安卓第五.6次作业
package com.example.test; import androidx.appcompat.app.AlertDialog; import androidx.appcompat.app.AppCompatActivity; import android.content.DialogInterface; import android.os.Bundle; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void onBackPressed(){ final AlertDialog dialog; AlertDialog.Builder builder=new AlertDialog.Builder(this) .setTitle("普通对话框") .setIcon(R.mipmap.ic_launcher) .setMessage("是否确定退出应用：") .setPositiveButton("是", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); MainActivity.this.finish(); } }) .setNegativeButton("否", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }); dialog=builder.create(); dialog.show(); } }
2.
<?xml version="1.0" encoding="UTF-8"?>
<module context=".Main3Activity" external.linked.project.id="test" external.linked.project.path="$MODULE_DIR$" external.root.project.path="$MODULE_DIR$" external.system.id="GRADLE" layout_height="match_parent" layout_width="match_parent" orientation="vertical" type="JAVA_MODULE" version="4">
<component name="FacetManager">
<facet type="java-gradle" name="Java-Gradle">
<configuration>
<option name="BUILD_FOLDER_PATH" value="$MODULE_DIR$/build" />
<option name="BUILDABLE" value="false" />
</configuration>
</facet>
</component>
<component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_7" inherit-compiler-output="true">
<exclude-output />
<content url="file://$MODULE_DIR$">
<excludeFolder url="file://$MODULE_DIR$/.gradle" />
</content>
<orderEntry type="inheritedJdk" />
<orderEntry type="sourceFolder" forTests="false" />
</component>
</module>
import android.os.Bundle; import android.app.Activity; import android.app.AlertDialog; import android.app.AlertDialog.Builder; import android.content.DialogInterface; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.Toast; public class MainActivity extends Activity implements OnClickListener { private int num0=0; private int num1[]={0,1}; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); findViewById(R.id.bt).setOnClickListener(this); } @Override public void onClick(View v) { // TODO Auto-generated method stub AlertDialog.Builder builder=new AlertDialog.Builder(this) .setTitle("性别") .setSingleChoiceItems(new String[]{"男","女"}, -1, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub num0=which; } }) .setPositiveButton("是",new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub if(num0==0){ Toast.makeText(MainActivity.this, "您选择的是男", Toast.LENGTH_LONG).show(); }else{ Toast.makeText(MainActivity.this, "您选择的是女", Toast.LENGTH_SHORT).show(); } dialog.dismiss(); } }) .setNegativeButton("否", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub dialog.dismiss(); } }); AlertDialog dialog=builder.create(); dialog.show();
3.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
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"
tools:context=".MainActivity"
android:background="#00BCD4">
<TextView
android:layout_width="wrap_content"
android:layout_height="35dp"
android:text="1.TextView显示文本信息"
android:textStyle="italic"
android:textColor="#FFFFFF"
android:layout_marginTop="20dp"
android:layout_marginLeft="50dp"
android:textSize="30sp"/>
<Button
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_marginLeft="20dp"
android:layout_marginTop="60dp"
android:layout_marginRight="20dp"
android:text="2.按钮"
android:textColor="#FFFFFF"
android:textSize="30sp" />
<EditText
android:layout_width="match_parent"
android:layout_height="60dp"
android:text="3.编辑框:请输入信息"
android:textSize="30sp"
android:layout_marginTop="120dp"
android:textColor="#FFFFFF"
android:layout_marginLeft="35dp"/>
<RadioGroup
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:orientation="horizontal"/>
<RadioButton
android:id="@+id/rb_1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="4.男"
android:textSize="30sp"
android:layout_marginTop="180dp"
android:textColor="#FFFFFF"
android:layout_marginLeft="35dp"/>
<RadioButton
android:id="@+id/rb_2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="女"
android:layout_toRightOf="@id/rb_1"
android:textSize="30sp"
android:layout_marginTop="180dp"
android:textColor="#FFFFFF"
android:layout_marginLeft="35dp"/>
<CheckBox
android:id="@+id/cb_1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="电脑"
android:textColor="#FFFFFF"
android:textSize="30sp"
android:layout_marginTop="230dp"
android:layout_marginLeft="35dp"/>
<CheckBox
android:id="@+id/cb_2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="手机"
android:textColor="#FFFFFF"
android:textSize="30sp"
android:layout_below="@id/cb_1"
android:layout_marginTop="10dp"
android:layout_marginLeft="35dp"/>
</RelativeLayout>
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout 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:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <TextView android:id="@+id/gw" android:layout_width="match_parent" android:layout_height="40dp" android:text="购物商城" android:background="#2196F3" android:textSize="25sp" android:gravity="center"/> <ListView android:id="@+id/lv" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_below="@id/gw"/> </RelativeLayout> 复制代码 复制代码 <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent" android:padding="15dp"> <ImageView android:id="@+id/iv" android:layout_width="100dp" android:layout_height="80dp" android:layout_centerVertical="true"/> <RelativeLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerVertical="true" android:layout_marginLeft="10dp" android:layout_toRightOf="@id/iv"> <TextView android:id="@+id/title" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="桌子" android:textSize="20sp" android:textColor="#4B4343"/> <TextView android:id="@+id/tv_p" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="价格" android:textSize="20sp" android:textColor="#03A9F4" android:layout_below="@id/title" android:layout_marginTop="10dp"/> <TextView android:id="@+id/price" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="1800" android:textSize="20sp" android:textColor="#2196F3" android:layout_below="@id/title" android:layout_toRightOf="@id/tv_p" android:layout_marginTop="10dp"/> </RelativeLayout> </RelativeLayout>
package com.example.chap; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.ListView; import android.widget.BaseAdapter; import android.widget.TextView; public class MainActivity extends AppCompatActivity { private ListView mListView; private String [] titles={"桌子","苹果","蛋糕","线衣"}; private String [] prices={"1800元","10元/kg","300元","350元"}; private int [] icons={R.drawable.table,R.drawable.apple,R.drawable.cake,R.drawable.wireclothes}; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mListView = (ListView) findViewById(R.id.lv); MyBaseAdapter myAdapter = new MyBaseAdapter(); mListView.setAdapter(myAdapter); } class MyBaseAdapter extends BaseAdapter{ @Override public int getCount() { return titles.length; } @Override public Object getItem(int i) { return titles[i]; } @Override public long getItemId(int i) { return i; } @Override public View getView(int i, View view, ViewGroup viewGroup) { View view1= View.inflate(MainActivity.this,R.layout.activity_main2,null); TextView title = (TextView)view1.findViewById(R.id.title); TextView price = (TextView)view1.findViewById(R.id.price); ImageView iv = (ImageView)view1.findViewById(R.id.iv); title.setText(titles[i]); price.setText(prices[i]); iv.setBackgroundResource(icons[i]); return view; } } }
