January 19th 2023

Definition of Android Java Projects

Android java projects are used on mobile and tablet. As we know Android is an open-source OS. We can implement android projects to use java. To use Android Java Projects we can develop our project ideas, and create new applications. The android java projects contain multiple ideas, and from that, we can choose a good idea to implement the android projects. Android java projects are widely used.

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Introduction to Android Java Projects

We can create simple as well as advanced projects in android. Android contains the feature of NFC which allows electric devices which easily interact over a short distance. Android also supports multiple keywords and it is very easy to install. Android contains the interactive and beautiful UI of our android java applications.

We can create android java projects in android studio. We need to learn android development tools at the time to develop android java projects. We need to use android studio to support the language of java. We can also use kotlin in android but java is the most popular language to develop java android projects.

Key Takeaways

In mobile and tablet android is a very popular OS. We can implement a different type of application to use java in android that runs on android.
Develop android projects in java is a vital role for any developer because the project contains from beginner to advance levels.

Best Android Java Projects with Source Code in 2023

There are multiple android java projects available.

Below are the android java projects with source code as follows:

1. Tic Tac Toe Project

This is an android java project. In this game plays two players, and every player will get a chance one after another. This game will contain a grid of 3*3. It will contain a total of 9 cells.

Code:

Build.gradle:

android {
compileSdkVersion 29
buildToolsVersion "29.0.3"
defaultConfig {
applicationId "com.dataflair.ticgame"
minSdkVersion 21
targetSdkVersion 29
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}

Gradlew:

while [ …] ; do
ls=`ls -ld "$PRG"`
link=`expr "$ls" : '.*-> \(.*\)$'`
if expr "$link" : '/.*' > /dev/null; then
PRG="$link"
else
PRG=`dirname "$PRG"`"/$link"
fi
done
SAVED="`pwd`"
cd "`dirname \"$PRG\"`/" >/dev/null
APP_HOME="`pwd -P`"
cd "$SAVED" >/dev/null
APP_NAME="Gradle"
APP_BASE_NAME=`basename "$0"`
DEFAULT_JVM_OPTS=""
MAX_FD="maximum"
warn () {
echo "$*"
}
die () {
echo
echo "$*"
echo
exit 1
}
cygwin=false
msys=false
darwin=false
nonstop=false
case "`uname`" in
CYGWIN* )
cygwin=true
;;
Darwin* )
darwin=true
;;
MINGW* )
msys=true
;;
NONSTOP* )
nonstop=true
;;
esac
CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
…..
JAVACMD="$JAVA_HOME/jre/sh/java"
else
JAVACMD="$JAVA_HOME/bin/java"
fi
if [ ! -x "$JAVACMD" ] ; then
…
fi
else
JAVACMD="java"
…
fi
if [] ; then
MAX_FD_LIMIT=`ulimit -H -n`
if [ $? -eq 0 ] ; then
if […] ; then
MAX_FD="$MAX_FD_LIMIT"
fi
ulimit -n $MAX_FD
if [ $? -ne 0 ] ; then
warn "Not set descriptot: $MAX_FD"
fi
else
warn "Not set descriptor limit: $MAX_FD_LIMIT"
fi
fi
if $darwin; then
GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
fi
if $cygwin ; then
APP_HOME=`cygpath --path --mixed "$APP_HOME"`
CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
JAVACMD=`cygpath --unix "$JAVACMD"`
SEP=""
for dir in $ROOTDIRSRAW ; do
ROOTDIRS="$ROOTDIRS$SEP$dir"
SEP="|"
done
OURCYGPATTERN="(^($ROOTDIRS))"
if [ "$GRADLE_CYGPATTERN" != "" ] ; then
OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
fi
i=0
for arg in "$@" ; do
CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
CHECK2=`echo "$arg"|egrep -c "^-"`
if [.. ] ; then
eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
else
eval `echo args$i`="\"$arg\""
fi
i=$((i+1))
done
case $i in
………
esac
fi
save () {
for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
echo " "
}
APP_ARGS=$(save "$@")
eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
if [ ….. ]; then
cd "$(dirname "$0")"
fi
exec "$JAVACMD" "$@"

Below is the output of the above project. We run the project in android studio as follows.

