如何一个TextView添加到的LinearLayout动态Android中?
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25-09-2019 - |
题
我尝试将TextView
添加到LinearLayout
动态如在下面的代码,但是当我运行该应用程序没有出现?
setContentView(R.layout.advanced);
m_vwJokeLayout=(LinearLayout) this.findViewById(R.id.m_vwJokeLayout);
m_vwJokeEditText=(EditText) this.findViewById(R.id.m_vwJokeEditText);
m_vwJokeButton=(Button) this.findViewById(R.id.m_vwJokeButton);
TextView tv=new TextView(this);
tv.setText("test");
this.m_vwJokeLayout.addView(tv);
这是什么问题?
解决方案
LayoutParams lparams = new LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
TextView tv=new TextView(this);
tv.setLayoutParams(lparams);
tv.setText("test");
this.m_vwJokeLayout.addView(tv);
您可以修改 lparams 根据您的需要。
其他提示
下面是这个问题的未来观众更普遍的答案。我们将会使布局低于:
方法1:添加的TextView到现有的LinearLayout
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.dynamic_linearlayout);
LinearLayout linearLayout = (LinearLayout) findViewById(R.id.ll_example);
// Add textview 1
TextView textView1 = new TextView(this);
textView1.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT));
textView1.setText("programmatically created TextView1");
textView1.setBackgroundColor(0xff66ff66); // hex color 0xAARRGGBB
textView1.setPadding(20, 20, 20, 20);// in pixels (left, top, right, bottom)
linearLayout.addView(textView1);
// Add textview 2
TextView textView2 = new TextView(this);
LayoutParams layoutParams = new LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
layoutParams.gravity = Gravity.RIGHT;
layoutParams.setMargins(10, 10, 10, 10); // (left, top, right, bottom)
textView2.setLayoutParams(layoutParams);
textView2.setText("programmatically created TextView2");
textView2.setTextSize(TypedValue.COMPLEX_UNIT_SP, 18);
textView2.setBackgroundColor(0xffffdbdb); // hex color 0xAARRGGBB
linearLayout.addView(textView2);
}
请注意,对于LayoutParams
您必须为进口指定种类的布局,如
import android.widget.LinearLayout.LayoutParams;
否则,你需要在代码中使用LinearLayout.LayoutParams
。
下面是XML:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/ll_example"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ff99ccff"
android:orientation="vertical" >
</LinearLayout>
方法2:创建两者的LinearLayout和TextView的编程
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// NOTE: setContentView is below, not here
// Create new LinearLayout
LinearLayout linearLayout = new LinearLayout(this);
linearLayout.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT));
linearLayout.setOrientation(LinearLayout.VERTICAL);
linearLayout.setBackgroundColor(0xff99ccff);
// Add textviews
TextView textView1 = new TextView(this);
textView1.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT));
textView1.setText("programmatically created TextView1");
textView1.setBackgroundColor(0xff66ff66); // hex color 0xAARRGGBB
textView1.setPadding(20, 20, 20, 20); // in pixels (left, top, right, bottom)
linearLayout.addView(textView1);
TextView textView2 = new TextView(this);
LayoutParams layoutParams = new LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
layoutParams.gravity = Gravity.RIGHT;
layoutParams.setMargins(10, 10, 10, 10); // (left, top, right, bottom)
textView2.setLayoutParams(layoutParams);
textView2.setText("programmatically created TextView2");
textView2.setTextSize(TypedValue.COMPLEX_UNIT_SP, 18);
textView2.setBackgroundColor(0xffffdbdb); // hex color 0xAARRGGBB
linearLayout.addView(textView2);
// Set context view
setContentView(linearLayout);
}
方法3:以编程一个XML布局添加到另一个XML布局
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.dynamic_linearlayout);
LayoutInflater inflater = (LayoutInflater) getApplicationContext().getSystemService(
Context.LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate(R.layout.dynamic_linearlayout_item, null);
FrameLayout container = (FrameLayout) findViewById(R.id.flContainer);
container.addView(view);
}
下面是dynamic_linearlayout.xml:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/flContainer"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</FrameLayout>
和这里是添加dynamic_linearlayout_item.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/ll_example"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ff99ccff"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#ff66ff66"
android:padding="20px"
android:text="programmatically created TextView1" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#ffffdbdb"
