Android中用一个应用启动另一个应用并传递参数

app1:

Intent LaunchIntent = getPackageManager().getLaunchIntentForPackage("com.gesoft.productdataupdatetool");
Bundle bundle = new Bundle();
bundle.putString("abcd","ABCD");
LaunchIntent.putExtras(bundle);
startActivity(LaunchIntent);

app2:

AndroidManifest.xml里的Activity下面加
 <category android:name="android.intent.category.DEFAULT" />

数据接收

Intent intent = getIntent();
  if (intent != null) {
      String str = intent.getStringExtra("abcd");
  }