diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..fd45b12
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,11 @@
+*.iml
+.gradle
+/local.properties
+/.idea/caches/build_file_checksums.ser
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
diff --git a/.idea/codeStyles/Project.xml b/.idea/codeStyles/Project.xml
new file mode 100644
index 0000000..30aa626
--- /dev/null
+++ b/.idea/codeStyles/Project.xml
@@ -0,0 +1,29 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/.idea/gradle.xml b/.idea/gradle.xml
new file mode 100644
index 0000000..7ac24c7
--- /dev/null
+++ b/.idea/gradle.xml
@@ -0,0 +1,18 @@
+
+
+
+
+
+
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 0000000..e0d5b93
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,38 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/.idea/runConfigurations.xml b/.idea/runConfigurations.xml
new file mode 100644
index 0000000..7f68460
--- /dev/null
+++ b/.idea/runConfigurations.xml
@@ -0,0 +1,12 @@
+
+
+
+
+
+
\ No newline at end of file
diff --git a/app/.gitignore b/app/.gitignore
new file mode 100644
index 0000000..796b96d
--- /dev/null
+++ b/app/.gitignore
@@ -0,0 +1 @@
+/build
diff --git a/app/build.gradle b/app/build.gradle
new file mode 100644
index 0000000..a9681a3
--- /dev/null
+++ b/app/build.gradle
@@ -0,0 +1,28 @@
+apply plugin: 'com.android.application'
+
+android {
+ compileSdkVersion 28
+ defaultConfig {
+ applicationId "me.jj97181818.ch04_ezcounter"
+ minSdkVersion 21
+ targetSdkVersion 28
+ versionCode 1
+ versionName "1.0"
+ testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+ }
+ buildTypes {
+ release {
+ minifyEnabled false
+ proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+ }
+ }
+}
+
+dependencies {
+ implementation fileTree(dir: 'libs', include: ['*.jar'])
+ implementation 'com.android.support:appcompat-v7:28.0.0'
+ implementation 'com.android.support.constraint:constraint-layout:1.1.3'
+ testImplementation 'junit:junit:4.12'
+ androidTestImplementation 'com.android.support.test:runner:1.0.2'
+ androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
+}
diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
new file mode 100644
index 0000000..f1b4245
--- /dev/null
+++ b/app/proguard-rules.pro
@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+# http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+# public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
diff --git a/app/src/androidTest/java/me/jj97181818/ch04_ezcounter/ExampleInstrumentedTest.java b/app/src/androidTest/java/me/jj97181818/ch04_ezcounter/ExampleInstrumentedTest.java
new file mode 100644
index 0000000..d9712d4
--- /dev/null
+++ b/app/src/androidTest/java/me/jj97181818/ch04_ezcounter/ExampleInstrumentedTest.java
@@ -0,0 +1,26 @@
+package me.jj97181818.ch04_ezcounter;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see Testing documentation
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+ @Test
+ public void useAppContext() {
+ // Context of the app under test.
+ Context appContext = InstrumentationRegistry.getTargetContext();
+
+ assertEquals("me.jj97181818.ch04_ezcounter", appContext.getPackageName());
+ }
+}
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
new file mode 100644
index 0000000..d99ed0d
--- /dev/null
+++ b/app/src/main/AndroidManifest.xml
@@ -0,0 +1,21 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/app/src/main/java/me/jj97181818/ch04_ezcounter/MainActivity.java b/app/src/main/java/me/jj97181818/ch04_ezcounter/MainActivity.java
new file mode 100644
index 0000000..c9ec3f7
--- /dev/null
+++ b/app/src/main/java/me/jj97181818/ch04_ezcounter/MainActivity.java
@@ -0,0 +1,70 @@
+package me.jj97181818.ch04_ezcounter;
+
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+public class MainActivity extends AppCompatActivity
+implements View.OnClickListener, View.OnLongClickListener {
+
+ TextView txv;
+ Button btn1;
+ Button btn2;
+ Button btn3;
+ int counter = 0;
+
+ @Override
+ protected void onCreate(Bundle savedInstanceState) {
+ super.onCreate(savedInstanceState);
+ setContentView(R.layout.activity_main);
+
+ txv = (TextView) findViewById(R.id.textView);
+ btn1 = (Button) findViewById(R.id.button1);
+ btn2 = (Button) findViewById(R.id.button2);
+ btn3 = (Button) findViewById(R.id.button3);
+
+ btn1.setOnClickListener(this);
+ btn1.setOnLongClickListener(this);
+ btn2.setOnClickListener(this);
+ btn2.setOnLongClickListener(this);
+ btn3.setOnClickListener(this);
+ btn3.setOnLongClickListener(this);
+ txv.setOnLongClickListener(this);
+ }
+ //短按
+ @Override
+ public void onClick(View v) {
+ // + 1
+ if (v.getId() == R.id.button1) {
+ txv.setText(String.valueOf(++counter));
+ }
+ // + 1
+ else if (v.getId() == R.id.button2) {
+ txv.setText(String.valueOf(--counter));
+ }
+ else if (v.getId() == R.id.button3) {
+ finish();
+ }
+ }
+
+ //長按
+ @Override
+ public boolean onLongClick(View v) {
+
+ if (v.getId() == R.id.textView) { //歸零
+ counter = 0;
+ txv.setText("0");
+ }
+ else if (v.getId() == R.id.button1){ // + 2
+ counter += 2;
+ txv.setText(String.valueOf(counter));
+ }
+ else {
+ counter -= 2;
+ txv.setText(String.valueOf(counter));
+ }
+ return true;
+ }
+}
diff --git a/app/src/main/res/drawable-v24/ic_launcher_foreground.xml b/app/src/main/res/drawable-v24/ic_launcher_foreground.xml
new file mode 100644
index 0000000..1f6bb29
--- /dev/null
+++ b/app/src/main/res/drawable-v24/ic_launcher_foreground.xml
@@ -0,0 +1,34 @@
+
+
+
+
+