindow = mDialog.getWindow();
dialogWindow.setBackgroundDrawable(new ColorDrawable(0));
dialogWindow.setContentView(R.layout.set_public_client_dialog);

mDialog.show();

Button cancelbtn = (Button) dialogWindow.findViewById(R.id.cancelbtn);
cancelbtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
mDialog.dismiss();
}
});

Button confirmbtn = (Button) dialogWindow.findViewById(R.id.confirmbtn);
confirmbtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
mDialog.dismiss();
}
});

}

<?xml version="1.0" encoding="utf-8"?

>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="306dp"
android:layout_height="262dp"
android:layout_gravity="center"
android:background="@drawable/followupdialog_306_202" >

<FrameLayout
android:layout_width="140dp"
android:layout_height="32dp"
android:layout_marginLeft="-4dp"
android:layout_marginTop="7dp"
android:background="@drawable/redrobin_89_32" >

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:layout_marginLeft="13dp"
android:layout_marginTop="4dp"
android:text="@string/set_public_reason"
android:textColor="@color/white"
android:textSize="15sp" />
</FrameLayout>

<EditText
android:id="@+id/et_additional_reason"
android:layout_width="257dp"
android:layout_height="33dp"
android:layout_above="@+id/bottom_btns"
android:layout_centerHorizontal="true"
android:layout_marginBottom="3dp"
android:background="@drawable/redline_257_33"
android:hint="@string/et_additional_reason_hint"
android:paddingLeft="5dp"
android:singleLine="true"
android:textSize="14sp" />

<LinearLayout
android:id="@+id/bottom_btns"
android:layout_width="299dp"
android:layout_height="44dp"
android:layout_alignParentBottom="true"
android:layout_marginBottom="6dp"
android:layout_marginLeft="7dp"
android:layout_marginRight="1dp"
android:orientation="horizontal" >

<Button
android:id="@+id/cancelbtn"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="@drawable/followupdialogbtn"
android:text="@string/cancel"
android:textColor="@color/black" />

<ImageView
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="0.01"
android:background="@color/linecolor" />

<Button
android:id="@+id/confirmbtn"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="@drawable/followupdialogbtn"
android:text="@string/confirm"
android:textColor="@color/black" />
</LinearLayout>

<ImageView
android:layout_width="299dp"
android:layout_height="0.5dp"
android:layout_above="@id/bottom_btns"
android:layout_marginLeft="7dp"
android:background="@color/linecolor" />

</RelativeLayout>