I have an application where it is supposed to work like any other memory game. However, I am not sure on how can I write the code to randomize the cards shown every time the users play.
Java:
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
ImageView imgFront;
ImageView imgBack;
ImageView imageView;
ImageView imageView2;
ImageView imageView3;
ImageView imageView4;
ImageView imageView5;
ImageView imageView6;
ImageView imageView7;
ImageView imageView8;
ImageView imageView9;
ImageView imageView10;
ImageView imageView11;
ImageView imageView12;
ImageView imageView13;
ImageView imageView14;
ImageView imageView15;
ImageView imageView16;
ImageView imageView17;
ImageView imageView18;
ImageView imageView19;
ImageView imageView20;
ImageView imageView21;
ImageView imageView22;
boolean isBackVisible = false; // Boolean variable to check if the back image is visible currently
boolean isBackVisible1 = false;
boolean isBackVisible2 = false;
boolean isBackVisible3 = false;
boolean isBackVisible4 = false;
boolean isBackVisible5 = false;
boolean isBackVisible6 = false;
boolean isBackVisible7 = false;
boolean isBackVisible8 = false;
boolean isBackVisible9 = false;
boolean isBackVisible10 = false;
boolean isBackVisible11 = false;
AnimatorSet setRightOut;
AnimatorSet setLeftIn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setRightOut = (AnimatorSet) AnimatorInflater.loadAnimator(getApplicationContext(), R.animator.flight_right_out);
setLeftIn = (AnimatorSet) AnimatorInflater.loadAnimator(getApplicationContext(), R.animator.flight_left_in);
imgFront = (ImageView) findViewById(R.id.imgFront);
imgBack = (ImageView) findViewById(R.id.imgBack);
imageView = (ImageView) findViewById(R.id.imageView);
imageView2 = (ImageView) findViewById(R.id.imageView2);
imageView3 = (ImageView) findViewById(R.id.imageView3);
imageView4 = (ImageView) findViewById(R.id.imageView4);
imageView5 = (ImageView) findViewById(R.id.imageView5);
imageView6 = (ImageView) findViewById(R.id.imageView6);
imageView7 = (ImageView) findViewById(R.id.imageView7);
imageView8 = (ImageView) findViewById(R.id.imageView8);
imageView9 = (ImageView) findViewById(R.id.imageView9);
imageView10 = (ImageView) findViewById(R.id.imageView10);
imageView11 = (ImageView) findViewById(R.id.imageView11);
imageView12 = (ImageView) findViewById(R.id.imageView12);
imageView13 = (ImageView) findViewById(R.id.imageView13);
imageView14 = (ImageView) findViewById(R.id.imageView14);
imageView15 = (ImageView) findViewById(R.id.imageView15);
imageView16 = (ImageView) findViewById(R.id.imageView16);
imageView17 = (ImageView) findViewById(R.id.imageView17);
imageView18 = (ImageView) findViewById(R.id.imageView18);
imageView19 = (ImageView) findViewById(R.id.imageView19);
imageView20 = (ImageView) findViewById(R.id.imageView20);
imageView21 = (ImageView) findViewById(R.id.imageView21);
imageView22 = (ImageView) findViewById(R.id.imageView22);
imgFront.setOnClickListener(this);
imgBack.setOnClickListener(this);
imageView.setOnClickListener(this);
imageView2.setOnClickListener(this);
imageView3.setOnClickListener(this);
imageView4.setOnClickListener(this);
imageView5.setOnClickListener(this);
imageView6.setOnClickListener(this);
imageView7.setOnClickListener(this);
imageView8.setOnClickListener(this);
imageView9.setOnClickListener(this);
imageView10.setOnClickListener(this);
imageView11.setOnClickListener(this);
imageView12.setOnClickListener(this);
imageView13.setOnClickListener(this);
imageView14.setOnClickListener(this);
imageView15.setOnClickListener(this);
imageView16.setOnClickListener(this);
imageView17.setOnClickListener(this);
imageView18.setOnClickListener(this);
imageView19.setOnClickListener(this);
imageView20.setOnClickListener(this);
imageView21.setOnClickListener(this);
imageView22.setOnClickListener(this);
}
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.imgBack:
