一般人都知道Intent(意圖)是用來幫Activity傳遞參數用的，但如果你的觀念只停留在
Intent只能用來傳遞參數用那就大錯特錯了，下面介紹怎麼使用萬能的Intent幫我們
簡單的就能做很多的事情了。
Activity跳轉-無參數時
Intent it = new Intent(Activity1.this, Activity2.class);
startActivity(it);
Activity跳轉-有參數時
Intent it = new Intent(Activity1.this, Activity2.class);
Bundle bundle=new Bundle();
bundle.putString("ID", "This is Activity1 message!");
it.putExtras(bundle);
startActivity(it);
參數接取方的資料處理程式碼
Bundle bundle=getIntent().getExtras();
String name=bundle.getString("ID");
向上一個Activity返回結果
Intent intent=getIntent();
Bundle bundle=new Bundle();
bundle.putString("ID", "This is from Activity2!");
intent.putExtras(bundle);
setResult(RESULT_OK, intent);
返回結果的處理函數
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode==REQUEST_CODE){
if(resultCode==RESULT_CANCELED)
setTitle("cancle");
else if (resultCode==RESULT_OK) {
String temp=null;
Bundle bundle=data.getExtras();
if(bundle!=null) temp=bundle.getString("ID");
setTitle(temp);
}
}
}
瀏覽網頁
Uri uri = Uri.parse("http://jim690701.blogspot.tw/");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
startActivity(it);
顯示地圖
//輸入經緯度座標呼叫地圖
Uri uri = Uri.parse("geo:38.899533,-77.036476");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
startActivity(it);
路徑規劃
Uri uri = Uri.parse("http://maps.google.com/maps?f=d&saddr=startLat%20startLng&daddr=endLat%20endLng&hl=en");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
startActivity(it);
撥打電話
//注意：使用撥號必須在AndroidManifest.xml 中，加上
//<uses-permission id="android.permission.CALL_PHONE" />
//呼叫撥號程序
Uri uri = Uri.parse("tel:0800000123");
Intent it = new Intent(Intent.ACTION_DIAL, uri);
startActivity(it);
//直接撥號
Uri uri = Uri.parse("tel:0800000123");
Intent it = new Intent(Intent.ACTION_CALL, uri);
startActivity(it);
寄送SMS/MMS簡訊
//呼叫簡訊程序
Intent it = new Intent(Intent.ACTION_VIEW, uri);
it.putExtra("sms_body", "The SMS text");
it.setType("vnd.android-dir/mms-sms");
startActivity(it);
//傳送簡訊
Uri uri = Uri.parse("smsto://0800000123");
Intent it = new Intent(Intent.ACTION_SENDTO, uri);
it.putExtra("sms_body", "The SMS text");
startActivity(it);
//傳送MMS彩訊
//取得手機內圖片連結
Uri uri = Uri.parse("content://media/external/images/media/23");
Intent it = new Intent(Intent.ACTION_SEND);
//簡訊主題
it.putExtra("sms_body", "some text");
it.putExtra(Intent.EXTRA_STREAM, uri);
it.setType("image/png");
startActivity(it);
傳送E-mail
//呼叫mail程序
Uri uri = Uri.parse("mailto:xxx@abc.com");
Intent it = new Intent(Intent.ACTION_SENDTO, uri);
startActivity(it);
//簡易寄送E-mail
Intent it = new Intent(Intent.ACTION_SEND);
it.putExtra(Intent.EXTRA_EMAIL, "me@abc.com");
it.putExtra(Intent.EXTRA_TEXT, "The email body text");
it.setType("text/plain");
startActivity(Intent.createChooser(it, "Choose Email Client"));
//一般寄送E-mail
Intent it=new Intent(Intent.ACTION_SEND);
String[] tos={"me@abc.com"};
String[] ccs={"you@abc.com"};
//主要寄送對象
it.putExtra(Intent.EXTRA_EMAIL, tos);
//cc對象
it.putExtra(Intent.EXTRA_CC, ccs);
//Email內容
it.putExtra(Intent.EXTRA_TEXT, "The email body text");
//Email主題
it.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");
it.setType("message/rfc822");
startActivity(Intent.createChooser(it, "選擇電子郵件客戶端"));
//寄送附件
Intent it = new Intent(Intent.ACTION_SEND);
//Email主題
it.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");
//附件
it.putExtra(Intent.EXTRA_STREAM, "file:///sdcard/mysong.mp3");
//檔案格式
sendIntent.setType("audio/mp3");
startActivity(Intent.createChooser(it, "選擇電子郵件客戶端"));
播放多媒體
//播放手機內的MP3
Uri uri = Uri.parse("file:///sdcard/song.mp3");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
it.setType("audio/mp3");
startActivity(it);
//播放內存的第一個鈴聲
Uri uri = Uri.withAppendedPath(MediaStore.Audio.Media.INTERNAL_CONTENT_URI, "1");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
startActivity(it);
google play應用
//尋找某個應用
Uri uri = Uri.parse("https://play.google.com/store/search?q=jim.memorandum");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
startActivity(it);
//https://play.google.com/store/search?q=這段都一樣
//主要是q後面的搜尋條件，可以是package也可以是名稱
//顯示某個應用的相關信息
Uri uri = Uri.parse("https://play.google.com/store/apps/details?id=jim.memorandum");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
startActivity(it);
//https://play.google.com/store/apps/details?id=這段都一樣
//主要是id後面的package
Uninstall應用程式
//反安裝必須知道package name
Uri uri = Uri.fromParts("package", strPackageName, null);
Intent it = new Intent(Intent.ACTION_DELETE, uri);
startActivity(it);
讀取QR Code
叫用條碼掃描器
Intent intent = new Intent("com.google.zxing.client.android.SCAN");//開啟條碼掃描器
intent.putExtra("SCAN_MODE", "QR_CODE_MODE");//設定QR Code參數
startActivityForResult(intent, 1);//要求回傳1，回傳值可以自由設定
接收掃描後的回傳值
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 1) { //startActivityForResult回傳值，回傳值是由叫用時帶入的設定
if (resultCode == RESULT_OK) {
String contents = data.getStringExtra("SCAN_RESULT");//取得QR Code內容
txt_hello.setText(contents);//顯示儲存值
}
}
}
後記：
看完以上的Intent應用是不是覺得Intent可以用到的地方還真不少吧
我個人是覺得Intent超好用的需要什麼都可以用Intent去呼叫就好，
簡單又能節省程式碼，以上是對萬用Intent的介紹，謝謝。
