6.2

今日学习总结

学习时间1.5h代码如下

package com.app.chapter04;

import android.content.ComponentName;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;

import androidx.activity.EdgeToEdge;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;

public class ActStartActivity extends AppCompatActivity implements View.OnClickListener {

    private static final String TAG ="ning";


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Log.d(TAG,"ActStartActivity onCreate");
        EdgeToEdge.enable(this);
        setContentView(R.layout.activity_act_start);
    findViewById(R.id.btn_act_next).setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
//        1.在Intent的构造函数中指定
//      Intent intent = new Intent(this,ActFinishActivity.class);
//
//      2.调用意图对象的setClass方法指定
//      Intent intent  =new Intent();
//      intent.setClass(this,ActFinishActivity.class);
//
        //3.调用意图对象的setComponent方法指定
        Intent intent = new Intent();
        ComponentName component =new ComponentName(this,ActFinishActivity.class);
        intent.setComponent(component);
      startActivity(intent);
    }


    @Override
    protected void onStart() {
        super.onStart();
        Log.d(TAG,"ActStartActivity onStart");
    }


    @Override
    protected void onResume() {
        super.onResume();
        Log.d(TAG,"ActStartActivity onResume");
    }


    @Override
    protected void onPause() {
        super.onPause();
        Log.d(TAG,"ActStartActivity onPause");
    }

    @Override
    protected void onStop() {
        super.onStop();
        Log.d(TAG,"ActStartActivity onStop");
    }


    @Override
    protected void onDestroy() {
        super.onDestroy();
        Log.d(TAG,"ActStartActivity onDestroy");
    }

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".ActStartActivity"
    android:orientation="vertical"
    android:background="@drawable/becautiful01"
    android:gravity="center">

    <Button
        android:id="@+id/btn_act_next"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="跳转到下一个界面"/>