if (!isBackVisible) {
setRightOut.setTarget(imgFront);
setLeftIn.setTarget(imgBack);
setRightOut.start();
setLeftIn.start();
isBackVisible = true;
} else {
setRightOut.setTarget(imgBack);
setLeftIn.setTarget(imgFront);
setRightOut.start();
setLeftIn.start();
isBackVisible = false;
}
break;
case R.id.imageView2:
if (!isBackVisible1) {
setRightOut.setTarget(imageView);
setLeftIn.setTarget(imageView2);
setRightOut.start();
setLeftIn.start();
isBackVisible1 = true;
} else {
setRightOut.setTarget(imageView2);
setLeftIn.setTarget(imageView);
setRightOut.start();
setLeftIn.start();
isBackVisible1 = false;
}
break;
case R.id.imageView4:
if (!isBackVisible2) {
setRightOut.setTarget(imageView3);
setLeftIn.setTarget(imageView4);
setRightOut.start();
setLeftIn.start();
isBackVisible2 = true;
} else {
setRightOut.setTarget(imageView4);
setLeftIn.setTarget(imageView3);
setRightOut.start();
setLeftIn.start();
isBackVisible2 = false;
}
break;
case R.id.imageView6:
if (!isBackVisible3) {
setRightOut.setTarget(imageView5);
setLeftIn.setTarget(imageView6);
setRightOut.start();
setLeftIn.start();
isBackVisible3 = true;
} else {
setRightOut.setTarget(imageView6);
setLeftIn.setTarget(imageView5);
setRightOut.start();
setLeftIn.start();
isBackVisible3 = false;
}
break;
case R.id.imageView8:
if (!isBackVisible4) {
setRightOut.setTarget(imageView7);
setLeftIn.setTarget(imageView8);
setRightOut.start();
setLeftIn.start();
isBackVisible4 = true;
} else {
setRightOut.setTarget(imageView8);
setLeftIn.setTarget(imageView7);
setRightOut.start();
setLeftIn.start();
isBackVisible4 = false;
}
break;
case R.id.imageView10:
if (!isBackVisible5) {
setRightOut.setTarget(imageView9);
setLeftIn.setTarget(imageView10);
setRightOut.start();
setLeftIn.start();
isBackVisible5 = true;
} else {
setRightOut.setTarget(imageView10);
setLeftIn.setTarget(imageView9);
setRightOut.start();
setLeftIn.start();
isBackVisible5 = false;
}
break;
case R.id.imageView12:
if (!isBackVisible6) {
setRightOut.setTarget(imageView11);
setLeftIn.setTarget(imageView12);
setRightOut.start();
setLeftIn.start();
isBackVisible6 = true;
} else {
setRightOut.setTarget(imageView12);
setLeftIn.setTarget(imageView11);
setRightOut.start();
setLeftIn.start();
isBackVisible6 = false;
}
break;
case R.id.imageView14:
if (!isBackVisible7) {
setRightOut.setTarget(imageView13);
setLeftIn.setTarget(imageView14);
setRightOut.start();
setLeftIn.start();
isBackVisible7 = true;
} else {
setRightOut.setTarget(imageView14);
setLeftIn.setTarget(imageView13);
setRightOut.start();
setLeftIn.start();
isBackVisible7 = false;
}
break;
case R.id.imageView16:
if (!isBackVisible8) {
setRightOut.setTarget(imageView15);
setLeftIn.setTarget(imageView16);
setRightOut.start();
setLeftIn.start();
isBackVisible8 = true;
} else {
setRightOut.setTarget(imageView16);
setLeftIn.setTarget(imageView15);
setRightOut.start();
setLeftIn.start();
isBackVisible8 = false;
}
break;
case R.id.imageView18:
if (!isBackVisible9) {
setRightOut.setTarget(imageView17);
setLeftIn.setTarget(imageView18);
setRightOut.start();
setLeftIn.start();
isBackVisible9 = true;
} else {
setRightOut.setTarget(imageView18);
setLeftIn.setTarget(imageView17);
setRightOut.start();
setLeftIn.start();
isBackVisible9 = false;
}
break;
case R.id.imageView20:
if (!isBackVisible10) {
setRightOut.setTarget(imageView19);
setLeftIn.setTarget(imageView20);
setRightOut.start();
setLeftIn.start();
isBackVisible10 = true;
} else {
setRightOut.setTarget(imageView20);
setLeftIn.setTarget(imageView19);
setRightOut.start();
setLeftIn.start();
isBackVisible10 = false;
}
break;
case R.id.imageView22:
if (!isBackVisible11) {
setRightOut.setTarget(imageView21);
setLeftIn.setTarget(imageView22);
setRightOut.start();
setLeftIn.start();
isBackVisible11 = true;
} else {
setRightOut.setTarget(imageView22);
setLeftIn.setTarget(imageView21);
setRightOut.start();
setLeftIn.start();