Output:

2. Calculator Android Java Project

Android is an easy application of android java project. This application simply takes input from the user and performs operations as per user requirements. Below is the source code of the calculator android java project as follows.

Code:

Build.grdle:

buildscript {
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:4.2.2'
}
}
allprojects {
repositories {
google()
jcenter()
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}

AndroidManifest.xml:

MainActivity.java:

public class MainActivity extends AppCompatActivity {
TextView edittext1;
…….
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button_0 = (Button) findViewById(R.id.b0);
button_1 = (Button) findViewById(R.id.b1);
button_2 = (Button) findViewById(R.id.b2);
button_3 = (Button) findViewById(R.id.b3);
button_4 = (Button) findViewById(R.id.b4);
button_5 = (Button) findViewById(R.id.b5);
button_6 = (Button) findViewById(R.id.b6);
button_7 = (Button) findViewById(R.id.b7);
button_8 = (Button) findViewById(R.id.b8);
button_9 = (Button) findViewById(R.id.b9);
button_Dot = (Button) findViewById(R.id.bDot);
button_Add = (Button) findViewById(R.id.badd);
button_Sub = (Button) findViewById(R.id.bsub);
button_Mul = (Button) findViewById(R.id.bmul);
button_Div = (Button) findViewById(R.id.biv);
button_Remainder = (Button) findViewById(R.id.BRemain);
button_Del = (Button) findViewById(R.id.buttonDel);
button_Equ = (Button) findViewById(R.id.buttoneql);
edittext1 = (TextView) findViewById(R.id.display);
button_1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
edittext1.setText(edittext1.getText() + "1");
}
});
button_2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
edittext1.setText(edittext1.getText() + "2");
}
});
button_3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
edittext1.setText(edittext1.getText() + "3");
}
});
button_4.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
edittext1.setText(edittext1.getText() + "4");
}
});
button_5.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
edittext1.setText(edittext1.getText() + "5");
}
});
button_6.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
edittext1.setText(edittext1.getText() + "6");
}
});
button_7.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
edittext1.setText(edittext1.getText() + "7");
}
});
button_8.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
edittext1.setText(edittext1.getText() + "8");
}
});
button_9.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
edittext1.setText(edittext1.getText() + "9");
}
});
button_0.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
edittext1.setText(edittext1.getText() + "0");
}
});
button_Add.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (edittext1.getText().length() != 0) {
in1 = Float.parseFloat(edittext1.getText() + "");
Add = true;
deci = false;
edittext1.setText(null);
}
}
});
button_Sub.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (edittext1.getText().length() != 0) {
in1 = Float.parseFloat(edittext1.getText() + "");
Sub = true;
deci = false;
edittext1.setText(null);
}
}
});
button_Mul.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (edittext1.getText().length() != 0) {
in1 = Float.parseFloat(edittext1.getText() + "");
Multiply = true;
deci = false;
edittext1.setText(null);
}
}
});
button_Div.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (edittext1.getText().length() != 0) {
in1 = Float.parseFloat(edittext1.getText() + "");
Divide = true;
deci = false;
edittext1.setText(null);
}
}
});
button_Remainder.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (edittext1.getText().length() != 0) {
in1 = Float.parseFloat(edittext1.getText() + "");
Remainder = true;
deci = false;
edittext1.setText(null);
}
}
});
button_Equ.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (Add || Sub || Multiply || Divide || Remainder) {
i2 = Float.parseFloat(edittext1.getText() + "");
}
if (Add) {
edittext1.setText(in1 + i2 + "");
Add = false;
}
if (Sub) {
 
edittext1.setText(in1 - i2 + "");
Sub = false;
}
if (Multiply) {
edittext1.setText(in1 * i2 + "");
Multiply = false;
}
if (Divide) {
edittext1.setText(in1 / i2 + "");
Divide = false;
}
if (Remainder) {
edittext1.setText(in1 % i2 + "");
Remainder = false;
}
}
});
button_Del.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
edittext1.setText("");
in1 = 0.0;
i2 = 0.0;
}
});
button_Dot.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (deci) {
} else {
edittext1.setText(edittext1.getText() + ".");
deci = true;
}
}
});
}
}

Below is the output of the above project. We run the project in android studio as follows.

Output: