android:android Intent and IntentFilter

文章来自:http://blog.csdn.net/intbird
如果说是将一个activity有其他应用打开,或者是在webView中调用我们自己的activity,那么最好就是使用intentfilter来过滤我们需要的activity;
说明什么是uri参数
Java Code:

final Uri uri =  Uri.parse("intbird://com.intbird.soft/testing/tested?name=‘Test‘");

        TextView textView = (TextView)findViewById(R.id.textView);
        textView.setText(uri.getScheme() + "\n" //intbird
                        + uri.getPort() + "\n"  //-1

                        + uri.getAuthority() + "\n" //com.intbird.soft
                        + uri.getHost() + "\n"  //com.intbird.soft

                        + uri.getPath() + "\n" // /testing/tested
                        + uri.getPathSegments() + "\n" // [tesing,tested]

                        + uri.getQuery()+"\n"); // name=‘Text‘

public void onClick(View v) {

                Intent intent = new Intent();
                intent.setAction("android.intent.action.VIEW");
                intent.setData(uri);

                PackageManager packageManager = getPackageManager();
                List<ResolveInfo> activities = packageManager.queryIntentActivities(intent,0);
                boolean isIntentSafe  = activities.size() > 0;
                if(isIntentSafe){
                    startActivity(intent);
                }else{
                    Toast.makeText(MainActivity.this, "匹配None", Toast.LENGTH_SHORT).show();
                }
            }

XML Code:
NOTE : 必须有category标签

<activity
            android:name=".MyIntentFilter"
            android:label="@string/app_name" >
            <intent-filter>
                <category android:name="android.intent.category.DEFAULT"></category>
                <action android:name="android.intent.action.VIEW"/>
                <data android:scheme="intbird" android:host="com.intbird.soft"/>
            </intent-filter>
        </activity>

结合一个调用网页加深理解

final Uri urihttp = Uri.parse(“https://www.baidu.com/s?wd=intbird“);
//schma : http
//host : www.baidu.com
//path : /s
//query : wd= intbird

XML

<activity
            android:name=".MyIntentFilter2"
            android:label="@string/app_name" >
            <intent-filter>
                <category android:name="android.intent.category.DEFAULT"/>
                <action android:name="android.intent.action.VIEW"/>
                <data android:scheme="https"  android:host="www.baidu.com" />
            </intent-filter>
        </activity>

SO:
多个匹配,弹出 Intent Chooser