isBackVisible11 = false;
}
break;
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
activity_main.xml
<RelativeLayout
android:layout_width="90dp"
android:layout_height="90dp"
android:layout_marginTop="80dp"
android:clickable="true">
<ImageView
android:id="@+id/imgFront"
android:layout_width="90dp"
android:layout_height="90dp"
android:src="@drawable/front"
android:layout_alignTop="@+id/imgBack"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
/>
<ImageView
android:id="@+id/imgBack"
android:layout_width="90dp"
android:layout_height="90dp"
android:alpha="0"
android:src="@drawable/back"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:contentDescription="@string/imgBack" />
</RelativeLayout>
<RelativeLayout
android:layout_width="90dp"
android:layout_height="90dp"
android:layout_marginTop="80dp"
android:clickable="true"
android:layout_marginLeft="135dp">
<ImageView
android:id="@+id/imageView"
android:layout_width="90dp"
android:layout_height="90dp"
android:src="@drawable/front"
android:layout_alignTop="@+id/imageView2"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<ImageView
android:id="@+id/imageView2"
android:layout_width="90dp"
android:layout_height="90dp"
android:alpha="0"
android:src="@drawable/back"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:contentDescription="@string/imgBack" />
</RelativeLayout>
<RelativeLayout
android:layout_width="90dp"
android:layout_height="90dp"
android:layout_marginTop="80dp"
android:clickable="true"
android:layout_marginLeft="265dp">
<ImageView
android:id="@+id/imageView3"
android:layout_width="90dp"
android:layout_height="90dp"
android:src="@drawable/front"
android:layout_alignTop="@+id/imageView4"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<ImageView
android:id="@+id/imageView4"
android:layout_width="90dp"
android:layout_height="90dp"
android:alpha="0"
android:src="@drawable/back"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:contentDescription="@string/imgBack" />
</RelativeLayout>
<RelativeLayout
android:layout_width="90dp"
android:layout_height="90dp"
android:layout_marginTop="180dp"
android:clickable="true" >
<ImageView
android:id="@+id/imageView5"
android:layout_width="90dp"
android:layout_height="90dp"
android:src="@drawable/front"
android:layout_alignTop="@+id/imageView6"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<ImageView
android:id="@+id/imageView6"
android:layout_width="90dp"
android:layout_height="90dp"
android:alpha="0"
android:src="@drawable/back"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:contentDescription="@string/imgBack" />
</RelativeLayout>
<RelativeLayout
android:layout_width="90dp"
android:layout_height="90dp"
android:layout_marginTop="180dp"
android:clickable="true"
android:layout_marginLeft="135dp" >
<ImageView
android:id="@+id/imageView7"
android:layout_width="90dp"
android:layout_height="90dp"
android:src="@drawable/front"
android:layout_alignTop="@+id/imageView8"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<ImageView
android:id="@+id/imageView8"
android:layout_width="90dp"
android:layout_height="90dp"
android:alpha="0"
android:src="@drawable/back"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:contentDescription="@string/imgBack" />
</RelativeLayout>
<RelativeLayout
android:layout_width="90dp"
android:layout_height="90dp"
android:layout_marginTop="180dp"
android:clickable="true"
android:layout_marginLeft="265dp" >
<ImageView
android:id="@+id/imageView9"
android:layout_width="90dp"
android:layout_height="90dp"
android:src="@drawable/front"
android:layout_alignTop="@+id/imageView10"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<ImageView
android:id="@+id/imageView10"
android:layout_width="90dp"
android:layout_height="90dp"
android:alpha="0"
android:src="@drawable/back"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:contentDescription="@string/imgBack" />
