安卓3月21日作业 _作业

案头见蠹鱼，犹胜凡俦侣。这篇文章主要讲述安卓3月21日作业相关的知识，希望能为你提供帮助。

作业一，界面设计的代码：
< ?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/activity_main" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:orientation="vertical" android:layout_height="match_parent" android:layout_width="match_parent"> < TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Please choose a flowe you like!" android:singleLine="true" android:ellipsize="marquee" android:marqueeRepeatLimit="marquee_forever" android:focusable="true" android:focusableInTouchMode="true" android:textSize="50dp" /> < ImageView android:layout_width="317dp" android:layout_height="238dp" android:layout_gravity="center" android:id="@+id/hua" /> < RadioGroup android:id="@+id/g1" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_gravity="center_horizontal"> < RadioButton android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="梅花" android:textSize="20dp" android:id="@+id/meihua" /> < RadioButton android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="石榴花" android:textSize="20dp" android:id="@+id/shiliuhua" /> < RadioButton android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="象牙花" android:textSize="20dp" android:id="@+id/xiangyahua" /> < /RadioGroup> < RadioGroup android:id="@+id/g2" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_gravity="center_horizontal"> < RadioButton android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="绣球花" android:textSize="20dp" android:id="@+id/xiuqiuihua" /> < RadioButton android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="玉兰花" android:textSize="20dp" android:id="@+id/yulanhua" /> < RadioButton android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="牡丹花" android:textSize="20dp" android:id="@+id/nudanhua"/> < /RadioGroup> < /LinearLayout>

java代码：

package com.example.woshishen.xuanhuaapplication; import android.media.Image; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.ImageView; import android.widget.RadioButton; import android.widget.RadioGroup; public class MainActivity extends AppCompatActivity { private ImageView H; private RadioButton MH; private RadioButton SLH; private RadioButton XYH; private RadioButton XQH; private RadioButton YLH; private RadioButton MDH; private RadioGroup G1; private RadioGroup G2; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); H = (ImageView) findViewById(R.id.hua); MH = (RadioButton) findViewById(R.id.meihua); SLH = (RadioButton) findViewById(R.id.shiliuhua); XYH = (RadioButton) findViewById(R.id.xiangyahua); XQH = (RadioButton) findViewById(R.id.xiuqiuihua); YLH = (RadioButton) findViewById(R.id.yulanhua); MDH = (RadioButton) findViewById(R.id.nudanhua); G1 = (RadioGroup) findViewById(R.id.g1); G2 = (RadioGroup) findViewById(R.id.g2); G1.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() { @Override public void onCheckedChanged(RadioGroup radioGroup, int i) { if (MH.isChecked()) { H.setImageResource(R.drawable.meihua); G2.clearCheck(); } if (SLH.isChecked()) { H.setImageResource(R.drawable.shiliu); G2.clearCheck(); } if (XYH.isChecked()) { H.setImageResource(R.drawable.xiangya); G2.clearCheck(); }} }); G2.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() { @Override public void onCheckedChanged(RadioGroup radioGroup, int i) { if (XQH.isChecked()) { H.setImageResource(R.drawable.xiuqiu); G1.clearCheck(); } if (YLH.isChecked()) { H.setImageResource(R.drawable.yulan); G1.clearCheck(); } if (MDH.isChecked()) { H.setImageResource(R.drawable.mudan); G1.clearCheck(); }} }); } }

文章图片

文章图片

作业二布局文件：

< ?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/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.example.woshishen.tupianapplication.MainActivity"> < ImageView android:layout_width="104dp" android:layout_height="96dp" android:layout_gravity="center" android:src="https://www.songbingjia.com/android/@drawable/tupian" android:id="@+id/imageView" /> < Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:text="退出" android:id="@+id/tuichu"/> < /LinearLayout>

JAVA代码：

package com.example.woshishen.tupianapplication; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.MotionEvent; import android.view.View; import android.widget.Button; import android.widget.ImageView; import android.widget.Toast; public class MainActivity extends AppCompatActivity { private ImageView TP; private Button TC; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); TP = (ImageView) findViewById(R.id.imageView); TC = (Button) findViewById(R.id.tuichu); TC.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Toast.makeText(MainActivity.this, "再按一次退出按钮", Toast.LENGTH_LONG).show(); TC.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { MainActivity.this.finish(); } }); } }); } @Override public boolean onTouchEvent (MotionEvent event){if (event.getAction() == MotionEvent.ACTION_MOVE) { float x = event.getX(); float y = event.getY(); String la = "X坐标：" + x + ",Y坐标" + y; TP.setX(x - 150); TP.setY(y - 300); Toast.makeText(this,la,Toast.LENGTH_LONG).show(); } return super.onTouchEvent(event); } }