android studio 学习-控件TextView,buttom,ImageView

跑马灯
TextView

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

<!--学习的控件-->
    <TextView
        android:id="@+id/textview"  (定位)
        android:text="@string/TextView_1"(显示文字)
        android:textColor="#FF635345"(文字颜色)
        android:textStyle="italic"(文字风格)
        android:textSize="30dp"(文字大小)
        android:shadowColor="#ffff0000"(阴影颜色)
        android:shadowRadius="3.0"(阴影模糊度)
        android:shadowDx="5"(阴影x轴移动度)
        android:shadowDy="5"(阴影y轴移动度)
        android:background="#fff000"(背景颜色)
        android:gravity="bottom"(文字位置)
        android:layout_width="200dp"(控件宽度)
        android:layout_height="200dp"(控件高度)
        android:singleLine="true"(单行输出)
        android:ellipsize="marquee"(省略模式)
        android:marqueeRepeatLimit="marquee_forever"(字母动画播放次数)
        android:focusable="true"(是否获得焦点)
        android:focusableInTouchMode="true"(是否在触屏模式下获得焦点)>
        <requestFocus/>
    </TextView>

</LinearLayout>

buttom

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    >
    <Button
        android:id="@+id/btn"
        android:text="我是按钮"
        android:background="@drawable/btn_image"
        android:layout_width="200dp"
        android:layout_height="100dp"/>

</LinearLayout>

java内容

package com.example.testbuttom;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "leo";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        Button btn = findViewById(R.id.btn);
			
			//点击监听
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
            //在TAG端口打印文字
                Log.e(TAG, "onClick: ");
            }
        });
			//长按监听
        btn.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View view) {
                Log.e(TAG, "onLongClick: ");
                return false;
            }
        });
			//触摸事件
        btn.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
                Log.e(TAG, "onTouch: "+motionEvent.getAction());
                return false;
            }
        });

    }
}

edit_text:

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

    <EditText
        android:drawableLeft="@drawable/ic_baseline_account_circle_24"
        android:padding="30dp"
        android:id="@+id/account"
        android:layout_width="200dp"
        android:layout_height="100dp"
        android:inputType="date"
        android:hint="请输入文字"/>

    <EditText
        android:id="@+id/password"
        android:layout_width="202dp"
        android:layout_height="100dp"
        android:drawableLeft="@drawable/ic_baseline_android_24"
        android:padding="30dp"
        android:hint="请输入密码"
        android:inputType="textPassword" />
    <Button
        android:id="@+id/btn_ok"
        android:layout_width="200dp"
        android:layout_height="100dp"
        android:text="确定"/>


</LinearLayout>

java内容

package com.example.testedit;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "leo";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Button btn = findViewById(R.id.btn_ok);
        EditText account = findViewById(R.id.account);
        EditText password = findViewById(R.id.password);

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String text = password.getText().toString();
                Log.e(TAG, "onClick: "+text);
            }
        });
    }
}

ImageView

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

    <ImageView
        android:layout_width="wrap_content"(不能超过父组的容器宽度)
        android:layout_height="wrap_content"(不能超过父组的容器高度)
        android:maxHeight="200dp"(最宽200dp)
        android:minHeight="500dp"(最高500dp)
        android:adjustViewBounds="true"(允许根据图片调整)
        android:background="@drawable/girl"
        android:scaleType="center"(位置中心)/>


</LinearLayout>
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