我的变量声明如下:
static private final int GET_TEXT_REQUEST_CODE = 1;
static private final String URL = "http://www.google.com";
static private final String TAG = "Lab-Intents";
static private final String CHOOSER_TEXT = "Load " + URL + " with:";
private TextView mUserTextView;
我不确定如何在onActivityResult()方法中完成代码。我不确定我是否正确更新了显示用户输入的文本的文本视图。我必须使用 Intent.getStringExtra()。我使用,但作为getIntent().getStringExtra("mUserTextView");
private void startImplicitActivation() {
Log.i(TAG, "Entered startImplicitActivation()");
Uri url = Uri.parse(URL);
Intent baseIntent = new Intent(Intent.ACTION_VIEW, url);
Intent chooserIntent = Intent.createChooser(baseIntent, CHOOSER_TEXT);
Log.i(TAG,"Chooser Intent Action:" + chooserIntent.getAction());
startActivity(chooserIntent);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
Log.i(TAG, "Entered onActivityResult()");
// TODO - Process the result only if this method received both a
// RESULT_OK result code and a recognized request code
// If so, update the Textview showing the user-entered text.
if (requestCode == GET_TEXT_REQUEST_CODE){
if (requestCode == RESULT_OK){
getIntent().getStringExtra("mUserTextView");
}
}
}
}
要更新标签,您应该使用:
if ( resultCode == RESULT_OK && requestCode == GET_TEXT_REQUEST_CODE ) {
mUserTextView.setText( data.getStringExtra("resultado"));
}
请记住调用"ExplicitlyLoadedActivity",请求代码GET_TEXT_REQUEST_CODE:
Intent myIntent = new Intent(ActivityLoaderActivity.this, ExplicitlyLoadedActivity.class);
startActivityForResult( myIntent, GET_TEXT_REQUEST_CODE ); // just to be sure about Request code
更改单词"resultado",用于您在 enterClicked() 中用于 ExplicitlyLoadedActivity 的
单词String givenText = mEditText.getText().toString(); // Getting the user input
Intent intencion = new Intent(); // Getting ready to comeback
intencion.putExtra("resultado", givenText); // I use "resultado", spanish guy
setResult(RESULT_OK, intencion); // RESULT_OK is a constant = 1
finish();
祝你好运,实验室在课程中,我也在做。干杯
应以静态方式访问从 Intent 类型createChooser(Intent, CharSequence)
的静态方法。当我在chooserIntent.createChooser(map,CHOOSER_TEXT);
运行相同的代码时,会显示这一点
//法典
private void startImplicitActivation()
{
Log.i(TAG, "Entered startImplicitActivation()");
// TODO - Create a base intent for viewing a URL
// (HINT: second parameter uses parse() from the Uri class)
Intent map = new Intent(Intent.ACTION_VIEW,Uri.parse(URL));
// TODO - Create a chooser intent, for choosing which Activity
// will carry out the baseIntent. Store the Intent in the
// chooserIntent variable below. HINT: using the Intent class'
// createChooser())
Intent chooserIntent=null;
chooserIntent.createChooser(map,CHOOSER_TEXT);
Log.i(TAG,"Chooser Intent Action:" + chooserIntent.getAction());
// TODO - Start the chooser Activity, using the chooser intent
startActivity(chooserIntent);
}
当我运行应用程序时,这会导致错误,如下所示:
unfortunately the project has stopped
chooserIntent 为空。首先创建它:Intent chooserIntent = Intent.createChooser(map, CHOOSER_TEXT);