Android应用程序在emulator中崩溃,但stacktrace和日志缺失

Intent from Google , 您的意图无效: Intent intent = new Intent(this, null);

Intent intent = new Intent(this, DisplayMessageActivity.class);
EditText editText = (EditText) findViewById(R.id.editText);
String message = editText.getText().toString();
intent.putExtra(EXTRA_MESSAGE, message);
startActivity(intent);