Android 以编程方式使用FlexboxLayout
我在尝试使用创建简单界面时遇到了一些问题。 我在.xml文件中创建了视图,所有操作都按预期进行,但是当我尝试以编程方式创建相同的视图时,我无法设置Android 以编程方式使用FlexboxLayout,android,flexbox,android-flexboxlayout,Android,Flexbox,Android Flexboxlayout,我在尝试使用创建简单界面时遇到了一些问题。 我在.xml文件中创建了视图,所有操作都按预期进行,但是当我尝试以编程方式创建相同的视图时,我无法设置布局\u flexBasisPercent。 我正在努力实现这样的目标: 以下是xml代码: <com.google.android.flexbox.FlexboxLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="htt
布局\u flexBasisPercent
。
我正在努力实现这样的目标:
以下是xml代码:
<com.google.android.flexbox.FlexboxLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:flexDirection="row"
tools:context=".MainActivity">
<com.google.android.flexbox.FlexboxLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:flexDirection="row"
app:layout_flexBasisPercent="30%"
app:layout_order="2">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="@string/lorem"/>
</com.google.android.flexbox.FlexboxLayout>
<com.google.android.flexbox.FlexboxLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:flexDirection="row"
app:layout_flexBasisPercent="70%"
app:layout_order="1" >
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:src="@drawable/random"/>
</com.google.android.flexbox.FlexboxLayout>
有人能找到错误吗?或者我做错了什么
谢谢。通读您的代码有点困难;我建议将其重构为更小的方法,以便更容易地进行推理。尽管如此,我看到了一些问题: 这应该是对fb.setFlexDirection()的调用 在这里,您创建了一个
LayoutParams
对象,该对象具有最初在“右”子对象FlexboxLayout
上具有的弹性基础和顺序值,但随后您将这些LayoutParams
设置为TextView
此外,您无意中再次调用了setLayoutDirection()
,而不是setFlexDirection()
这里也有同样的问题
下面是一个工作活动,它完成了您在图像中发布的内容:
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FlexboxLayout root = createRootView();
setContentView(root);
FlexboxLayout right = createRightFlexbox();
TextView rightText = createTextView();
right.addView(rightText);
root.addView(right);
FlexboxLayout left = createLeftFlexbox();
ImageView leftImage = createImageView();
left.addView(leftImage);
root.addView(left);
}
private FlexboxLayout createRootView() {
ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(MATCH_PARENT, MATCH_PARENT);
FlexboxLayout flexbox = new FlexboxLayout(this);
flexbox.setLayoutParams(params);
flexbox.setFlexDirection(FlexDirection.ROW);
return flexbox;
}
private FlexboxLayout createRightFlexbox() {
FlexboxLayout.LayoutParams params = new FlexboxLayout.LayoutParams(WRAP_CONTENT, WRAP_CONTENT);
params.setFlexBasisPercent(0.3f);
params.setOrder(2);
FlexboxLayout flexbox = new FlexboxLayout(this);
flexbox.setLayoutParams(params);
flexbox.setFlexDirection(FlexDirection.ROW);
return flexbox;
}
private TextView createTextView() {
ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(MATCH_PARENT, MATCH_PARENT);
TextView textView = new TextView(this);
textView.setLayoutParams(params);
textView.setText(R.string.lorem);
return textView;
}
private FlexboxLayout createLeftFlexbox() {
FlexboxLayout.LayoutParams params = new FlexboxLayout.LayoutParams(WRAP_CONTENT, WRAP_CONTENT);
params.setFlexBasisPercent(0.7f);
params.setOrder(1);
FlexboxLayout flexbox = new FlexboxLayout(this);
flexbox.setLayoutParams(params);
flexbox.setFlexDirection(FlexDirection.ROW);
return flexbox;
}
private ImageView createImageView() {
ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(MATCH_PARENT, MATCH_PARENT);
ImageView imageView = new ImageView(this);
imageView.setLayoutParams(params);
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setImageResource(R.drawable.random);
return imageView;
}
}
通过将代码拆分为多个方法,可以更轻松地查看应用于哪些视图的布局参数。此外,您还可以在顶层看到屏幕的整体结构。您是否需要专门使用
FlexboxLayout
?从您发布的“所需”图像来看,这看起来像是您只需使用线性布局即可完成的操作!是的,我需要使用FlexboxLayout。我必须创建更复杂的视图,但我必须从这样一个最简单的视图开始。非常感谢@BenP!显然,我的代码一团糟,我认为将flex基值设置为“60”而不是“0.6”是这里的主要问题。再次感谢你。
fb.setLayoutDirection(FlexDirection.ROW);
FlexboxLayout.LayoutParams lpRight =
new FlexboxLayout.LayoutParams(
FlexboxLayout.LayoutParams.MATCH_PARENT,
FlexboxLayout.LayoutParams.MATCH_PARENT);
lpRight.setFlexBasisPercent(30f);
lpRight.setOrder(2);
lpRight.setLayoutDirection(FlexDirection.ROW);
// Right subregions contains a Textview
TextView tv = new TextView(this);
tv.setLayoutParams(lpRight);
FlexboxLayout.LayoutParams lpLeft =
new FlexboxLayout.LayoutParams(
FlexboxLayout.LayoutParams.MATCH_PARENT,
FlexboxLayout.LayoutParams.MATCH_PARENT);
lpLeft.setFlexBasisPercent(70f);
lpLeft.setOrder(1);
lpLeft.setLayoutDirection(FlexDirection.ROW);
// Left subregion contains an Imageview
ImageView iv = new ImageView(this);
iv.setLayoutParams(lpLeft);
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FlexboxLayout root = createRootView();
setContentView(root);
FlexboxLayout right = createRightFlexbox();
TextView rightText = createTextView();
right.addView(rightText);
root.addView(right);
FlexboxLayout left = createLeftFlexbox();
ImageView leftImage = createImageView();
left.addView(leftImage);
root.addView(left);
}
private FlexboxLayout createRootView() {
ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(MATCH_PARENT, MATCH_PARENT);
FlexboxLayout flexbox = new FlexboxLayout(this);
flexbox.setLayoutParams(params);
flexbox.setFlexDirection(FlexDirection.ROW);
return flexbox;
}
private FlexboxLayout createRightFlexbox() {
FlexboxLayout.LayoutParams params = new FlexboxLayout.LayoutParams(WRAP_CONTENT, WRAP_CONTENT);
params.setFlexBasisPercent(0.3f);
params.setOrder(2);
FlexboxLayout flexbox = new FlexboxLayout(this);
flexbox.setLayoutParams(params);
flexbox.setFlexDirection(FlexDirection.ROW);
return flexbox;
}
private TextView createTextView() {
ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(MATCH_PARENT, MATCH_PARENT);
TextView textView = new TextView(this);
textView.setLayoutParams(params);
textView.setText(R.string.lorem);
return textView;
}
private FlexboxLayout createLeftFlexbox() {
FlexboxLayout.LayoutParams params = new FlexboxLayout.LayoutParams(WRAP_CONTENT, WRAP_CONTENT);
params.setFlexBasisPercent(0.7f);
params.setOrder(1);
FlexboxLayout flexbox = new FlexboxLayout(this);
flexbox.setLayoutParams(params);
flexbox.setFlexDirection(FlexDirection.ROW);
return flexbox;
}
private ImageView createImageView() {
ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(MATCH_PARENT, MATCH_PARENT);
ImageView imageView = new ImageView(this);
imageView.setLayoutParams(params);
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setImageResource(R.drawable.random);
return imageView;
}
}