android:layout_gravity="right"
android:layout_margin="10px"
android:textSize="18sp"
android:text="programmatically created TextView2" />
</LinearLayout>
我定制更@Suragch代码。我的输出看起来
我写至停止码的冗余的方法。
TextView createATextView(int layout_widh, int layout_height, int align,
String text, int fontSize, int margin, int padding) {
TextView textView_item_name = new TextView(this);
// LayoutParams layoutParams = new LayoutParams(
// LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
// layoutParams.gravity = Gravity.LEFT;
RelativeLayout.LayoutParams _params = new RelativeLayout.LayoutParams(
layout_widh, layout_height);
_params.setMargins(margin, margin, margin, margin);
_params.addRule(align);
textView_item_name.setLayoutParams(_params);
textView_item_name.setText(text);
textView_item_name.setTextSize(TypedValue.COMPLEX_UNIT_SP, fontSize);
textView_item_name.setTextColor(Color.parseColor("#000000"));
// textView1.setBackgroundColor(0xff66ff66); // hex color 0xAARRGGBB
textView_item_name.setPadding(padding, padding, padding, padding);
return textView_item_name;
}
可以称为像
createATextView(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT, RelativeLayout.ALIGN_PARENT_RIGHT,
subTotal.toString(), 20, 10, 20);
现在你可以动态地添加这一个RelativeLayout的。 LinearLayout中也是一样的,只是增加一个方向。
RelativeLayout primary_layout = new RelativeLayout(this);
LayoutParams layoutParam = new LayoutParams(LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT);
primary_layout.setLayoutParams(layoutParam);
// FOR LINEAR LAYOUT SET ORIENTATION
// primary_layout.setOrientation(LinearLayout.HORIZONTAL);
// FOR BACKGROUND COLOR
primary_layout.setBackgroundColor(0xff99ccff);
primary_layout.addView(createATextView(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT, RelativeLayout.ALIGN_LEFT, list[i],
20, 10, 20));
primary_layout.addView(createATextView(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT, RelativeLayout.ALIGN_PARENT_RIGHT,
subTotal.toString(), 20, 10, 20));
TextView rowTextView = (TextView)getLayoutInflater().inflate(R.layout.yourTextView, null);
rowTextView.setText(text);
layout.addView(rowTextView);
这是我如何使用这样的:
private List<Tag> tags = new ArrayList<>();
if(tags.isEmpty()){
Gson gson = new Gson();
Type listType = new TypeToken<List<Tag>>() {
}.getType();
tags = gson.fromJson(tour.getTagsJSONArray(), listType);
}
if (flowLayout != null) {
if(!tags.isEmpty()) {
Log.e(TAG, "setTags: "+ flowLayout.getChildCount() );
flowLayout.removeAllViews();
for (Tag tag : tags) {
FlowLayout.LayoutParams lparams = new FlowLayout.LayoutParams(FlowLayout.LayoutParams.WRAP_CONTENT, FlowLayout.LayoutParams.WRAP_CONTENT);
lparams.setMargins(PixelUtil.dpToPx(this, 0), PixelUtil.dpToPx(this, 5), PixelUtil.dpToPx(this, 10), PixelUtil.dpToPx(this, 5));// llp.setMargins(left, top, right, bottom);
TextView rowTextView = (TextView) getLayoutInflater().inflate(R.layout.tag, null);
rowTextView.setText(tag.getLabel());
rowTextView.setLayoutParams(lparams);
flowLayout.addView(rowTextView);
}
}
Log.e(TAG, "setTags: after "+ flowLayout.getChildCount() );
}
这是我的命名标签定制的TextView:
<?xml version="1.0" encoding="utf-8"?><TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="10dp"
android:textAllCaps="true"
fontPath="@string/font_light"
android:background="@drawable/tag_shape"
android:paddingLeft="11dp"
android:paddingTop="6dp"
android:paddingRight="11dp"
android:paddingBottom="6dp">
这是我的tag_shape:
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<solid android:color="#f2f2f2" />
<corners android:radius="15dp" />
</shape>
效应:
在其他地方,我将用语言名称textviews从对话框,列表视图:
<强>布局强>:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:id="@+id/layoutTest"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
>
</LinearLayout>
</RelativeLayout>
<强>类文件:
setContentView(R.layout.layout_dynamic);
layoutTest=(LinearLayout)findViewById(R.id.layoutTest);
TextView textView = new TextView(getApplicationContext());
textView.setText("testDynamic textView");
layoutTest.addView(textView);
如果您使用的LinearLayout。其PARAMS应该是“WRAP_CONTENT”在你的布局文件添加动态数据。如果使用匹配或填充父则无法看到输出。
它应该是这样的。
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content" android:layout_height="wrap_content">
<ListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</ListView>
</LinearLayout>
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