編輯：關於Android編程
一.需求分析：
1.通過按Android平板（或手機）的物理按鍵（如音量鍵）實現Activity界面的跳轉；以前基本是自己寫控件進行跳轉啊！
2.按音量減鍵跳轉：界面1到界面2，2到3，3到4，4到5，5到1；按音量加鍵跳轉：1到5，5到4，4到3，3到2，2到1。
五個界面顏色1：白色，2：黑色，3：紅，4：綠，5：藍。 目的是用來進行屏的測試。
二、直接上代碼
1.五個類的代碼
Launcher1：
package com.zhc.launcher;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
public class Launcher1 extends Activity implements KeyEvent.Callback {
private static final String TAG = "Launcher";
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// 1.隱藏標題欄
requestWindowFeature(Window.FEATURE_NO_TITLE);
// 2.隱藏狀態欄
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
// 3.隱藏導航欄和狀態欄
View decorView = getWindow().getDecorView();
int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_FULLSCREEN;
decorView.setSystemUiVisibility(uiOptions);
setContentView(R.layout.activity_one);
}
// 4. 攔截系統熱鍵
@Override
public boolean dispatchKeyEvent(KeyEvent event) {
int key = event.getKeyCode();//獲取物理按鍵的key類型：比如音量鍵，power鍵等
int key1 = event.getAction();//獲取某一物理按鍵的對應的事件類型；比如音量鍵的按下（down）事件，音量鍵的松開（up）事件
if (key == KeyEvent.KEYCODE_DPAD_LEFT
|| key == KeyEvent.KEYCODE_VOLUME_UP) {//按下的是安卓物理左鍵或者是音量鍵上鍵
if (key1 == KeyEvent.ACTION_UP) {//音量鍵上鍵的up事件
Log.i(TAG, "1");
Intent intentright = new Intent(Launcher1.this, Launcher5.class);
startActivity(intentright);
return true;
}
} else if (key == KeyEvent.KEYCODE_DPAD_RIGHT
|| key == KeyEvent.KEYCODE_VOLUME_DOWN) {//按下的是安卓物理右鍵或者是音量鍵下鍵
if (key1 == KeyEvent.ACTION_UP) {//音量鍵下鍵的up事件
Log.i(TAG, "2");
Intent intentright = new Intent(Launcher1.this, Launcher2.class);
startActivity(intentright);
return true;
}
}
return super.dispatchKeyEvent(event);
}
}
Launcher2：
package com.zhc.launcher;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
public class Launcher2 extends Activity {
private static final String TAG = "Launcher2";
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// 1.隱藏標題欄
requestWindowFeature(Window.FEATURE_NO_TITLE);
// 2.隱藏狀態欄
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
// 3.隱藏導航欄和狀態欄
View decorView = getWindow().getDecorView();
int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_FULLSCREEN;
decorView.setSystemUiVisibility(uiOptions);
setContentView(R.layout.activity_two);
}
// 攔截系統熱鍵
@Override
public boolean dispatchKeyEvent(KeyEvent event) {
int key = event.getKeyCode();// 獲取物理按鍵的key類型：比如音量鍵，power鍵等
int key1 = event.getAction();// 獲取某一物理按鍵的對應的事件類型；比如音量鍵的按下（down）事件，音量鍵的松開（up）事件
if (key == KeyEvent.KEYCODE_DPAD_LEFT
|| key == KeyEvent.KEYCODE_VOLUME_UP) {// 按下的是安卓物理左鍵或者是音量鍵上鍵
if (key1 == KeyEvent.ACTION_UP) {// 音量鍵上鍵的up事件
Log.i(TAG, "1");
Intent intentright = new Intent(Launcher2.this, Launcher1.class);
startActivity(intentright);
return true;
}
} else if (key == KeyEvent.KEYCODE_DPAD_RIGHT
|| key == KeyEvent.KEYCODE_VOLUME_DOWN) {// 按下的是安卓物理右鍵或者是音量鍵下鍵
if (key1 == KeyEvent.ACTION_UP) {// 音量鍵下鍵的up事件
Log.i(TAG, "2");
Intent intentright = new Intent(Launcher2.this, Launcher3.class);
startActivity(intentright);
return true;
}
}
return super.dispatchKeyEvent(event);
}
}
Launcher3：
package com.zhc.launcher;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
public class Launcher3 extends Activity {
private static final String TAG = "Launcher3";
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// 1.隱藏標題欄
requestWindowFeature(Window.FEATURE_NO_TITLE);
// 2.隱藏狀態欄
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
// 3.隱藏導航欄和狀態欄
View decorView = getWindow().getDecorView();
int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_FULLSCREEN;
decorView.setSystemUiVisibility(uiOptions);
setContentView(R.layout.activity_three);
}
// 攔截系統熱鍵
@Override
