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| Membuat Aplikasi Guitar TUNER Android di Eclipse |
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| Guitar Tuner Android |
Aplikasi ini dilengkapi 6 button masingmasing mewakili 1 senar, dan sebuah button untuk keluar. Jika button “Senar A” di klik, maka android mengeluarkan bunyi senar gitar nada A. Kira-kira seperti itulah idenya.
Untuk project ini, silakan mendownload dari internet bunyi string gitar (www.omayib.com/downloads).
Mari, sekarang kita lihat code aplikasinya
- Bikin project baru
- Bikin folder baru /res/raw. Paste file suara string gitar didalam folder ini, lihat gambar
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| Gambar 21.1. Isi folder /res/raw |
3. Siapkan dulu data string di Strings.xml
1: <?xml version="1.0" encoding="utf-8"?>
2: <resources>
3: <string name="hello">Pilih salah satu string</string>
4: <string name="app_name">Guitar Tuner </string>
5: <color name="bg">#ffffff</color>
6: <color name="textColor">#ff0000</color>
7: <color name="textColor2">#000000</color>
8: <string name="e1">Senar E</string>
9: <string name="a">Senar A</string>
10: <string name="d">Senar D</string>
11: <string name="g">Senar G</string>
12: <string name="b">Senar B</string>
13: <string name="e2">Senar E</string>
14: <string name="keluarBtn">Keluar</string>
15: <string name="Deskripsi_Gambar">Guitar Image</string>
16: </resources>
4. Sekarang kita bikin layoutnya di Main.xml
1: <?xml version="1.0" encoding="utf-8"?>
2: <ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
3: android:id="@+id/scrollView1"
4: android:layout_width="fill_parent"
5: android:layout_height="fill_parent" >
6:
7: <LinearLayout
8: android:layout_width="fill_parent"
9: android:layout_height="wrap_content"
10: android:background="@color/bg"
11: android:orientation="vertical" >
12:
13: <TextView
14: android:layout_width="fill_parent"
15: android:layout_height="wrap_content"
16: android:fitsSystemWindows="true"
17: android:focusable="true"
18: android:focusableInTouchMode="true"
19: android:gravity="top"
20: android:text="@string/hello"
21: android:textColor="@color/textColor2" />
22:
23: <ImageView
24: android:id="@+id/imageView1"
25: android:layout_width="wrap_content"
26: android:layout_height="wrap_content"
27: android:layout_gravity="center_horizontal"
28: android:contentDescription="@string/Deskripsi_Gb"
29: android:scaleType="center"
30: android:src="@drawable/gitar" />
31:
32: <Button
33: android:id="@+id/stringE1"
34: android:layout_width="fill_parent"
35: android:layout_height="wrap_content"
36: android:text="@string/e1" >
37: </Button>
38:
39: <Button
40: android:id="@+id/stringA"
41: android:layout_width="fill_parent"
42: android:layout_height="wrap_content"
43: android:text="@string/a" >
44: </Button>
45:
46: <Button
47: android:id="@+id/stringD"
48: android:layout_width="fill_parent"
49: android:layout_height="wrap_content"
50: android:text="@string/d" >
51: </Button>
52:
53: <Button
54: android:id="@+id/stringG"
55: android:layout_width="fill_parent"
56: android:layout_height="wrap_content"
57: android:text="@string/g" >
58: </Button>
59:
60: <Button
61: android:id="@+id/stringB"
62: android:layout_width="fill_parent"
63: android:layout_height="wrap_content"
64: android:text="@string/b" >
65: </Button>
66:
67: <Button
68: android:id="@+id/stringE"
69: android:layout_width="fill_parent"
70: android:layout_height="wrap_content"
71: android:text="@string/e2" >
72: </Button>
73:
74: <TextView
75: android:id="@+id/keterangan"
76: android:layout_width="fill_parent"
77: android:layout_height="wrap_content"
78: android:layout_gravity="center_horizontal"
79: android:text=""
80: android:textColor="@color/textColor"
81: android:textStyle="bold" >
82: </TextView>
83:
84: <Button
85: android:id="@+id/keluar"
86: android:layout_width="wrap_content"