</RelativeLayout>
<RelativeLayout
android:layout_width="90dp"
android:layout_height="90dp"
android:layout_marginTop="280dp"
android:clickable="true" >
<ImageView
android:id="@+id/imageView11"
android:layout_width="90dp"
android:layout_height="90dp"
android:src="@drawable/front"
android:layout_alignTop="@+id/imageView12"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<ImageView
android:id="@+id/imageView12"
android:layout_width="90dp"
android:layout_height="90dp"
android:alpha="0"
android:src="@drawable/back"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:contentDescription="@string/imgBack" />
</RelativeLayout>
<RelativeLayout
android:layout_width="90dp"
android:layout_height="90dp"
android:layout_marginTop="280dp"
android:clickable="true"
android:layout_marginLeft="135dp" >
<ImageView
android:id="@+id/imageView13"
android:layout_width="90dp"
android:layout_height="90dp"
android:src="@drawable/front"
android:layout_alignTop="@+id/imageView14"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<ImageView
android:id="@+id/imageView14"
android:layout_width="90dp"
android:layout_height="90dp"
android:alpha="0"
android:src="@drawable/back"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:contentDescription="@string/imgBack" />
</RelativeLayout>
<RelativeLayout
android:layout_width="90dp"
android:layout_height="90dp"
android:layout_marginTop="280dp"
android:clickable="true"
android:layout_marginLeft="265dp" >
<ImageView
android:id="@+id/imageView15"
android:layout_width="90dp"
android:layout_height="90dp"
android:src="@drawable/front"
android:layout_alignTop="@+id/imageView16"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<ImageView
android:id="@+id/imageView16"
android:layout_width="90dp"
android:layout_height="90dp"
android:alpha="0"
android:src="@drawable/back"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:contentDescription="@string/imgBack" />
</RelativeLayout>
<RelativeLayout
android:layout_width="90dp"
android:layout_height="90dp"
android:layout_marginTop="380dp"
android:clickable="true" >
<ImageView
android:id="@+id/imageView17"
android:layout_width="90dp"
android:layout_height="90dp"
android:src="@drawable/front"
android:layout_alignTop="@+id/imageView18"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<ImageView
android:id="@+id/imageView18"
android:layout_width="90dp"
android:layout_height="90dp"
android:alpha="0"
android:src="@drawable/back"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:contentDescription="@string/imgBack" />
</RelativeLayout>
<RelativeLayout
android:layout_width="90dp"
android:layout_height="90dp"
android:layout_marginTop="380dp"
android:clickable="true"
android:layout_marginLeft="135dp" >
<ImageView
android:id="@+id/imageView19"
android:layout_width="90dp"
android:layout_height="90dp"
android:src="@drawable/front"
android:layout_alignTop="@+id/imageView20"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<ImageView
android:id="@+id/imageView20"
android:layout_width="90dp"
android:layout_height="90dp"
android:alpha="0"
android:src="@drawable/back"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:contentDescription="@string/imgBack" />
</RelativeLayout>
<RelativeLayout
android:layout_width="90dp"
android:layout_height="90dp"
android:layout_marginTop="380dp"
android:clickable="true"
android:layout_marginLeft="265dp" >
<ImageView
android:id="@+id/imageView21"
android:layout_width="90dp"
android:layout_height="90dp"
android:src="@drawable/front"
android:layout_alignTop="@+id/imageView22"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<ImageView
android:id="@+id/imageView22"
android:layout_width="90dp"
android:layout_height="90dp"
android:alpha="0"
android:src="@drawable/back"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:contentDescription="@string/imgBack" />
</RelativeLayout>
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