1
我想動態地從Java構建一個視圖,我很困惑爲什麼這不起作用。TextView沒有出現在RelativeLayout中
TextView displayText
根本沒有顯示在屏幕上。我不明白爲什麼它不會像用戶輸入他們的名字那樣。
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
RelativeLayout ceriLayout = new RelativeLayout(this);
Button genButton = new Button(this);
genButton.setText("Press here");
genButton.setId(0);
TextView displayView = new TextView(this);
displayView.setText("What is going to go here huh");
displayView.setId(1);
EditText nameView = new EditText(this);
nameView.setText("Enter your name");
nameView.setId(2);
RelativeLayout.LayoutParams button = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT
);
RelativeLayout.LayoutParams name = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT
);
RelativeLayout.LayoutParams display;
display = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT
);
button.addRule(RelativeLayout.CENTER_HORIZONTAL);
button.addRule(RelativeLayout.CENTER_VERTICAL);
display.addRule(RelativeLayout.CENTER_HORIZONTAL);
display.addRule(RelativeLayout.ABOVE, nameView.getId());
name.addRule(RelativeLayout.CENTER_HORIZONTAL);
name.addRule(RelativeLayout.ABOVE, genButton.getId());
ceriLayout.addView(genButton, button);
ceriLayout.addView(nameView,name);
setContentView(ceriLayout);
}
}
哇,慢下來的人。你是否在代碼上設計你的整個佈局?你知道你可以使用XML文件作爲佈局嗎? –
'ceriLayout.addView(displayView ...'?它在哪裏? –