android 代碼裏給控件里加子控件

原創

Android_yyx

2020-02-21 23:10

實例路勁：AddWidget

控件裏嵌入子控件，彈窗嵌入xml文件

主xml文件：

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
    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:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:showIn="@layout/activity_main"
    tools:context="com.yyx.addwidget.MainActivity">

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <LinearLayout
            android:id="@+id/add_linear"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center_horizontal"
            android:orientation="vertical">

        </LinearLayout>
    </ScrollView>
</android.support.constraint.ConstraintLayout>

java代碼：

package com.yyx.addwidget;

import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.widget.LinearLayout;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private LinearLayout add_linear;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        add_linear = (LinearLayout) findViewById(R.id.add_linear);

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(MainActivity.this,"加控件",Toast.LENGTH_LONG).show();
                addButton();
            }
        });
    }

    private void addButton(){
        LayoutInflater inflater = getLayoutInflater();
        final View viewUrl = inflater.inflate(R.layout.activity_main_button, null);
        LinearLayout.LayoutParams UrL = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
        viewUrl.setLayoutParams(UrL);
        add_linear.addView(viewUrl);
    }



    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }



    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();

        if (id == R.id.action_settings) {
            Toast.makeText(MainActivity.this,"彈窗",Toast.LENGTH_LONG).show();
            //彈出框,實現頁面嵌套
            LayoutInflater inflater = getLayoutInflater();
            View layout = inflater.inflate(R.layout.activity_main_button, null);
            AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
            final AlertDialog dialog = builder.create();
            dialog.setView(layout);
            Window window = dialog.getWindow();

            window.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
            dialog.show();
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

activity_main_button.xml 文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="列隊"
        android:layout_gravity="center_horizontal"/>
</LinearLayout>