java - android Layout_gravity(不是重力)和 Layout_marginTop(不是 marginTop)以编程方式

Question

我需要以编程方式创建一个使用 ImageView 和 TextView 的 Toast，它出现在屏幕中间，我已经做到了。

这就是我想要的渲染

(带心形的黑色方 block 是ImageView图片，“J'aime”是TextView)

XML 代码:

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >

<ImageView
    android:id="@+id/toastImage"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginRight="1dp"
    android:src="@drawable/like" />

<TextView
    android:id="@+id/toastText"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal"
    android:layout_marginTop="85dp"
    android:text="J'aime !"
    android:textColor="#FFFFFF" />

</FrameLayout>

这是我用 JAVA 代码呈现的:

Java 代码:

FrameLayout toastLayout = new FrameLayout(this);
LinearLayout.LayoutParams llp = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
toastLayout.setLayoutParams(llp);

 ImageView toastImg = new ImageView(this);
 Bitmap toastBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.like);
 toastImg.setImageBitmap(toastBitmap);

 TextView toastText = new TextView(this);
 toastText.setText("J'aime !");

 LinearLayout.LayoutParams toastTextLp = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, Gravity.CENTER_HORIZONTAL);
 toastTextLp.setMargins(0, 85, 0, 0);
 toastText.setLayoutParams(toastTextLp);

 toastLayout.addView(toastImg);
 toastLayout.addView(toastText);

 Toast toast = new Toast(this);
 toast.setView(toastLayout);

我尝试过使用相对布局或线性布局，但框架布局对此效果更好。所以我有一个问题:

什么是 JAVA 等价物:

    android:layout_gravity="center_horizontal"
    android:layout_marginTop="85dp" 

?因为这显然不是:

    LinearLayout.LayoutParams toastTextLp = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, Gravity.CENTER_HORIZONTAL);
    toastTextLp.setMargins(0, 85, 0, 0);

需要帮助。

Answer 1

试试这个:

RelativeLayout toastLayout = new RelativeLayout(this);
    RelativeLayout.LayoutParams llp = new RelativeLayout.LayoutParams(
            LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
    toastLayout.setLayoutParams(llp);

    ImageView toastImg = new ImageView(this);
    Bitmap toastBitmap = BitmapFactory.decodeResource(getResources(),
            R.drawable.like);
    toastImg.setImageBitmap(toastBitmap);

    TextView toastText = new TextView(this);
    toastText.setText("J'aime !");

    RelativeLayout.LayoutParams toastTextLp = new RelativeLayout.LayoutParams(
            LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
    toastTextLp.addRule(RelativeLayout.CENTER_HORIZONTAL);
    toastTextLp.setMargins(0, 85, 0, 0);
    toastText.setLayoutParams(toastTextLp);

    toastLayout.addView(toastImg);
    toastLayout.addView(toastText);

    Toast toast = new Toast(this);
    toast.setView(toastLayout);