Android(安卓)动态添加View 并设置id
16lz
2022-03-07
主页面布局（main_activity.xml）
LinearLayout 里面加一个Button，注意这里的LinearLayout要有orientation
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/linear_layout" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:padding="20dp" tools:context="com.yechaoa.addview.MainActivity"> <Button android:id="@+id/btn_add_view" android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="20dp" android:text="点击添加view" android:textSize="20sp"/>LinearLayout>子View布局（layout_item_view.xml）
<?xml version="1.0" encoding="utf-8"?><TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/text_view" android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center" android:padding="20dp" android:textSize="20sp"/>点击动态添加View
先找到要添加的view ，然后添加到LinearLayout中
TextView childView1 = (TextView) LayoutInflater.from(MainActivity.this).inflate(R.layout.layout_item_view, mLinearLayout, false);mLinearLayout.addView(childView1);动态设置id
这里需要先在values文件夹下创建一个ids.xml资源文件
<?xml version="1.0" encoding="utf-8"?><resources> <item name="text_view_1" type="id">text_view_1item> <item name="text_view_2" type="id">text_view_2item> <item name="text_view_3" type="id">text_view_3item> <item name="text_view_4" type="id">text_view_4item> <item name="text_view_5" type="id">text_view_5item>resources>然后通过setId()方法引用这个ids.xml资源文件中的id就行了
textView1.setId(R.id.text_view_1);MainActivity.java
package com.yechaoa.addview;import android.graphics.Color;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.animation.Animation;import android.view.animation.TranslateAnimation;import android.widget.Button;import android.widget.LinearLayout;import android.widget.TextView;public class MainActivity extends AppCompatActivity implements View.OnClickListener { private LinearLayout mLinearLayout; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); } private void initView() { mLinearLayout = findViewById(R.id.linear_layout); Button mBtnAddView = findViewById(R.id.btn_add_view); mBtnAddView.setOnClickListener(this); } private int childCount = 0; @Override public void onClick(View view) { switch (view.getId()) { case R.id.btn_add_view: childCount++; TextView childView1 = (TextView) LayoutInflater.from(MainActivity.this).inflate(R.layout.layout_item_view, mLinearLayout, false); mLinearLayout.addView(childView1); TextView textView1 = childView1.findViewById(R.id.text_view); switch (childCount) { case 1: textView1.setId(R.id.text_view_1); textView1.setText(String.valueOf("第 " + childCount + " 个view")); initAnimation(textView1, 1); break; case 2: textView1.setId(R.id.text_view_2); textView1.setText(String.valueOf("第 " + childCount + " 个view")); initAnimation(textView1, 2); break; case 3: textView1.setId(R.id.text_view_3); textView1.setText(String.valueOf("第 " + childCount + " 个view")); textView1.setTextColor(Color.RED); break; case 4: textView1.setId(R.id.text_view_4); textView1.setText(String.valueOf("第 " + childCount + " 个view")); break; case 5: TextView textView = new TextView(MainActivity.this); textView.setId(R.id.text_view_5); textView.setTextSize(20); textView.setGravity(Gravity.CENTER); textView.setPadding(20, 20, 20, 20); textView.setText(String.valueOf("第 " + childCount + " 个view")); textView.setTextColor(Color.BLUE); mLinearLayout.addView(textView); break; } break; } } private void initAnimation(TextView textView, int position) { switch (position) { case 1: TranslateAnimation mLeftAnimation1 = new TranslateAnimation(Animation.RELATIVE_TO_SELF, -1.0f, Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF, 0.0f); mLeftAnimation1.setDuration(500); textView.startAnimation(mLeftAnimation1); textView.animate().alpha(1); break; case 2: TranslateAnimation mLeftAnimation2 = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 1.0f, Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF, 0.0f); mLeftAnimation2.setDuration(500); textView.startAnimation(mLeftAnimation2); textView.animate().alpha(1); break; } }}关于动画：Android Animation动画
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