public boolean dispatchKeyEvent(KeyEvent event) {
int key = event.getKeyCode();// 獲取物理按鍵的key類型：比如音量鍵，power鍵等
int key1 = event.getAction();// 獲取某一物理按鍵的對應的事件類型；比如音量鍵的按下（down）事件，音量鍵的松開（up）事件
if (key == KeyEvent.KEYCODE_DPAD_LEFT
|| key == KeyEvent.KEYCODE_VOLUME_UP) {// 按下的是安卓物理左鍵或者是音量鍵上鍵
if (key1 == KeyEvent.ACTION_UP) {// 音量鍵上鍵的up事件
Log.i(TAG, "1");
Intent intentright = new Intent(Launcher3.this, Launcher2.class);
startActivity(intentright);
return true;
}
} else if (key == KeyEvent.KEYCODE_DPAD_RIGHT
|| key == KeyEvent.KEYCODE_VOLUME_DOWN) {// 按下的是安卓物理右鍵或者是音量鍵下鍵
if (key1 == KeyEvent.ACTION_UP) {// 音量鍵下鍵的up事件
Log.i(TAG, "2");
Intent intentright = new Intent(Launcher3.this, Launcher4.class);
startActivity(intentright);
return true;
}
}
return super.dispatchKeyEvent(event);
}
}
Launcher4：
package com.zhc.launcher;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
public class Launcher4 extends Activity {
private static final String TAG = "Launcher4";
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// 1.隱藏標題欄
requestWindowFeature(Window.FEATURE_NO_TITLE);
// 2.隱藏狀態欄
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
// 3.隱藏導航欄和狀態欄
View decorView = getWindow().getDecorView();
int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_FULLSCREEN;
decorView.setSystemUiVisibility(uiOptions);
setContentView(R.layout.activity_four);
}
// 攔截系統熱鍵
@Override
public boolean dispatchKeyEvent(KeyEvent event) {
int key = event.getKeyCode();// 獲取物理按鍵的key類型：比如音量鍵，power鍵等
int key1 = event.getAction();// 獲取某一物理按鍵的對應的事件類型；比如音量鍵的按下（down）事件，音量鍵的松開（up）事件
if (key == KeyEvent.KEYCODE_DPAD_LEFT
|| key == KeyEvent.KEYCODE_VOLUME_UP) {// 按下的是安卓物理左鍵或者是音量鍵上鍵
if (key1 == KeyEvent.ACTION_UP) {// 音量鍵上鍵的up事件
Log.i(TAG, "1");
Intent intentright = new Intent(Launcher4.this, Launcher3.class);
startActivity(intentright);
return true;
}
} else if (key == KeyEvent.KEYCODE_DPAD_RIGHT
|| key == KeyEvent.KEYCODE_VOLUME_DOWN) {// 按下的是安卓物理右鍵或者是音量鍵下鍵
if (key1 == KeyEvent.ACTION_UP) {// 音量鍵下鍵的up事件
Log.i(TAG, "2");
Intent intentright = new Intent(Launcher4.this, Launcher5.class);
startActivity(intentright);
return true;
}
}
return super.dispatchKeyEvent(event);
}
}
Launcher5：
package com.zhc.launcher;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
public class Launcher5 extends Activity {
private static final String TAG = "Launcher5";
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// 1.隱藏標題欄
requestWindowFeature(Window.FEATURE_NO_TITLE);
// 2.隱藏狀態欄
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
// 3.隱藏導航欄和狀態欄
View decorView = getWindow().getDecorView();
int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_FULLSCREEN;
decorView.setSystemUiVisibility(uiOptions);
setContentView(R.layout.activity_five);
}
// 攔截系統熱鍵
@Override
public boolean dispatchKeyEvent(KeyEvent event) {
int key = event.getKeyCode();// 獲取物理按鍵的key類型：比如音量鍵，power鍵等
int key1 = event.getAction();// 獲取某一物理按鍵的對應的事件類型；比如音量鍵的按下（down）事件，音量鍵的松開（up）事件
if (key == KeyEvent.KEYCODE_DPAD_LEFT
|| key == KeyEvent.KEYCODE_VOLUME_UP) {// 按下的是安卓物理左鍵或者是音量鍵上鍵
if (key1 == KeyEvent.ACTION_UP) {// 音量鍵上鍵的up事件
Log.i(TAG, "1");
Intent intentright = new Intent(Launcher5.this, Launcher4.class);
startActivity(intentright);
return true;
}
} else if (key == KeyEvent.KEYCODE_DPAD_RIGHT
|| key == KeyEvent.KEYCODE_VOLUME_DOWN) {// 按下的是安卓物理右鍵或者是音量鍵下鍵
if (key1 == KeyEvent.ACTION_UP) {// 音量鍵下鍵的up事件
Log.i(TAG, "2");
Intent intentright = new Intent(Launcher5.this, Launcher1.class);
startActivity(intentright);
return true;
}
}
return super.dispatchKeyEvent(event);
}
}
3.清單文件
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