87: android:layout_height="wrap_content"
88: android:layout_gravity="right"
89: android:text="@string/keluarBtn" >
90: </Button>
91:
92: </LinearLayout>
93:
94: </ScrollView>
5. Berikut adalah activity tunerGitar.java
1: package code.tunerGitar;
2:
3: import android.app.Activity;
4: import android.media.MediaPlayer;
5: import android.os.Bundle;
6: import android.view.View;
7: import android.view.View.OnClickListener;
8: import android.widget.Button;
9: import android.widget.TextView;
10: import android.widget.Toast;
11:
12: public class tunerGitar extends Activity {
13:
14: private static final String isPlaying = "Kamu
15: mendengarkan ";
16: private MediaPlayer player;
17: private Button EButton;
18: private Button BButton;
19: private Button GButton;
20: private Button DButton;
21: private Button AButton;
22: private Button E2Button;
23: private Button keluar;
24: TextView keterangan;
25:
26: /** Called when the activity is first created. */
27: @Override
28: public void onCreate(Bundle savedInstanceState) {
29: super.onCreate(savedInstanceState);
30: setContentView(R.layout.main);
31: EButton = (Button) this.findViewById(R.id.stringE);
32: EButton.setOnClickListener(new OnClickListener() {
33: @Override
34: public void onClick(View arg0) {
35: playSound(1);
36: }
37: });
38: BButton = (Button) this.findViewById(R.id.stringB);
39: BButton.setOnClickListener(new OnClickListener() {
40: @Override
41: public void onClick(View arg0) {
42: playSound(2);
43: }
44: });
45: GButton = (Button) this.findViewById(R.id.stringG);
46: GButton.setOnClickListener(new OnClickListener() {
47: @Override
48: public void onClick(View arg0) {
49: playSound(3);
50: }
51: });
52: DButton = (Button) this.findViewById(R.id.stringD);
53: DButton.setOnClickListener(new OnClickListener() {
54: @Override
55: public void onClick(View arg0) {
56: playSound(4);
57: }
58: });
59: AButton = (Button) this.findViewById(R.id.stringA);
60: AButton.setOnClickListener(new OnClickListener() {
61: @Override
62: public void onClick(View arg0) {
63: playSound(5);
64: }
65: });
66: E2Button = (Button)this.findViewById(R.id.stringE1);
67: E2Button.setOnClickListener(new OnClickListener() {
68: @Override
69: public void onClick(View arg0) {
70: playSound(6);
71: }
72: });
73: keluar = (Button) this.findViewById(R.id.keluar);
74: keluar.setOnClickListener(new OnClickListener() {
75: @Override
76: public void onClick(View arg0) {
77: tunerGitar.this.finish();
78: }
79: });
80: keterangan = (TextView)
81: this.findViewById(R.id.keterangan);
82: }
83:
84: @Override
85: public void onPause() {
86: try {
87: super.onPause();
88: player.pause();
89: } catch (Exception e) {
90: }
91: }
92:
93: public void onStop() {
94: super.onStop();
95: player.stop();
96: }
97:
98: private void playSound(int arg) {
99: try {
100: if (player.isPlaying()) {
101: player.stop();
102: player.release();
103: }
104: } catch (Exception e) {
105: Toast.makeText(this, e.toString(),
106: Toast.LENGTH_SHORT).show();
107: }
108: if (arg == 1) {
109: player = MediaPlayer.create(this, R.raw.e3);
110: keterangan.setText(isPlaying + "String E");
111: } else if (arg == 2) {
112: player = MediaPlayer.create(this, R.raw.b2);
113: keterangan.setText(isPlaying + "String B");
114: } else if (arg == 3) {
115: player = MediaPlayer.create(this, R.raw.g2);
116: keterangan.setText(isPlaying + "String G");
117: } else if (arg == 4) {
118: player = MediaPlayer.create(this, R.raw.d2);
119: keterangan.setText(isPlaying + "String D");
120: } else if (arg == 5) {
121: player = MediaPlayer.create(this, R.raw.a1);
122: keterangan.setText(isPlaying + "String A");
123: } else if (arg == 6) {
124: player = MediaPlayer.create(this, R.raw.e1);
125: keterangan.setText(isPlaying + "String E");
126: }
127: player.setLooping(true);
128: player.start();
129: }
130: }
Sumber: omayib.com